The defect
CERTAIN MEDIUM DUTY C-SERIES AND B7 SCHOOL BUS CHASSIS EQUIPPED WITH A 7.4 LITER GAS ENGINE AND AN IMPCO LPG CONVERSION KIT. SOME OF THESE VEHICLES MAY HAVE ENGINE BACKFIRES WITH SUFFICIENT FORCE TO DAMAGE THE ENGINE AIR INTAKE SYSTEM AND THE AIR CLEANER FILTER ELEMENT.
The risk
IF THE DAMAGED AIR CLEANER PARTS ARE DISLODGED FROM THEIR NORMAL POSITION, THESE PARTS COULD COME IN CONTACT WITH THE HOT EXHAUST MANIFOLD AND/OR HOT EXHAUST GAS RECIRCULATION (EGR) VALVE TUBE RESULTING IN A POSSIBLE ENGINE COMPARTMENT FIRE.
The remedy
DEALERS WILL INSTALL A REDESIGNED MIXER BONNET AND AIR CLEANER HOUSING COVER, SELECTIVE UPGRADES IN VARIOUS CONNECTIONS RELATED TO THE AIR INDUCTION SYSTEM, AND IF NEEDED, A NEW AIR CLEANER FILTER. OWNER NOTIFICATION BEGAN DECEMBER 18, 2002. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT CHEVROLET AT 1-800-222-1020 OR GMC AT 1-800-462-8782.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Chevrolet C6500 | 1999, 2000 |
| Chevrolet C7500 | 1999, 2000 |
| GMC B7 | 2000 |
| GMC C6500 | 1999, 2000 |
| GMC C7500 | 1999, 2000 |
Components: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Chevrolet C6500 | 1999 | 1 | 4 |
| Chevrolet C6500 | 2000 | 0 | 3 |
| Chevrolet C7500 | 1999 | 0 | 4 |
| Chevrolet C7500 | 2000 | 2 | 3 |
| GMC B7 | 2000 | 0 | 3 |
| GMC C6500 | 1999 | 0 | 4 |
| GMC C6500 | 2000 | 1 | 3 |
| GMC C7500 | 1999 | 1 | 4 |
| GMC C7500 | 2000 | 0 | 3 |
Other engine and engine cooling recalls in 2002
11 of the 434 recall campaigns reported to NHTSA in 2002 concerned the engine and engine cooling; GENERAL MOTORS CORP. filed 1,195 campaigns in all.
| 02V342000 30 Dec 2002 | TRAVEL SUPREME, INC. |
| 02V325000 6 Dec 2002 | GILLIG CORPORATION |
| 02V211002 19 Sept 2002 | BLUE BIRD BODY COMPANY |
| 02V240000 13 Sept 2002 | SUBARU OF AMERICA, INC. |
| 02V226000 28 Aug 2002 | AMERICAN HONDA MOTOR CO. |
| 02V204000 26 Jul 2002 | INTERNATIONAL TRUCK AND ENGINE |
| 02V138000 16 May 2002 | BAYERISCHE MOTOREN WERKE |
| 02V111000 11 Apr 2002 | HYUNDAI CARIBBEAN-PUERTO RICO |
NHTSA recalls (public domain) · all recalls of 2002