GMC VIN Decoder, Build Sheet and RPO Code Lookup
Your GMC VIN is the starting point for your build sheet. Use our free GMC VIN decoder below to check the model, year, engine and plant on any Sierra, Yukon, Canyon, Acadia or Terrain, then see how to get your GMC build sheet by VIN. Already have the RPO codes? Paste them into our GM RPO decoder to see exactly how your GMC was built.
Try It Yourself. Copy/Paste This GMC VIN Into Our Decoder Below: 1GKS2DKL0NR024680
VIN Decoder & Build Sheet
Check VIN identity, factory spec, recalls, complaints, and ownership risks before you buy.
Pre Purchase VIN Check
Fuel Economy, Emissions & Running Cost
EPA fuel economy for the vehicle year and model profile.
Additional Vehicle Specs
Supplementary spec matching for output such as power, transmission, size, and weight.
Recalls, Complaints & Mechanical Failures
Model level safety and complaint data for the decoded year, make, and model.
Vehicle Ownership Insights
Platform specific reliability patterns, critical engine platform audits, and pre purchase inspection guidance.
Likely Factory Option Profile
Probability model for common package combinations around this production era.
The free scan verifies identity and surfaces early risk signals. The paid report goes deeper into what those signals mean for ownership, repairs, and buying confidence.
Unlock Full VIN ReportGMC Build Sheet by VIN: Where the Codes Are Kept
A GMC build sheet is a list of GM RPO codes, the three character codes GM uses for every factory option. The VIN points to that list, but it doesn't contain it. You get the codes from one of these three places.
Service Parts Identification label
Open the glove box on most Sierras, Yukons and Acadias and you'll find a sticker with the VIN and a block of RPO codes. That block is your build sheet. Some newer GMCs don't carry the label, so check before you rely on it.
GMC dealer printout
Any Buick GMC dealer can pull the factory build record from the VIN and print every RPO code. Ask the service desk rather than sales. It's the best route when the label is missing or worn.
Original window sticker
The sticker names the trim, like SLT, AT4 or Denali, plus each package and its price. It's the easiest document to read, but it won't list the small RPO codes a build sheet does.
GMC VIN Breakdown: Read a Yukon Denali VIN
GMC uses GM's VIN layout, so character 8 tells you the engine before you open the hood. This 2022 Yukon Denali shows how each part reads.
1GKS2DKL0NR024680: 2022 GMC Yukon Denali 4WD, 6.2 V8, built in Arlington, Texas
- 1GK: country, maker and type
- 1 is the US, G is General Motors and K is a GMC SUV. A US built Sierra starts 1GT.
- S2DK: model, drive and body
- Together these say Yukon, four wheel drive and the Denali series. Our decoder turns them into plain English.
- L: engine
- L is the 6.2 V8, RPO code L87. That engine is under a major recall, so this letter matters.
- 0: check digit
- A calculated digit that catches typos and made up VINs.
- N: model year
- N is 2022.
- R: plant
- Arlington, Texas, where every Yukon is built.
- 024680: serial
- The sequence number of this one Yukon.
Sierra and Yukon engine letters, recent years
| Character 8 | Engine and RPO code |
|---|---|
| D | 5.3 V8, L84 |
| L | 6.2 V8, L87 |
| Y | 6.6 Duramax turbo diesel, L5P, Sierra HD |
GM reuses engine letters across models and years. Read the letter alongside the model year, or let the decoder do it.
GMC prefixes, characters 1 to 3
- 1GT Truck built in the US: Sierra, Canyon, Hummer EV
- 3GT Truck built in Mexico: Sierra 1500
- 1GK SUV built in the US: Yukon, Acadia
- 2GK and 3GK SUV built in Canada or Mexico: Terrain
Plant letters, character 11
- Z Fort Wayne, Indiana: Sierra 1500
- G Silao, Mexico: Sierra 1500
- F Flint, Michigan: Sierra HD
- R Arlington, Texas: Yukon and Yukon XL
- 1 Wentzville, Missouri: Canyon
Model year, character 10
- A2010
- B2011
- C2012
- D2013
- E2014
- F2015
- G2016
- H2017
- J2018
- K2019
- L2020
- M2021
- N2022
- P2023
- R2024
- S2025
- T2026
GMC and Chevrolet: Same RPO Codes, Different Names
Most GMCs have a Chevrolet twin, and both are built from the same parts list. That's why a GM RPO decoder works across both brands. The code is the same, but the name on the window sticker can change.
| GMC | Chevrolet twin | What that means for you |
|---|---|---|
| Sierra 1500 and HD | Silverado 1500 and HD | Engines, axles and towing codes match, so Silverado build data applies to your Sierra |
| Yukon and Yukon XL | Tahoe and Suburban | Same plant, same engines and the same L87 recall |
| Canyon | Colorado | Built side by side in Wentzville |
| Savana | Express | Near identical vans with different badges |
Cardinal Red
Sold on Chevrolets as Red Hot.
Onyx Black
Called plain Black on Chevrolets.
White Frost Tricoat
Chevrolet's name is Iridescent Pearl Tricoat.
Is It a Real Denali or AT4? How to Check
Denali grilles and AT4 badges are easy to bolt on, and they add real money to a used GMC. Before you pay for the badge, check three things.
Decode the VIN
The series characters in positions 4 to 7 change with the trim. If the decoder doesn't come back with the trim the seller claims, ask why.
Read the window sticker
The original sticker names the trim at the top, Denali, Denali Ultimate, AT4, AT4X, Elevation, SLT or SLE, and lists every package added to it.
Match the RPO codes
Trim level features show up on the RPO label. A Denali with cloth seats and no premium audio code is a warning sign.
GMC RPO Code Decoder
Type or paste the codes from your glove box label or dealer printout. You'll get each one back in plain English, from the engine and axle ratio to the paint.
Separate codes with spaces, commas or new lines.
Codes not in our list
Find one code
Look up an RPO code or search by feature.
Start typing to search the GMC RPO list.
Click a code to copy it. A few GM RPO codes have changed meaning over the years, so check anything important against the dealer record.
GMC Paint Codes and Colors
GM paint codes start with G and sit on the RPO label with the rest of the build sheet. These are the colors you'll see most on recent Sierras and Yukons.
GAZ
Summit White
GMC's standard white, on everything from work trucks to Denalis.
G1W
White Frost Tricoat
Pearl white, a paid upgrade.
GBA
Onyx Black
Solid black.
GAN
Quicksilver Metallic
Bright silver.
GXD
Sterling Metallic
Mid silver grey.
G9K
Satin Steel Metallic
Darker grey metallic.
GNO
Thunderstorm Gray
Solid dark grey.
GJI
Dark Sky Metallic
Charcoal metallic.
GXP
Downpour Metallic
Dark blue grey.
GA0
Pacific Blue Metallic
Mid blue.
GLT
Dynamic Blue Metallic
Brighter blue.
G6M
Titanium Rush Metallic
Warm grey with a tan tint.
GXN
Deep Bronze Metallic
Dark bronze.
GS6
Smokey Quartz Metallic
Smoky grey.
G48
Redwood Metallic
Deep brown red.
G7C
Cardinal Red
Bright solid red.
GPJ
Red Quartz Tintcoat
Deep red tintcoat.
GNT
Volcanic Red Tintcoat
Rich red tintcoat.
Swatches give you a feel for each color on screen. Match touch up paint to the code, not the swatch.
GMC Problems to Check Before You Buy
The engine letter and the RPO label tell you which of these apply to the GMC in front of you.
| Issue | Affects | How to check |
|---|---|---|
| L87 6.2 V8 engine recall | 2021 to 2024 Sierra 1500 and Yukon with the 6.2 | Character 8 is L. Run the full VIN through GMC's recall lookup and ask for proof of the inspection or engine replacement. |
| Lifter failure on cylinder deactivation V8s | 5.3 and 6.2 V8s from 2014 on | Listen for ticking or a misfire at idle and ask for lifter repair records. |
| 8 speed shudder | Sierra, Yukon and Acadia with an 8 speed, late 2010s | Feel for a shake around 25 to 50 mph. A fluid flush service is the usual fix. |
| Duramax fuel pump failure | 2011 to 2016 Sierra HD diesels | Check service records for the high pressure fuel pump. |
| 2.4 oil consumption | Terrain with the 2.4 four, around 2010 to 2017 | Check the oil level and ask how often it's topped up. |
| 3.6 V6 timing chains | Early Acadias | A check engine light with timing codes or a rattle at start up points to stretched chains. |
Recall repairs are free at any Buick GMC dealer, including on trucks bought used.
GMC RPO Code List
The GM build sheet codes in our decoder, grouped the way you'd look for them on a Sierra or Yukon.
Engines and transmissions
- L3B 2.7 turbo four, Sierra 1500 and Canyon
- L83 5.3 V8, 2014 to 2018 Sierra and Yukon
- L84 5.3 V8, later Sierra and Yukon
- L86 6.2 V8, 2014 to 2018 Sierra and Yukon
- L87 6.2 V8, later Sierra and Yukon, under recall
- L5P 6.6 Duramax turbo diesel V8, Sierra HD
- L8T 6.6 gas V8, Sierra HD
- LM2 3.0 Duramax turbo diesel six
- LZ0 3.0 Duramax turbo diesel six, later version
- LGZ 3.6 V6, Canyon
- LCV 2.5 four
- LGX 3.6 V6, Acadia
- LSD 2.0 turbo four
- MHS 10 speed automatic transmission
- MQB 10 speed automatic transmission
- M5T 8 speed automatic transmission
- M5U 8 speed automatic transmission
- MYC 6 speed automatic transmission
- K05 Engine block heater
Towing, axles and off road
- Z82 Trailering package
- NHT Max Trailering Package
- JL1 Integrated trailer brake controller
- G80 Automatic locking rear differential
- GU4 3.08 rear axle ratio
- GU5 3.23 rear axle ratio
- GU6 3.42 rear axle ratio
- GT4 3.73 rear axle ratio
- GT5 4.10 rear axle ratio
- K5L Heavy duty cooling package
- KNP Heavy duty transmission cooling
- Z71 Off road suspension package
- JHD Hill Descent Control
- V76 Front recovery hooks
- VYU Snow plow prep package
- F55 Magnetic Ride Control
- Z60 High performance suspension package
- Z85 Handling and trailering suspension package
Seats, cabin and comfort
- KA1 Heated front seats
- KB6 Heated and ventilated front seats
- KA6 Heated second row seats
- KI3 Heated steering wheel
- A50 Front bucket seats
- AZ3 Front 40/20/40 split bench seat
- ATN Second row power release bucket seats
- AG1 Power driver seat
- AG2 Power passenger seat
- CJ2 Dual zone automatic climate control
- C3U Panoramic power sunroof
- CF5 Power sunroof
- E80 Power liftgate
- K4C Wireless charging
- BTV Remote start
- UG1 Universal home remote
Tech, audio and driver assistance
- UQA Bose premium audio
- U2K SiriusXM satellite radio
- UE1 OnStar
- UV2 HD Surround Vision camera
- UVC Rear vision camera
- KSG Adaptive cruise control
- UKC Lane Change Alert with Side Blind Zone Alert
- UFG Rear Cross Traffic Alert
- UHY Automatic emergency braking
- UKJ Front pedestrian braking
- UHX Lane Keep Assist
- UD5 Front and rear park assist
- T4L LED headlamps
- T3U Front fog lamps
- DL3 Power folding heated mirrors
GMC paint codes
- GAZ Summit White
- G1W White Frost Tricoat
- GBA Onyx Black
- GAN Quicksilver Metallic
- GXD Sterling Metallic
- G9K Satin Steel Metallic
- GNO Thunderstorm Gray
- GJI Dark Sky Metallic
- GXP Downpour Metallic
- GA0 Pacific Blue Metallic
- GLT Dynamic Blue Metallic
- G6M Titanium Rush Metallic
- GXN Deep Bronze Metallic
- GS6 Smokey Quartz Metallic
- G48 Redwood Metallic
- G7C Cardinal Red
- GPJ Red Quartz Tintcoat
- GNT Volcanic Red Tintcoat
Paint codes are RPO codes too, so they show on the glove box label alongside everything else.
Common GMC Build Sheet Questions
What is the easiest way to get a GMC build sheet by VIN?
Read the RPO codes on the glove box label, or ask a Buick GMC dealer to print the factory build record from the VIN. Then decode the codes with our RPO lookup.
Does a GMC VIN decoder show the build sheet?
Not on its own. The VIN gives the model, year, engine and plant. The full build sheet is the list of RPO codes from the label or the dealer.
Can I look up RPO codes by VIN?
A GM dealer can, because they have access to the factory build record. Free VIN decoders can't, because the RPO codes aren't in the VIN.
Are GM build sheet codes the same for GMC and Chevrolet?
Yes. Both use GM's RPO system, so a Sierra and a Silverado share codes like L87, NHT and Z82. Some paint names differ between the brands.
Can a GMC VIN tell me the engine?
Yes, character 8 is the engine. On a recent Sierra 1500 or Yukon, D is the 5.3 V8 and L is the 6.2 V8.
How do I know if my GMC has the recalled 6.2 engine?
On a 2021 to 2024 Sierra 1500 or Yukon, an L in character 8 or L87 on the RPO label means the 6.2. Check the full VIN for open recalls.
Where do I find the RPO codes on my GMC?
Usually on the inside of the glove box door or the glove box wall. Some newer models don't have one, so use a dealer printout instead.
How do I find my GMC paint code?
On the RPO label, as a code starting with G, like GAZ for Summit White or GBA for Onyx Black.
Where is the VIN located on a GMC?
At the base of the windshield on the driver side, on the driver door jamb label, and on your title and registration.
Dale Ogden
Dale has spent more than 20 years in vehicle valuations, forecasting and asset management. He was a Forecast Manager at CAP HPI, the UK's leading vehicle valuation authority and a counterpart to Kelley Blue Book.
He helped pioneer early electric vehicle depreciation models adopted by major manufacturers, and his residual value forecasts cover more than 10,000 vehicles. Today his data led insights help buyers, enthusiasts and automotive professionals around the world.
What's Your GMC's Spec Worth Today?
Denali, AT4 and the Max Trailering Package all move the price of a used GMC. See what the options on yours add up to.
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More GM VIN Decoders
GMC shares its RPO codes with every GM brand, so these guides fill in the gaps.
Unlock accurate valuations for your car’s features in seconds – find out what your options are worth today and in the future.
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