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Service bulletins for the 1991 GMC C7

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

4 on file from NHTSA, as of 2026-10-19.

By type

By component

Bulletins, newest first
0108430022001-05-29. Service bulletin. VISIBILITY:WINDSHIELD WIPER/WASHER. SOME CUSTOMERS MAY COMMENT THAT THE WINDSHIELD (W/S) WASHER RESERVOIR SHOWS AN UNEXPLAINED REDUCED FLUID LEVEL AFTER VEHICLE OPERATION. *TT
0007310012000-12-29. Service bulletin. POWER TRAIN:CLUTCH ASSEMBLY. EXPERIENCING NOISY RELEASE BEARING, SLIPPING CLUTCH OR INOERATIVE CLUTCH. *TT
9802676121B1998-05-05. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. COMMENTS ON ENGINE EXHAUST NOISE WHICH IS NORMALLY LOUDEST DURING COLD ENGINE OPERATION. *YC
988311101998-05-01. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. VEHICLES WITH 6.0L AND 7.0L ENGINES (VINS P, M - RPOS LS0, LR0) MAY EXHIBIT ENGINE EXHAUST NOISE WHICH IS LOUDEST DURING COLD ENGINE OPERATION. *YC

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.