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Service bulletin 3186

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 id10011037
Published by NHTSA2004-12-27
Manufacturer's number3186
NHTSA componentENGINE AND ENGINE COOLING:ENGINE

NHTSA's summary

GASOLINE ENGINE MAINTENANCE INFORMATION - AMERICAN PETROLEUM INSTITUTE GF-4 OIL - ALL 05 GENERAL MOTORS <A TITLE="CLICK FOR MORE INFORMATION ABOUT CAR" STYLE="TEXT-DECORATION: NONE; BORDER-BOTTOM: MEDIUM SOLID GREEN;" HREF="HTTP://SEARCH.TARGETWORDS.COM/U.SEARCH?X=5977|1||||CARS|AA1VDW">CAR</A>S AND LIGHT DUTY TRUCKS WITH GASOLINE ENGINES. *TT

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
UNKNOWN UNKNOWN

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