GM VIN positions in the 2026 filing
GM's model year 2026 filing covers 23 GM models (Cadillac: CT4, CT5, CELESTIQ, Escalade, XT5, ESCALADE IQ, LYRIQ, OPTIQ, VISTIQ; Buick: Enclave, Encore GX, Envision, Envista; GMC: Acadia, Canyon, Savana, Sierra, Sierra HD, Terrain, Yukon, Hummer EV Pickup, Hummer EV SUV, Sierra EV) with 347 codes.
Layout used by CT4, CT5, CELESTIQ
Model identified by positions 4-5 with the first 3 characters.
| Pos. | What it encodes | Example: Cadillac CT4 |
|---|---|---|
| 1-3 | Maker code (WMI) | 1G6 = General Motors, Cadillac Passenger Car |
| 4-5 | Vehicle line and series | DA = D, Cadillac CT4 Luxury RWD |
| 6 | Body style | 5 = 69 - Sedan, 4 - Door, 4 Window, Notchback |
| 7 | Restraint system | R = AYG - Active Manual Belts, Airbags-Driver & Passenger-Front (1st row), Front Seat Side (1st row), Roof Side (all seating rows), Knee(s) (1st row) |
| 8 | Engine type | K = LSY - ENGINE GAS, 4 CYL, L4, 2.0L, SIDI, DOHC, VVT, ALUM, TURBO, VAR. 3 |
| 9 | Check digit | calculated from the other 16 |
| 10 | Model year | T = 2026 |
| 11 | Assembly plant | 0 = Lansing - Grand River |
| 12-17 | Serial number |
Layout used by Enclave, Encore GX, Envision, Envista, Escalade, XT5, Acadia, Canyon, Savana, Sierra, Sierra HD, Terrain, Yukon, ESCALADE IQ, LYRIQ, OPTIQ, VISTIQ, Hummer EV Pickup, Hummer EV SUV, Sierra EV
Model identified by positions 4 and 5-6 with the first 3 characters.
| Pos. | What it encodes | Example: Buick Enclave |
|---|---|---|
| 1-3 | Maker code (WMI) | 5GA = General Motors, Buick MPV |
| 4 | GVWR, brake system, body style | E = Class E: 6,001-7,000, Hyd., 56 - Four (4) Door Cab/Utility Extended |
| 5-6 | Chassis and series | RA = R, Buick Enclave Preferred FWD |
| 7 | Restraint system | K = ASD - Active Manual Belts, Airbag - Driver & Passenger - Front (1st row), Front Seat Side (1st Row), Front Inboard Seat Side (1st row), Roof Side (all seating rows) |
| 8 | Engine type | S = LK0 - ENGINE GAS, 4 CYL, 2.5L, L4, DI, DOHC, ALUM, TURBO |
| 9 | Check digit | calculated from the other 16 |
| 10 | Model year | T = 2026 |
| 11 | Assembly plant | J = Lansing - Delta Township |
| 12-17 | Serial number |
This page lists the codes for GMC, Buick and Cadillac. The decoder reads Chevrolet VINs too; the Chevrolet tables are on the Chevy VIN decoder page.
GM engine codes, position 8
39 engines across 23 models; a code is valid only with the models listed next to it.
| Code | Engine as printed | Models |
|---|---|---|
| K | LSY - ENGINE GAS, 4 CYL, L4, 2.0L, SIDI, DOHC, VVT, ALUM, TURBO, VAR. 3 | Cadillac CT4, Cadillac CT5 |
| L | L3B - ENGINE GAS, 4 CYL, L4, 2.7L, SIDI, VVT, TURBO, DOHC, ALUM | Cadillac CT4 |
| P | LF4 - ENGINE GAS, 6 CYL, 3.6L, GEN 1+, V6, SIDI, DOHC, VVT, ALUM, TWIN TURBO | Cadillac CT4 |
| W | LGY - ENGINE GAS, 6 CYL, 3.0L, V6, DI, DOHC, VVT, ALUM, TWIN TURBO, GEN 2, VAR. 2 | Cadillac CT5 |
| 6 | LT4 - ENGINE GAS, 8 CYL, 6.2L, DI, SC, AFM, VVT, ALUM, GMNA | Cadillac CT5 |
| 1 | X0E + EXN - ELECTRIC BEV, GEN 3, RWD, PAWD, 16-MOD | Cadillac CELESTIQ |
| 2 | X0E + EHT - ELECTRIC BEV, GEN 3, RWD, PAWD, 16-MOD, CONFIG B | Cadillac CELESTIQ |
| S | LK0 - ENGINE GAS, 4 CYL, 2.5L, L4, DI, DOHC, ALUM, TURBO | Buick Enclave, Acadia |
| L | L3T - ENGINE GAS, 3 CYL, L3, 1.3L, SIDI, DOHC, VVT, ALUM, TURBO | Buick Encore GX |
| P | LBP - ENGINE GAS, 3 CYL, L3, 1.2L, DI, DOHC, DVCP, TURBO, E15-E85, GEN 1 | Buick Encore GX, Buick Envista |
| 4 | LSY - ENGINE GAS, 4 CYL, L4, 2.0L, SIDI, DOHC, VVT, ALUM, TURBO, VAR. 3 | Buick Envision |
| 2 | LIH - ENGINE GAS (E0-15), 3 CYL, 1.2L, DI, L3, DOHC, VVT, TURBO, ALUM, CSS PRIME | Buick Envista |
| L | L87 - ENGINE GAS, 8 CYL, V8, 6.2L, DI, DFM, ALUM, GEN 5 | Cadillac Escalade, Sierra, Yukon |
| 9 | LT4 - ENGINE GAS, 8 CYL, 6.2L, DI, SC, AFM, VVT, ALUM, GMNA | Cadillac Escalade |
| S | LGX - ENGINE GAS, 6 CYL, 3.6L, V6, DI, DOHC, VVT, ALUM, GEN 2 | Cadillac XT5 |
| 4 | LSY - ENGINE GAS, 4 CYL, L4, 2.0L, SIDI, DOHC, VVT, ALUM, TURBO, VAR 3 | Cadillac XT5 |
| K | L3B - ENGINE GAS, 4CYL, L4, 2.7L, SIDI, VVT, TURBO, DOHC, ALUM | Canyon |
| P | LV1 - ENGINE GAS, 6 CYL, 4.3L, GEN 5, SIDI, V6, VVT, OHV, ALUM | Savana |
| 7 | L8T - ENGINE GAS, 8 CYL, 6.6L, SIDI, VVT, CAST IRON | Savana, Sierra HD |
| D | L84 - ENGINE GAS, 8 CYL, 5.3L, V8, DI, DFM, ALUM, GEN 5 | Sierra, Yukon |
| K | L3B - ENGINE GAS, 4 CYL, L4, 2.7L, SIDI, VVT, TURBO, DOHC, ALUM | Sierra, Yukon |
| 8 | LZ0 - ENGINE DIESEL, 6 CYL, 3.0L, CRI, L6, DOHC, TURBO, VGT, ALUM, CSS50V, VAR. 2 | Sierra, Yukon |
| Y | L5P - ENGINE DIESEL, 8 CYL, 6.6L, DI, V8, TURBO, DURAMAX, GEN 5, VAR. 1 | Sierra HD |
| G | LSD - ENGINE GAS, 4 CYL, L4, 1.5L, DI, DOHC, DVVT, TURBO, GEN 1, GMNA | Terrain |
| F | XRJ+EEW - ELECTRIC, BET, EAWD, 2-MOTOR SYSTEM, 165 -175 KWH | Cadillac ESCALADE IQ, Hummer EV Pickup |
| L | XRJ + ETN - ELECTRIC, BET, EAWD, 2-MOTOR SYSTEM, 24-MOD | Cadillac ESCALADE IQ |
| K | X0D+EC6 - ELECTRIC BEV, GEN 3, RWD, 12-MOD | Cadillac LYRIQ |
| L | X0E+EC6 - ELECTRIC BEV, GEN 3, POUCH, RWD, PAWD, 12-MOD | Cadillac LYRIQ, Cadillac VISTIQ |
| 3 | X0E+ECT - ELECTRIC BEV, GEN 3, CAN, RWD, PAWD, 12-MOD | Cadillac LYRIQ, Cadillac VISTIQ |
| 4 | X0E+ER3 - ELECTRIC, BEV, GEN 3, RWD, PAWD, POUCH, LI, 10-MOD, 85KWH, 200-336V, CONFIG A | Cadillac OPTIQ |
| 5 | X0D+ER3 - ELECTRIC, BEV, GEN 3, RWD, POUCH, LI, 10-MOD, 85KWH, 200-336V, 10-MOD, CONFIG A | Cadillac OPTIQ |
| A | XRL+ETN - ELECTRIC, BET, EAWD, 3-MOTOR SYSTEM 24-MOD | Hummer EV Pickup |
| B | XRL+ETI - ELECTRIC, BET, EAWD, 3-MOTOR SYSTEM 20-MOD | Hummer EV Pickup |
| D | XRJ+ETI - ELECTRIC, BET, EAWD, 2-MOTOR SYSTEM 20-MOD | Hummer EV Pickup |
| C | XRL+ETJ - ELECTRIC, BET, EAWD, 3-MOTOR SYSTEM, 20-MOD | Hummer EV SUV |
| E | XRJ+ETJ - ELECTRIC, BET, EAWD, 2-MOTOR SYSTEM, 20-MOD | Hummer EV SUV |
| D | XRJ+ETI - ELECTRIC, BET, EAWD, 2-MOTOR SYSTEM, 20-MOD | Sierra EV |
| H | XRJ+EWX - ELECTRIC, BET, EAWD, 2-MOTOR SYSTEM, 14-MOD | Sierra EV |
| L | XRJ+ETN - ELECTRIC, BET, EAWD, 2-MOTOR SYSTEM, 24-MOD | Sierra EV |
GM maker codes (first 3 characters)
| Code | Manufacturer | Type |
|---|---|---|
| 1G6 | General Motors | Cadillac Passenger Car |
| 1GD | General Motors | GMC Incomplete |
| 1GE | General Motors | Cadillac Incomplete |
| 1GJ | General Motors | GMC Bus (Non School Bus) |
| 1GK | General Motors | GMC MPV |
| 1GT | General Motors | GMC Truck |
| 1GY | General Motors | Cadillac MPV |
| 2GT | General Motors | GMC Truck |
| 3GD | General Motors | GMC Incomplete |
| 3GK | General Motors | GMC MPV |
| 3GT | General Motors | GMC Truck |
| 3GY | General Motors | Cadillac MPV |
| 5GA | General Motors | Buick MPV |
| 7GZ | International Motors, LLC | GMC Incomplete (International Motors, LLC Only) |
| KL4 | GM Korea | Buick MPV |
| LRB | SAIC GM | Buick MPV |
GM plant codes (position 11)
| Code | Assembly plant |
|---|---|
| 0 | Lansing - Grand River |
| A | Artisan Center - Warren MI |
| U | Artisan Center |
| J | Lansing - Delta Township |
| B | Bupyeong |
| D | Dong Yue |
| R | Arlington |
| Z | Springhill |
| 1 | Wentzville |
| N | Springfield (International Motors, LLC) |
| G | Silao |
| F | Flint |
| L | San Luis Potosi |
| S | Ramos Arizpe |
Source
"26MY GMNA VIN Standards - Rev 9.0.pdf" (2026-06-30) (General Motors LLC, NHTSA Manufacturer Information Database, retrieved October 2, 2026). Older years and general VIN rules: VIN decoder. Not affiliated with General Motors LLC.
Questions
How do I decode a GM VIN?
Enter all 17 characters. Take the made-up example 1G6DA5RK8T0100001: positions 4 to 5 (DA) give D, Cadillac CT4 Luxury RWD, so it reads as a 2026 Cadillac CT4.
Which VIN character is the engine code on a GM?
Position 8. On a model year 2026 Cadillac CT4, K is LSY - ENGINE GAS, 4 CYL, L4, 2.0L, SIDI, DOHC, VVT, ALUM, TURBO, VAR. 3. Read it together with the model: codes differ between models and years.
What does 1G6 mean on a VIN?
1G6 is General Motors, Cadillac Passenger Car.
Which plant built my GM?
Position 11 is the plant. In the model year 2026 filing: 0 is Lansing - Grand River; A is Artisan Center - Warren MI; U is Artisan Center.