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Service bulletin 98831110

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 id600270
Published by NHTSA1998-05-01
Manufacturer's number98831110
Manufacturer's date1998-02-01
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM

NHTSA's summary

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 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, Exhaust and emissions

Vehicles listed
CHEVROLET B71991, 1992, 1993, 1994, 1995
CHEVROLET C61991, 1992, 1993, 1994, 1995
CHEVROLET C71991, 1992, 1993, 1994, 1995
CHEVROLET P1995
CHEVROLET P SERIES1991, 1992, 1993, 1994
CHEVROLET P SERIES1995
GMC B71991, 1992, 1993, 1994, 1995
GMC C61991, 1992, 1993, 1994, 1995
GMC C71991, 1992, 1993, 1994, 1995
GMC P SERIES1991 to 1995

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

Other bulletins for the same vehicles and component
1300890092023-12-11. Service bulletin. Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
000601023A2002-03-25. Service bulletin. INFORMATION USED WHEN DIAGNOSING NOISE CONDITIONS SUCH AS ENGINE RATTLE NOISE, SPARK KNOCK AT 2000 - 2500 RPM RANGE, UNDER A MODERATE TO HEAVY LOAD WITH A WARMED UP ENGINE. *TT
0006040022000-04-06. Service bulletin. SUBJECT REGARDING A HARD, NO START OR EXCESSIVE GRAY OR WHITE SMOKE CONDITION ON START UP AFTER RECENT GLOW PLUG REPLACEMENT. *TT
7763061998-05-14. Service bulletin. COMMENTS OF A NO START, STALL CONDITION. *YC
9802676121B1998-05-05. Service bulletin. COMMENTS ON ENGINE EXHAUST NOISE WHICH IS NORMALLY LOUDEST DURING COLD ENGINE OPERATION. *YC
3761051995-11-01. Service bulletin. COLD ENGINE KNOCK. *TW
376602A1995-03-06. Service bulletin. NEW CAST IRON EXHAUST MANIFOLD AND STAINLESS STEEL GASKET TO CORRECT ENGINE NOISE CONDITION. *TW
942361995-01-11. Service bulletin. LETTER TO DEALERS EXPLAINING GENERAL MOTORS POSITION WITH CAMPAIGN 94C57. *TW