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Service bulletins for the 1993 Buick Riviera

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.

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

By type

By component

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
990730030A2001-05-24. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. OWNERS OF SOME VEHICLES EQUIPPED WITH HYDRA-MATIC 3T40, 4T60, 4T60-E OR 4T65-E TRANSAXLES MAY COMMENT ON A GRINDING AND / OR GROWLING NOISE THAT IS NOTICEABLE WHEN STANDING IN PARK ON A HILL OR SLOPE WITH THE ENGINE RUNNING AND THE PARKING BRAKE NOT APPLIED. *TT
9907300302000-03-01. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. SOME VEHICLES EQUIPPED WITH HYDRA-MATIC 3T40, 4T60 OR 4T60-E TRANSXALES MAY COMMENT ON A GRINDING AND / OR GROWLING NOISE THAT IS NOTICEABLE WHEN IN PARK ON INCLINE. *TT
100011998-08-24. Service bulletin. POWER TRAIN:AXLE ASSEMBLY. INFORMATION ON GROWLING NOISE IN TRANSAXLE DURING FIRST FOUR MINUTES AFTER START UP. *YC
577106A1997-06-27. Service bulletin. POWER TRAIN:DRIVELINE:DRIVESHAFT. COLD START RATTLE NOISE (DIAGNOSIS/SERVICE PROCEDURE). *TW
577106A1997-05-27. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. COLD START RATTLE NOISE. *TW
9573T40011996-04-25. Service bulletin. POWER TRAIN:DRIVELINE. GRINDING AND/OR GROWLING NOISE IN PARK ON INCLINE.*SD
5761131995-11-01. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. UNKNOWN
5771061995-11-01. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. COLD START RATTLE NOISE. *TW

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