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Service bulletin 99105

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 id6092325
Published by NHTSA2000-12-05
Manufacturer's number99105
Manufacturer's date1999-04-20
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:GASOLINE

NHTSA's summary

SOME J-CAR AND S-TRUCK MODELS MAY EXHIBIT INCREASED OIL CONSUPTION ON ENGINE BUILT BEFORE OCTOBER 27, 1997. *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
CHEVROLET CHEVROLET1998
GMC GMC1998
PONTIAC PONTIAC1998

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