To decode a Ram or older Dodge Ram truck VIN, read 1C6 as a US-built FCA truck (the Ram 1500s we tested), 3C6 as a Mexico-built truck (the 2500 and 3500 pickups we tested), 3C7 as a Mexico-built incomplete vehicle like a chassis cab, and 1D7 or 3D7 as the older Dodge-era codes. Position 4 carries the GVWR class, position 8 is the engine (T for the 5.7 Hemi and L for the 6.7 Cummins diesel on the trucks we tested), 10 is the model year, and 11 is the plant. Once the build checks out, run recalls and a history report, because work trucks hide a lot.
As of mid October 2026, the engine is the first claim we check on any used Ram, since a Ram can have a Pentastar V6, a Hemi, an EcoDiesel, or a Cummins depending on model and year. The VIN settles most of that in a minute, and it costs nothing. Every code below came out of NHTSA's free vPIC decoder when we tested it this week. For the general layout, start with how to decode a VIN.
Positions 1-3: Ram, Dodge, and the Mexico prefixes
The World Manufacturer Identifier on a Ram tells you the country and the vehicle type. In vPIC, 1C6 is FCA US LLC, truck. 3C6 and 3C7 are listed under Chrysler de Mexico Toluca, truck and incomplete vehicle, even though the heavy-duty pickups we decoded with those prefixes were built in Saltillo, Coahuila. That label confuses people, so trust the plant field over the WMI name. Older trucks use 1D7 (FCA US, Dodge truck) and 3D7 (Mexico, Dodge truck). Make naming shifts too: a 2012 pattern still decoded as Dodge Ram, while a 2016 pattern came back as Ram 1500.
Position 4: GVWR class, which tells you 1500 vs heavy duty
Federal rules require a truck VIN to encode the make, line, series, chassis, cab type, engine, brake system, and gross vehicle weight rating, per 49 CFR 565.15. Ram uses position 4 for the GVWR class. We checked by changing only that character. On a 2019 Ram 1500 pattern, R came back as Class 2E (6,001-7,000 lb), S as Class 2F (7,001-8,000 lb), and T as Class 2G. On 2500 and 3500 patterns, U was Class 2H (9,001-10,000 lb) and 3 was Class 3 (10,001-14,000 lb). Every one listed hydraulic brakes.
GVWR is the maximum loaded weight the truck is rated for, so it frames payload and towing. A truck sold as a 3500 with a 2500's GVWR code is either mislabeled or not the truck in the ad.
Positions 5-8: series, cab, and the engine letter
The middle characters carry series, drive, and cab details, and vPIC turns them into plain words, such as crew cab with short bed on our 1500 tests. Position 8 is the one to stare at. In our decodes, T was the 5.7-liter Hemi V8 on 2016, 2019, 2024, and 2026 Ram 1500 patterns. M was the 3.0-liter EcoDiesel. J was the 6.4-liter Hemi on a 2019 2500, and L was the 6.7-liter diesel, which vPIC lists with Cummins as the engine maker. A 2022 TRX pattern showed 9 for the supercharged 6.2. On Dodge-era trucks the letters differ: a 2005 1500 decoded D as the 5.7 and N as the 4.7, and a 2005 2500 decoded C as a 5.9-liter high-output diesel.
The 2026 Hemi detail matters for shoppers right now. Car and Driver reported that Ram brought back the 395-hp 5.7 for the 2026 Ram 1500 after dropping it, so a 2025 1500 listed as a Hemi deserves a VIN check before you believe it. On the heavy-duty side, Car and Driver's Ram 2500 page lists the 6.4 Hemi as standard and the Cummins inline-six as the diesel option.
Position 9 check digit, then 10 and 11
The check digit catches typos and sloppy fakes. A dummy 2019 Ram 1500 pattern, 1C6SRFFT0KN000001, passed in vPIC. Change only the engine letter from T to M, the kind of edit that would "turn" a Hemi into a diesel on paper, and the check digit fails. Change only the plant letter and it fails too. A cloned VIN copied from a real truck passes, so read how to spot VIN cloning.
Position 10 is the year (K for 2019, L 2020, M 2021, N 2022, P 2023, R 2024, S 2025, T 2026). Position 11 is the plant: our decodes returned S for Warren, Michigan (our 2010, 2012, 2016, and one 2019 1500 pattern), N for Sterling Heights, Michigan (2019, 2021, 2024, and 2026 1500 patterns), and G for Saltillo (2500, 3500, and chassis cabs).
Recalls and history on a Ram
Some Ram recalls are small and scattered, so check the exact VIN. Recall 25V-010 covers rupture-prone curtain airbag inflators in 6,066 trucks across 2016-2019 Ram 1500 and 3500 and 2016-2020 Ram 2500, per the Part 573 report, with VINs listed as not sequential. Recall 19V-051 involved just 15 2019 Ram 1500s built with a 12-inch screen and base HVAC that left them without working defrost, according to the NHTSA filing, and the remedy was a repurchase. Buybacks are worth knowing about when they resurface; see buyback title brands. Our recall check by VIN guide covers the lookup.
Diesel Rams often get worked hard. Fleet use, towing, tuning, and engine swaps never show in a decode. Our Cummins used truck history guide goes deeper, and the Power Stroke and Duramax versions help if you are cross-shopping. As of mid October 2026, a CARFAX report through us is about $5.50 as a guest or $4.50 as a member, and a CARFAX plus AutoCheck bundle is about $6.75, against roughly $39.99 to $44.99 at retail. Confirm at checkout. We are a licensed CARFAX and AutoCheck reseller, not affiliated with CARFAX, AutoCheck, or Experian.
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