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Service bulletins for the 1998 GMC Sonoma

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.

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

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Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
1300890092023-12-11. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM). Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
PI09692018-06-04. Service bulletin. ENGINE AND ENGINE COOLING; EQUIPMENT. This preliminary informational bulletin provides information on High Oil Pressure on Startup After Engine Replacement Concern.
0406030022005-03-11. Service bulletin. ENGINE AND ENGINE COOLING. DIAGNOSTIC INFORMATION FOR INTERMITTENT VEHICLE NO CRANK DEAD BATTERY. *EH
0406050012005-01-03. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SERVICE ENGINE SOON (SES) LIGHT ILLUMINATED, DIAGNOSTIC TROUBLE CODE P0420 SET. *TT
30812004-11-17. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SERVICE ENGINE SOON LIGHT AND P0300 WHEN TOWING, CRUISING UPHILL OR ON HARD ACCELERATION. *TT
012252004-07-08. Service bulletin. ENGINE AND ENGINE COOLING. ENGINE COOLANT LEAK AT INTAKE GASKET. * MJ
017272004-04-30. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. 4.3 L35 LU3 RATTLE OR BUZZ NOISE FROM ENGINE. SIT BULLETIN 1457619. *TT
030601024A2003-12-02. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. RATTLE NOISE IN ENGINE. *TT
990602012D2002-09-28. Service bulletin. ENGINE AND ENGINE COOLING. SUBJECT REGARDING RUST IN COOLING SYSTEM, HEATER INOPERATIVE, BLOWS COLD AIR, ENGINE OVERHEATS (FLUSH COOLING SYSTEM). NLM
0908012001-11-20. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. CUSTOMERS MAY COMPLAIN OF EXCESSIVE OIL CONSUMPTION AND HAVING TO ADD OIL BETWEEN CHANGES. *JG
990602012C2001-10-26. Service bulletin. ENGINE AND ENGINE COOLING. SOME CUSTOMERS MAY COMMENT THAT THE HEATER IS INOPERATIVE, BLOWS COLD AIR, ENGINE MAY EXHIBIT AN OVERHEAT CONDITION OR THE COOLANT RESERVOIR HAS RUST IN IT. *TT
980172000-12-27. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. CUSTOMER SATISFACTION CAMPAIGN INVOLVING VEHICLES EXHIBITING INCREASED OIL CONSUMPTION. *TT
000322000-07-25. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE. SOME CUSTOMERS MAY EXPERIENCE ILLUMINATION OF THE SERVICE ENGINE SOON (SES) LIGHT AND CODE P0300 (GENERAL MISFIRE), WITH DRIVEABILITY COMPLAINTS OF ENGINE MISFIRE, ROUGH IDLE AND HESITATION. **MR
990602012B2000-05-31. Service bulletin. ENGINE AND ENGINE COOLING. SOME CUSTOMERS MAY COMMENT THAT THE HEATER IS INOPERATIVE, BLOWS COLD AIR, ENGINE MAY EXHIBIT AN OVERHEAT CONDITION OR THE COOLANT RESERVOIR HAS RUST IN IT. *TT
990602012A2000-04-07. Service bulletin. ENGINE AND ENGINE COOLING. SOME CUSTOMERS MAY COMMENT THAT THE HEATER IS INOPERATIVE, BLOWS COLD AIR, ENGINE MAY EXHIBIT AN OVERHEAT CONDITION OR THE COOLANT RESERVOIR HAS RUST IN IT. *TT
980172000-04-06. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. VALVE ROCKER ARM COVER FAILED, CAUSING OIL CNSUMPTION TO INCREASE. YD
980171998-11-03. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SOME VEHICLES MAY EXHIBIT INCREASED OIL CONSUMPTION. *YC
981201998-10-20. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SOME VEHICLES MAY EXHIBIT A INCREASED OIL CONSUMPTION. *YC

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