{"id":84880,"date":"2026-10-16T09:00:00","date_gmt":"2026-10-16T13:00:00","guid":{"rendered":"https:\/\/www.ss396.com\/cars\/?p=84880"},"modified":"2026-09-24T13:55:49","modified_gmt":"2026-09-24T17:55:49","slug":"chevrolet-and-gmc-truck-vin-decoder","status":"publish","type":"post","link":"https:\/\/www.ss396.com\/cars\/chevrolet-and-gmc-truck-vin-decoder\/","title":{"rendered":"Chevrolet and GMC Truck VIN Decoder"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"84880\" class=\"elementor elementor-84880\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-cf933d6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"cf933d6\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-40fe3d8\" data-id=\"40fe3d8\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-31e8610 elementor-widget elementor-widget-text-editor\" data-id=\"31e8610\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Looking to decode the VIN of your classic Chevrolet or GMC truck, blazer, or Jimmy? Our comprehensive classic GM truck VIN decoder is the ultimate tool for identifying your vintage rig\u2019s factory specifications. Whether you are restoring a legendary 1967\u20131972 &#8220;Action Line&#8221; pickup, verifying a 1973\u20131987 &#8220;Square Body&#8221; C10 or K10, or tracking down the history of a first-generation K5 Blazer or GMC Jimmy, understanding your Vehicle Identification Number helps tell the story and verify the truck. Over the decades, General Motors shifted formats significantly, using unique 12-digit serial numbers in the 1960s, 13-digit codes in the 1970s, and the standardized 17-character VIN format starting in 1981. Use our interactive tool below to decode your classic Chevy or GMC truck instantly!<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b866e08 elementor-widget elementor-widget-text-editor\" data-id=\"b866e08\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div id=\"gm-truck-vin-decoder\" style=\"max-width:750px; font-family:-apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background:#f9f9f9; padding:25px; border:1px solid #ddd; border-radius:6px; margin: 20px 0;\">\n    <h2 style=\"margin-top:0; color:#333;\">GM Classic Truck &#038; SUV VIN Decoder (1960\u20131987)<\/h2>\n    <p style=\"font-size:14px; color:#666; margin-bottom:15px;\">Decodes Chevrolet &#038; GMC Pickups, Blazers, Jimmys, and Suburbans from 1960 to 1987.<\/p>\n    \n    <label for=\"vinInput\"><strong>Enter VIN:<\/strong><\/label><br \/>\n    <input id=\"vinInput\" type=\"text\" placeholder=\"Example: C1446S123456 or 1GCDC14H5BS123456\" style=\"width:100%; padding:12px; margin:10px 0; border:1px solid #ccc; border-radius:4px; font-family: monospace; font-size:16px; box-sizing: border-box;\"\/>\n\n    <button onclick=\"decodeGMTruckVin()\" style=\"padding:12px 24px; cursor:pointer; background:#d9534f; color:#fff; border:none; border-radius:4px; font-weight:bold; font-size:15px; transition: background 0.2s;\">\n        Decode VIN\n    <\/button>\n    \n    <div id=\"vinResult\" style=\"margin-top:20px; padding:15px; border:1px solid #ddd; border-radius:4px; background:#fff; display:none;\"><\/div>\n<\/div>\n\n<script>\nfunction decodeGMTruckVin() {\n    const vin = document.getElementById(\"vinInput\").value.trim().toUpperCase();\n    const resultDiv = document.getElementById(\"vinResult\");\n\n    if (!vin) {\n        resultDiv.style.display = \"block\";\n        resultDiv.innerHTML = \"<span style='color:red;'><strong>Error:<\/strong> Please enter a VIN.<\/span>\";\n        return;\n    }\n\n    resultDiv.style.display = \"block\";\n    let outputHtml = `<h3>Decoded VIN: ${vin}<\/h3><table style='width:100%; border-collapse: collapse; margin-top:10px;'>`;\n\n    function addRow(label, value) {\n        outputHtml += `<tr style='border-bottom: 1px solid #eee;'><td style='padding: 8px 0; font-weight: bold; width: 40%; color:#555;'>${label}:<\/td><td style='padding: 8px 0; color:#222;'>${value}<\/td><\/tr>`;\n    }\n\n    \/\/ Common shared assembly plant map\n    const commonPlants = {\n        \"A\": \"Atlanta, Georgia\", \"B\": \"Baltimore, Maryland\", \"F\": \"Flint, Michigan\", \n        \"H\": \"Fremont, California\", \"J\": \"Janesville, Wisconsin\", \"K\": \"Kansas City, Missouri\", \n        \"N\": \"Norwood, Ohio\", \"P\": \"Pontiac, Michigan\", \"S\": \"St. Louis, Missouri\", \n        \"T\": \"Tarrytown, New York\", \"Z\": \"Fremont, California\", \"1\": \"Oshawa, Ontario, Canada\", \n        \"V\": \"Pontiac, Michigan (GMC)\", \"M\": \"Lansing, Michigan\", \"C\": \"South Gate, California \/ Cheyenne\"\n    };\n\n    \/\/ --- STRUCTURE 1: 17 Characters (1981-1987+) ---\n    if (vin.length === 17) {\n        const wmi = vin.substring(0, 3);\n        const chassis = vin[4];\n        const bodyType = vin[6];\n        const engine = vin[7];\n        const yearChar = vin[9];\n        const plantChar = vin[10];\n        const sequence = vin.substring(11);\n\n        let brand = \"Unknown GM Division\";\n        if (wmi.startsWith(\"1GC\") || wmi.startsWith(\"2GC\") || wmi.startsWith(\"3GC\")) brand = \"Chevrolet Truck \/ SUV\";\n        if (wmi.startsWith(\"1GT\") || wmi.startsWith(\"2GT\") || wmi.startsWith(\"3GT\")) brand = \"GMC Truck \/ SUV\";\n\n        const chassisMap = { \"C\": \"2-Wheel Drive\", \"K\": \"4-Wheel Drive\", \"G\": \"Van\", \"P\": \"Forward Control \/ Commercial\" };\n        const bodyMap = { \"4\": \"Two-Door Cab \/ Pickup\", \"8\": \"Blazer \/ Jimmy Utility\", \"9\": \"Suburban\" };\n        const yearMap = { \"B\": \"1981\", \"C\": \"1982\", \"D\": \"1983\", \"E\": \"1984\", \"F\": \"1985\", \"G\": \"1986\", \"H\": \"1987\" };\n\n        addRow(\"Era \/ Format\", \"1981-Present Standardized 17-Character VIN\");\n        addRow(\"Manufacturer\", brand);\n        addRow(\"Chassis Type\", chassisMap[chassis] || \"Unknown code: \" + chassis);\n        addRow(\"Body Configuration\", bodyMap[bodyType] || \"Truck \/ Custom Extension (Code: \" + bodyType + \")\");\n        addRow(\"Engine Code\", `Identifier [${engine}]`);\n        addRow(\"Model Year\", yearMap[yearChar] || \"Classic 1981+ (Code: \" + yearChar + \")\");\n        addRow(\"Assembly Plant\", commonPlants[plantChar] || \"Unknown code: \" + plantChar);\n        addRow(\"Production Sequence\", sequence);\n\n    \/\/ --- STRUCTURE 2: 13 Characters (1973\u20131980 Format) ---\n    } else if (vin.length === 13 && (vin[0] === 'C' || vin[0] === 'T')) {\n        const brandChar = vin[0];\n        const chassisChar = vin[1];\n        const engineChar = vin[2];\n        const seriesChar = vin[3];\n        const bodyChar = vin[4];\n        const yearChar = vin[5];\n        const plantChar = vin[6];\n        const sequence = vin.substring(7);\n\n        const brandMap = { \"C\": \"Chevrolet Division\", \"T\": \"GMC Division\" };\n        const chassisMap = { \n            \"C\": \"2-Wheel Drive Conventional\", \n            \"K\": \"4-Wheel Drive Conventional\" \n        };\n        const yearMap = { \"3\": \"1973\", \"4\": \"1974\", \"5\": \"1975\", \"6\": \"1976\", \"7\": \"1977\", \"8\": \"1978\", \"9\": \"1979\", \"0\": \"1980\" };\n        const seriesMap = { \"1\": \"1\/2-Ton (10 \/ 1500 Series)\", \"2\": \"3\/4-Ton (20 \/ 2500 Series)\", \"3\": \"1-Ton (30 \/ 3500 Series)\" };\n        const bodyMap = { \n            \"4\": \"Pickup \/ Fleetside \/ Stepside\", \n            \"6\": \"Suburban Wagon\", \n            \"2\": \"Blazer \/ Jimmy (Full Utility Open\/Removable Top)\", \n            \"3\": \"Cab & Chassis\" \n        };\n\n        addRow(\"Era \/ Format\", \"1973\u20131980 Pre-Standardized VIN\");\n        addRow(\"Division\", brandMap[brandChar] || \"Unknown\");\n        addRow(\"Chassis\/Drive Type\", chassisMap[chassisChar] || \"Unknown: \" + chassisChar);\n        addRow(\"Engine Code\", `Identifier [${engineChar}]`);\n        addRow(\"Series Rating\", seriesMap[seriesChar] || \"Unknown: \" + seriesChar);\n        addRow(\"Body Style\", bodyMap[bodyChar] || \"Unknown Code: \" + bodyChar);\n        addRow(\"Model Year\", yearMap[yearChar] || \"Unknown: \" + yearChar);\n        addRow(\"Assembly Plant\", commonPlants[plantChar] || \"Unknown: \" + plantChar);\n        addRow(\"Production Sequence\", sequence);\n\n    \/\/ --- STRUCTURE 3: 12 Characters (Detects 1960-1964 vs 1965-1972) ---\n    } else if (vin.length === 12 || vin.length === 13) {\n        const firstCharIsNumber = !isNaN(parseInt(vin[0]));\n\n        if (firstCharIsNumber) {\n            \/\/ --- 1960\u20131964 Chevrolet Format ---\n            const yearChar = vin[0];\n            const chassisChar = vin[1];\n            const series = vin.substring(2, 4);\n            const modelChar = vin[4];\n            const plantChar = vin[5];\n            const sequence = vin.substring(6);\n\n            const yearMap = { \"0\": \"1960\", \"1\": \"1961\", \"2\": \"1962\", \"3\": \"1963\", \"4\": \"1964\" };\n            const chassisMap = { \"C\": \"2-Wheel Drive Conventional\", \"K\": \"4-Wheel Drive\" };\n            const seriesMap = { \"14\": \"1\/2-Ton Short Bed (115\\\" WB)\", \"15\": \"1\/2-Ton Long Bed (127\\\" WB)\", \"25\": \"3\/4-Ton Long Bed (127\\\" WB)\" };\n            const modelMap = { \"2\": \"Flat-face Cowl\", \"3\": \"Cab and Chassis\", \"4\": \"Pickup Box \/ Bed\", \"5\": \"Panel Body\", \"6\": \"Suburban\", \"9\": \"Platform\/Stake\" };\n\n            addRow(\"Era \/ Format\", \"1960\u20131964 Early GM Truck Format\");\n            addRow(\"Model Year\", yearMap[yearChar] || \"Unknown: \" + yearChar);\n            addRow(\"Chassis Type\", chassisMap[chassisChar] || \"Unknown: \" + chassisChar);\n            addRow(\"Series Designation\", seriesMap[series] || \"Series Code: \" + series);\n            addRow(\"Model Body Type\", modelMap[modelChar] || \"Unknown: \" + modelChar);\n            addRow(\"Assembly Plant\", commonPlants[plantChar] || \"Unknown: \" + plantChar);\n            addRow(\"Production Sequence\", sequence);\n\n        } else {\n            \/\/ --- 1965\u20131972 Chevrolet Format (Covers 1969-72 First-Gen Blazers!) ---\n            const chassisChar = vin[0];\n            const series = vin.substring(1, 3);\n            const modelChar = vin[3];\n            const yearChar = vin[4];\n            const plantChar = vin[5];\n            const sequence = vin.substring(6);\n\n            const chassisMap = { \"C\": \"2-Wheel Drive\", \"K\": \"4-Wheel Drive\" };\n            const seriesMap = { \"14\": \"1\/2-Ton Short Chassis \/ Blazer (115\\\" WB)\", \"15\": \"1\/2-Ton Long Bed (127\\\" WB)\", \"25\": \"3\/4-Ton Long Bed (127\\\" WB)\" };\n            const modelMap = { \"4\": \"Pickup Bed\", \"6\": \"Suburban \/ Blazer Utility Body\" };\n            const yearMap = { \"5\": \"1965\", \"6\": \"1966\", \"7\": \"1967\", \"8\": \"1968\", \"9\": \"1969\", \"0\": \"1970\", \"1\": \"1971\", \"2\": \"1972\" };\n            \n            addRow(\"Era \/ Format\", \"1965\u20131972 Early GM Truck\/SUV Format\");\n            addRow(\"Chassis Type\", chassisMap[chassisChar] || \"Unknown: \" + chassisChar);\n            addRow(\"Series\/Wheelbase\", seriesMap[series] || \"Series Code: \" + series);\n            addRow(\"Body Type\", modelMap[modelChar] || \"Code: \" + modelChar);\n            addRow(\"Model Year\", yearMap[yearChar] || \"Unknown: \" + yearChar);\n            addRow(\"Assembly Plant\", commonPlants[plantChar] || \"Unknown: \" + plantChar);\n            addRow(\"Production Sequence\", sequence);\n        }\n    } else {\n        resultDiv.innerHTML = \"<span style='color:red;'><strong>Error:<\/strong> Invalid VIN length. Classic GM Truck\/SUV VINs are 12 digits (1960-72), 13 digits (1973-80), or 17 digits (1981+).<\/span>\";\n        return;\n    }\n\n    outputHtml += \"<\/table>\";\n    resultDiv.innerHTML = outputHtml;\n}\n<\/script>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-07d7921 elementor-widget elementor-widget-image\" data-id=\"07d7921\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/67-72chevytrucks.com\/vboard\/showthread.php?t=463670\" target=\"_blank\" rel=\"noopener\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"516\" height=\"387\" src=\"https:\/\/www.ss396.com\/cars\/wp-content\/uploads\/2026\/07\/image-8.png\" class=\"attachment-large size-large wp-image-84893\" alt=\"\" srcset=\"https:\/\/www.ss396.com\/cars\/wp-content\/uploads\/2026\/07\/image-8.png 516w, https:\/\/www.ss396.com\/cars\/wp-content\/uploads\/2026\/07\/image-8-300x225.png 300w\" sizes=\"(max-width: 516px) 100vw, 516px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8ca8b83 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8ca8b83\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-300e8c3\" data-id=\"300e8c3\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-71516d2 elementor-widget elementor-widget-text-editor\" data-id=\"71516d2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3 data-path-to-node=\"2\">Classic GM Truck &amp; SUV VIN Code Reference Chart<\/h3><table data-path-to-node=\"3\"><thead><tr><td><strong>Era \/ Model Years<\/strong><\/td><td><strong>VIN Length<\/strong><\/td><td><strong>Character Position &amp; Formatting Breakdown<\/strong><\/td><td><strong>Covered Models &amp; Key Notes<\/strong><\/td><\/tr><\/thead><tbody><tr><td><span data-path-to-node=\"3,1,0,0\"><b data-path-to-node=\"3,1,0,0\" data-index-in-node=\"0\">1960\u20131964<\/b><\/span><\/td><td><span data-path-to-node=\"3,1,1,0\"><b data-path-to-node=\"3,1,1,0\" data-index-in-node=\"0\">12 Digits<\/b><\/span><\/td><td><p data-path-to-node=\"3,1,2,0\"><code data-path-to-node=\"3,1,2,0\" data-index-in-node=\"0\">1st:<\/code> Model Year<\/p><br data-path-to-node=\"3,1,2,1\" \/><p data-path-to-node=\"3,1,2,2\"><code data-path-to-node=\"3,1,2,2\" data-index-in-node=\"0\">2nd:<\/code> Chassis\/Drive Type<\/p><br data-path-to-node=\"3,1,2,3\" \/><p data-path-to-node=\"3,1,2,4\"><code data-path-to-node=\"3,1,2,4\" data-index-in-node=\"0\">3rd\u20134th:<\/code> Series\/Wheelbase Designation<\/p><br data-path-to-node=\"3,1,2,5\" \/><p data-path-to-node=\"3,1,2,6\"><code data-path-to-node=\"3,1,2,6\" data-index-in-node=\"0\">5th:<\/code> Model Body Type<\/p><br data-path-to-node=\"3,1,2,7\" \/><p data-path-to-node=\"3,1,2,8\"><code data-path-to-node=\"3,1,2,8\" data-index-in-node=\"0\">6th:<\/code> Assembly Plant<\/p><br data-path-to-node=\"3,1,2,9\" \/><p data-path-to-node=\"3,1,2,10\"><code data-path-to-node=\"3,1,2,10\" data-index-in-node=\"0\">7th\u201312th:<\/code> Production Sequence Number<\/p><\/td><td><span data-path-to-node=\"3,1,3,0\">Covers C\/K Series Pickups, Suburbans, and Panels. VIN always starts with a number (e.g., <code data-path-to-node=\"3,1,3,0\" data-index-in-node=\"89\">0<\/code> for 1960, <code data-path-to-node=\"3,1,3,0\" data-index-in-node=\"101\">3<\/code> for 1963).<\/span><\/td><\/tr><tr><td><span data-path-to-node=\"3,2,0,0\"><b data-path-to-node=\"3,2,0,0\" data-index-in-node=\"0\">1965\u20131972<\/b><\/span><\/td><td><span data-path-to-node=\"3,2,1,0\"><b data-path-to-node=\"3,2,1,0\" data-index-in-node=\"0\">12\u201313 Digits<\/b><\/span><\/td><td><p data-path-to-node=\"3,2,2,0\"><code data-path-to-node=\"3,2,2,0\" data-index-in-node=\"0\">1st:<\/code> Chassis\/Drive Type<\/p><br data-path-to-node=\"3,2,2,1\" \/><p data-path-to-node=\"3,2,2,2\"><code data-path-to-node=\"3,2,2,2\" data-index-in-node=\"0\">2nd\u20133rd:<\/code> Series\/Wheelbase Designation<\/p><br data-path-to-node=\"3,2,2,3\" \/><p data-path-to-node=\"3,2,2,4\"><code data-path-to-node=\"3,2,2,4\" data-index-in-node=\"0\">4th:<\/code> Model Body Type<\/p><br data-path-to-node=\"3,2,2,5\" \/><p data-path-to-node=\"3,2,2,6\"><code data-path-to-node=\"3,2,2,6\" data-index-in-node=\"0\">5th:<\/code> Model Year<\/p><br data-path-to-node=\"3,2,2,7\" \/><p data-path-to-node=\"3,2,2,8\"><code data-path-to-node=\"3,2,2,8\" data-index-in-node=\"0\">6th:<\/code> Assembly Plant<\/p><br data-path-to-node=\"3,2,2,9\" \/><p data-path-to-node=\"3,2,2,10\"><code data-path-to-node=\"3,2,2,10\" data-index-in-node=\"0\">7th\u201312th:<\/code> Production Sequence Number<\/p><\/td><td><span data-path-to-node=\"3,2,3,0\">Covers &#8220;Action Line&#8221; Pickups, K5 Blazers, GMC Jimmys, and Suburbans. VIN starts with a letter (<code data-path-to-node=\"3,2,3,0\" data-index-in-node=\"95\">C<\/code> or <code data-path-to-node=\"3,2,3,0\" data-index-in-node=\"100\">K<\/code>). Code <code data-path-to-node=\"3,2,3,0\" data-index-in-node=\"109\">14<\/code> includes early K5 Blazers (<span class=\"math-inline\" data-math=\"115&quot;\" data-index-in-node=\"139\">$115&#8243;$<\/span> Wheelbase).<\/span><\/td><\/tr><tr><td><span data-path-to-node=\"3,3,0,0\"><b data-path-to-node=\"3,3,0,0\" data-index-in-node=\"0\">1973\u20131980<\/b><\/span><\/td><td><span data-path-to-node=\"3,3,1,0\"><b data-path-to-node=\"3,3,1,0\" data-index-in-node=\"0\">13 Digits<\/b><\/span><\/td><td><p data-path-to-node=\"3,3,2,0\"><code data-path-to-node=\"3,3,2,0\" data-index-in-node=\"0\">1st:<\/code> Division \/ Brand<\/p><br data-path-to-node=\"3,3,2,1\" \/><p data-path-to-node=\"3,3,2,2\"><code data-path-to-node=\"3,3,2,2\" data-index-in-node=\"0\">2nd:<\/code> Chassis\/Drive Type<\/p><br data-path-to-node=\"3,3,2,3\" \/><p data-path-to-node=\"3,3,2,4\"><code data-path-to-node=\"3,3,2,4\" data-index-in-node=\"0\">3rd:<\/code> Engine Code<\/p><br data-path-to-node=\"3,3,2,5\" \/><p data-path-to-node=\"3,3,2,6\"><code data-path-to-node=\"3,3,2,6\" data-index-in-node=\"0\">4th:<\/code> Series Rating<\/p><br data-path-to-node=\"3,3,2,7\" \/><p data-path-to-node=\"3,3,2,8\"><code data-path-to-node=\"3,3,2,8\" data-index-in-node=\"0\">5th:<\/code> Body Style<\/p><br data-path-to-node=\"3,3,2,9\" \/><p data-path-to-node=\"3,3,2,10\"><code data-path-to-node=\"3,3,2,10\" data-index-in-node=\"0\">6th:<\/code> Model Year<\/p><br data-path-to-node=\"3,3,2,11\" \/><p data-path-to-node=\"3,3,2,12\"><code data-path-to-node=\"3,3,2,12\" data-index-in-node=\"0\">7th:<\/code> Assembly Plant<\/p><br data-path-to-node=\"3,3,2,13\" \/><p data-path-to-node=\"3,3,2,14\"><code data-path-to-node=\"3,3,2,14\" data-index-in-node=\"0\">8th\u201313th:<\/code> Production Sequence Number<\/p><\/td><td><span data-path-to-node=\"3,3,3,0\">Pre-standardized &#8220;Square Body&#8221; era. Explictly captures Division (<code data-path-to-node=\"3,3,3,0\" data-index-in-node=\"65\">C<\/code> = Chevy, <code data-path-to-node=\"3,3,3,0\" data-index-in-node=\"76\">T<\/code> = GMC) and Body Style <code data-path-to-node=\"3,3,3,0\" data-index-in-node=\"100\">2<\/code> for open-utility utility vehicles (Blazer\/Jimmy).<\/span><\/td><\/tr><tr><td><span data-path-to-node=\"3,4,0,0\"><b data-path-to-node=\"3,4,0,0\" data-index-in-node=\"0\">1981\u20131987<\/b><\/span><\/td><td><span data-path-to-node=\"3,4,1,0\"><b data-path-to-node=\"3,4,1,0\" data-index-in-node=\"0\">17 Characters<\/b><\/span><\/td><td><p data-path-to-node=\"3,4,2,0\"><code data-path-to-node=\"3,4,2,0\" data-index-in-node=\"0\">1st\u20133rd:<\/code> World Manufacturer Identifier (WMI)<\/p><br data-path-to-node=\"3,4,2,1\" \/><p data-path-to-node=\"3,4,2,2\"><code data-path-to-node=\"3,4,2,2\" data-index-in-node=\"0\">4th:<\/code> Chassis Type<\/p><br data-path-to-node=\"3,4,2,3\" \/><p data-path-to-node=\"3,4,2,4\"><code data-path-to-node=\"3,4,2,4\" data-index-in-node=\"0\">5th:<\/code> Series \/ GVWR<\/p><br data-path-to-node=\"3,4,2,5\" \/><p data-path-to-node=\"3,4,2,6\"><code data-path-to-node=\"3,4,2,6\" data-index-in-node=\"0\">6th:<\/code> Body Configuration<\/p><br data-path-to-node=\"3,4,2,7\" \/><p data-path-to-node=\"3,4,2,8\"><code data-path-to-node=\"3,4,2,8\" data-index-in-node=\"0\">7th:<\/code> Engine Identification<\/p><br data-path-to-node=\"3,4,2,9\" \/><p data-path-to-node=\"3,4,2,10\"><code data-path-to-node=\"3,4,2,10\" data-index-in-node=\"0\">8th:<\/code> Brake \/ Restraint System<\/p><br data-path-to-node=\"3,4,2,11\" \/><p data-path-to-node=\"3,4,2,12\"><code data-path-to-node=\"3,4,2,12\" data-index-in-node=\"0\">9th:<\/code> Check Digit<\/p><br data-path-to-node=\"3,4,2,13\" \/><p data-path-to-node=\"3,4,2,14\"><code data-path-to-node=\"3,4,2,14\" data-index-in-node=\"0\">10th:<\/code> Model Year Code<\/p><br data-path-to-node=\"3,4,2,15\" \/><p data-path-to-node=\"3,4,2,16\"><code data-path-to-node=\"3,4,2,16\" data-index-in-node=\"0\">11th:<\/code> Assembly Plant<\/p><br data-path-to-node=\"3,4,2,17\" \/><p data-path-to-node=\"3,4,2,18\"><code data-path-to-node=\"3,4,2,18\" data-index-in-node=\"0\">12th\u201317th:<\/code> Sequential Production Number<\/p><\/td><td><span data-path-to-node=\"3,4,3,0\">Standardized modern formatting. WMIs beginning with <code data-path-to-node=\"3,4,3,0\" data-index-in-node=\"52\">1GC<\/code> flag Chevrolet Truck\/SUV and <code data-path-to-node=\"3,4,3,0\" data-index-in-node=\"85\">1GT<\/code> flag GMC. Character <code data-path-to-node=\"3,4,3,0\" data-index-in-node=\"109\">8<\/code> in position 6 identifies Blazer\/Jimmy models.<\/span><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-60ee661 elementor-widget elementor-widget-image\" data-id=\"60ee661\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"387\" height=\"516\" src=\"https:\/\/www.ss396.com\/cars\/wp-content\/uploads\/2026\/07\/image-9.png\" class=\"attachment-large size-large wp-image-84894\" alt=\"\" srcset=\"https:\/\/www.ss396.com\/cars\/wp-content\/uploads\/2026\/07\/image-9.png 387w, https:\/\/www.ss396.com\/cars\/wp-content\/uploads\/2026\/07\/image-9-225x300.png 225w\" sizes=\"(max-width: 387px) 100vw, 387px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-e2792df elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e2792df\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-0e78e88\" data-id=\"0e78e88\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5a9ed90 elementor-widget elementor-widget-text-editor\" data-id=\"5a9ed90\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3 data-path-to-node=\"5\">Shared Assembly Plant Codes Quick Reference<\/h3><p data-path-to-node=\"6\">When verifying your truck&#8217;s manufacturing origin, check the plant position code against these historical GM truck assembly facilities:<\/p><ul data-path-to-node=\"7\"><li><p data-path-to-node=\"7,0,0\"><b data-path-to-node=\"7,0,0\" data-index-in-node=\"0\">A:<\/b> Atlanta, Georgia<\/p><\/li><li><p data-path-to-node=\"7,1,0\"><b data-path-to-node=\"7,1,0\" data-index-in-node=\"0\">B:<\/b> Baltimore, Maryland<\/p><\/li><li><p data-path-to-node=\"7,2,0\"><b data-path-to-node=\"7,2,0\" data-index-in-node=\"0\">C:<\/b> South Gate, California \/ Cheyenne<\/p><\/li><li><p data-path-to-node=\"7,3,0\"><b data-path-to-node=\"7,3,0\" data-index-in-node=\"0\">F:<\/b> Flint, Michigan<\/p><\/li><li><p data-path-to-node=\"7,4,0\"><b data-path-to-node=\"7,4,0\" data-index-in-node=\"0\">H \/ Z:<\/b> Fremont, California<\/p><\/li><li><p data-path-to-node=\"7,5,0\"><b data-path-to-node=\"7,5,0\" data-index-in-node=\"0\">J:<\/b> Janesville, Wisconsin<\/p><\/li><li><p data-path-to-node=\"7,6,0\"><b data-path-to-node=\"7,6,0\" data-index-in-node=\"0\">K:<\/b> Kansas City, Missouri<\/p><\/li><li><p data-path-to-node=\"7,7,0\"><b data-path-to-node=\"7,7,0\" data-index-in-node=\"0\">N:<\/b> Norwood, Ohio<\/p><\/li><li><p data-path-to-node=\"7,8,0\"><b data-path-to-node=\"7,8,0\" data-index-in-node=\"0\">P \/ V:<\/b> Pontiac, Michigan<\/p><\/li><li><p data-path-to-node=\"7,9,0\"><b data-path-to-node=\"7,9,0\" data-index-in-node=\"0\">S:<\/b> St. Louis, Missouri<\/p><\/li><li><p data-path-to-node=\"7,10,0\"><b data-path-to-node=\"7,10,0\" data-index-in-node=\"0\">T:<\/b> Tarrytown, New York<\/p><\/li><li><p data-path-to-node=\"7,11,0\"><b data-path-to-node=\"7,11,0\" data-index-in-node=\"0\">1:<\/b> Oshawa, Ontario, Canada<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8f15f05 elementor-widget elementor-widget-text-editor\" data-id=\"8f15f05\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Decoding your classic Chevy or GMC truck, Blazer, or Jimmy VIN is the most reliable way to strip away decades of guesswork and find out exactly how your vehicle rolled off the assembly line. Whether you are hunting down correct replacement parts, checking the authenticity of a rare powertrain option, or documenting a total &#8220;Square Body&#8221; or &#8220;Action Line&#8221; restoration project, a clear understanding of your vehicle&#8217;s identity is important and tells part of its history.\u00a0<\/p><p>If you need more help decoding your VIN, or looking for parts for your C10, hop on <a href=\"https:\/\/www.ss396.com\/\">SS396.com<\/a> or give our friendly techs a call at (203) 235-1200!<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Looking to decode the VIN of your classic Chevrolet or GMC truck, blazer, or Jimmy? Our comprehensive classic GM truck VIN decoder is the ultimate tool for identifying your vintage rig\u2019s factory specifications. Whether you are restoring a legendary 1967\u20131972 &#8220;Action Line&#8221; pickup, verifying a 1973\u20131987 &#8220;Square Body&#8221; C10 or K10, or tracking down the [&hellip;]<\/p>\n","protected":false},"author":24,"featured_media":84891,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[216,743],"tags":[932,459,977,931,109],"class_list":["post-84880","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-article","category-tips-info","tag-c10","tag-chevy","tag-decode-vin","tag-truck","tag-vin"],"acf":[],"uagb_featured_image_src":{"full":["https:\/\/www.ss396.com\/cars\/wp-content\/uploads\/2026\/07\/Featured-1.jpg",1200,600,false],"thumbnail":["https:\/\/www.ss396.com\/cars\/wp-content\/uploads\/2026\/07\/Featured-1-150x150.jpg",150,150,true],"medium":["https:\/\/www.ss396.com\/cars\/wp-content\/uploads\/2026\/07\/Featured-1-300x150.jpg",300,150,true],"medium_large":["https:\/\/www.ss396.com\/cars\/wp-content\/uploads\/2026\/07\/Featured-1-768x384.jpg",768,384,true],"large":["https:\/\/www.ss396.com\/cars\/wp-content\/uploads\/2026\/07\/Featured-1-1024x512.jpg",800,400,true],"1536x1536":["https:\/\/www.ss396.com\/cars\/wp-content\/uploads\/2026\/07\/Featured-1.jpg",1200,600,false],"2048x2048":["https:\/\/www.ss396.com\/cars\/wp-content\/uploads\/2026\/07\/Featured-1.jpg",1200,600,false]},"uagb_author_info":{"display_name":"Tim King","author_link":"https:\/\/www.ss396.com\/cars\/author\/tim-k\/"},"uagb_comment_info":0,"uagb_excerpt":"Looking to decode the VIN of your classic Chevrolet or GMC truck, blazer, or Jimmy? Our comprehensive classic GM truck VIN decoder is the ultimate tool for identifying your vintage rig\u2019s factory specifications. Whether you are restoring a legendary 1967\u20131972 &#8220;Action Line&#8221; pickup, verifying a 1973\u20131987 &#8220;Square Body&#8221; C10 or K10, or tracking down the&hellip;","_links":{"self":[{"href":"https:\/\/www.ss396.com\/cars\/wp-json\/wp\/v2\/posts\/84880","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ss396.com\/cars\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ss396.com\/cars\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ss396.com\/cars\/wp-json\/wp\/v2\/users\/24"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ss396.com\/cars\/wp-json\/wp\/v2\/comments?post=84880"}],"version-history":[{"count":14,"href":"https:\/\/www.ss396.com\/cars\/wp-json\/wp\/v2\/posts\/84880\/revisions"}],"predecessor-version":[{"id":84898,"href":"https:\/\/www.ss396.com\/cars\/wp-json\/wp\/v2\/posts\/84880\/revisions\/84898"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ss396.com\/cars\/wp-json\/wp\/v2\/media\/84891"}],"wp:attachment":[{"href":"https:\/\/www.ss396.com\/cars\/wp-json\/wp\/v2\/media?parent=84880"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ss396.com\/cars\/wp-json\/wp\/v2\/categories?post=84880"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ss396.com\/cars\/wp-json\/wp\/v2\/tags?post=84880"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}