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1GBChevrolet incomplete vehicles (chassis)

Held by General Motors LLC · registered in the United States

WMI 1GB's rules place assembly in three countries. Its rules start at model year 1981 and have no end year. The same rules name 15 percent of the 313 models found under all 108 codes of General Motors. Electrified versions appear in its rules: battery electric, hybrid and mild hybrid.

Models in the decoding rules, by model year

  1. Aluminum Tilt1981–1988
  2. Blazer1981–2001
  3. Bus Chassis1981–1988
  4. C/K Pickup1981–1986
  5. C51981–2009
  6. C61981–2009
  7. C71981–2009
  8. Forward Control1981–1990
  9. G-Series1981–1996
  10. Heavy Conventional1981–1988
  11. P - Series1981–1993
  12. Suburban1981–2001
  13. S-10 Blazer1982–1995
  14. S-10 Pickup1982–2001
  15. Military Truck1983–1987
  16. Astro Van1985–2005
  17. GMT-4001987–2001
  18. R Conventional1987–1991
  19. V Conventional1987–1991
  20. S61989–1991
  21. S71989–1993
  22. Cutaway Chassis1990–1997
  23. Lumina APV1990–1996
  24. Motorhome Chassis1990–1999
  25. B71991–2002
  26. P6S1991–1996
  27. Cutaway Van1992–1993
  28. D71994–1996
  29. P Truck Forward1994–1999
  30. Express1997–2027
  31. T-Series1997–2009
  32. Tahoe1997–2026
  33. Silverado1999–2027
  34. 3 ton2001–2004
  35. Venture2002–2005
  36. C42003–2009

Also in the rules (10 more): C8, Colorado, Uplander, Avalanche, Equinox, HHR, Bolt Incomplete, Silverado HD, Silverado LTD, Traverse.

Where the rules place assembly

Plant countriesUnited States, Mexico, Canada

Plant locations namedFlint; Wentzville; Arlington; Shreveport; Pontiac; Moraine; Janesville; Fort Wayne; Linden; Roanoke; Oklahoma City; Doraville; Lansing; Detroit and 28 more

Bodies and power

Body classesSUV, Incomplete, Chassis cab, Cargo Van, Incomplete - Cutaway, Incomplete - Motor Home Chassis, Pickup, Chassis cab (single), Van, Truck

Primary fuelsGasoline, Diesel, Flexible Fuel Vehicle (FFV), Electric, Liquefied Petroleum Gas (propane or LPG), Compressed Natural Gas (CNG)

Compared with the closest code, 1GC

1GC is held by General Motors LLC. Measured by the overlap of the two model lists, it is the code closest to 1GB.

Models in both37

Only under 1GBCutaway Van, D7, P Truck Forward, T-Series, C4, C8, Uplander, Bolt Incomplete, Traverse

Only under 1GCEl Camino, Hi-Cube, SSR

Model years1GB: 1981–open · 1GC: 1981–open

Body classes only for 1GBChassis cab (single), Chassis cab (double), Incomplete - Commercial Bus Chassis, Hatchback

Vehicle type1GB: incomplete vehicles (chassis) · 1GC: trucks

Other codes held by General Motors

CodeVehicle typeMakesModel yearsModels
1GDincomplete vehicles (chassis)GMC1981–open39
2GBincomplete vehicles (chassis)Chevrolet1981–201928
1GEincomplete vehicles (chassis)Cadillac1981–open17
2GDincomplete vehicles (chassis)GMC1981–201916
4KLincomplete vehicles (chassis)Isuzu1992–201015
3GBincomplete vehicles (chassis)Chevrolet1995–open13
3GDincomplete vehicles (chassis)GMC, Saab1995–open8
4GLincomplete vehicles (chassis)Buick1988–20087

99 more not shown here. All 108 codes of General Motors

Chevrolet under other holders

Models named in each code's rules

  1. 1HT International Motors, LLCUnited States400
  2. 5WE IC Bus, LLCUnited States226
  3. 1HA International Motors, LLCUnited States109
  4. JAL Isuzu Motors Limited, JapanJapan38
  5. 4VZ The Shyft Group, Inc.United States31
  6. 54D The Shyft Group, Inc.United States26
  7. J81 Isuzu Motors Limited, JapanJapan21
  8. 1Y1 New United Motor Manufacturing, Inc.United States17

Source: NHTSA vPIC, October 2026 release (database updated October 17, 2026). How the figures are counted: How the catalog is read.