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Service bulletin 376105

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id39304
Published by NHTSA1995-11-01
Manufacturer's number376105
Manufacturer's date1995-02-01
Replaces93-6A-111
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:GASOLINE

NHTSA's summary

COLD ENGINE KNOCK. *TW

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine

Vehicles listed
CHEVROLET ASTRO1990 to 1994
CHEVROLET C SERIES(LIGHT)1990 to 1994
CHEVROLET G SERIES1990, 1991, 1992, 1993, 1994
CHEVROLET P SERIES1990, 1991, 1992, 1993, 1994
CHEVROLET S101990 to 1994
CHEVROLET SUBURBAN1990, 1991, 1992, 1993, 1994
GMC C SERIES(LIGHT)1990 to 1994
GMC G SERIES1990 to 1991
GMC G SERIES1993
GMC JIMMY1990, 1991
GMC JIMMY1992 to 1994
GMC P SERIES1990 to 1994
GMC SAFARI1990, 1991, 1992, 1993, 1994
GMC SUBURBAN1990, 1991, 1992, 1993, 1994
OLDSMOBILE BRAVADA1991, 1992

Listing a model year does not mean every vehicle of it is concerned: the document says which.

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96067A1997-08-21. Service bulletin. SPECIAL POLICY ADJUSTMENT - LINEAR EXHAUST GAS RECIRCULATION SYSTEM. *TW
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RCL/91C501995-11-01. Service bulletin. RECALL 91-C-50 - GENERAL MOTORS HAS DETERMINED THAT CERTAIN 1991 CHEVRTOLET C/K TRUCKS, M/L AND G VANS EQUIPPED WITH 4.3L ENGINES [RPO LB4 OR RPO LU2 (M VAN ONLY)] MAY BE EMITTING NON-METHANE HYDROCARBONS (NMHC) IN EXCESS OF CALIFORNIA EMISSIONS STANDARDS. CALIFORNIA EMISSIONS STANDARDS WERE ESTABLISHED TO PROTECT THE PUBLIC HEALTH AND WEALFARE FROM DANGERS OF AIR POLLUTION. EXCESS EMISSION OF NMHC MAY CAUSE A VEHICLE TO FAIL STATE MANDATED EMISSION TESTS. TO CORRECT THIS CONDITION, DEALERS ARE TO INSTALL A NEW OXYGEN SENSOR. *TW