Technical Service Bulletin RCL/91C50 — 1991 GMC C SERIES(LIGHT)
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL
Bulletin Details
| TSB ID | RCL/91C50 |
| Manufacturer | |
| Vehicle | 1991 GMC C SERIES(LIGHT) |
| Component | ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL |
| Communication Date |
Bulletin Summary
CALIFORNIA RECALL - GENERAL MOTORS HAS DETERMINED THAT CERTAIN 1991 C/K TRUCKS, M/L AND G VANS WITH 4.3L ENGINES MAY BE EMITTING NON-METHANE HYDROCARBONS IN EXCESS OF CALIFORNIA EMISSION STANDARDS. TO CORRECT THIS CONDITION, DEALERS ARE TO INSTALL A NEW EXHAUST OXYGEN SENSOR. *TW
About Technical Service Bulletins
A Technical Service Bulletin (TSB) is a document issued by a vehicle manufacturer to its dealers, describing a known issue with a specific vehicle or set of vehicles and the recommended procedure to fix it. Unlike recalls, TSBs are not mandatory and are typically only performed if an owner reports the related issue. However, TSBs can be an indicator of common problems with a vehicle.