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Service bulletin 536506A

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 id52567
Published by NHTSA1997-08-14
Manufacturer's number536506A
Manufacturer's date1997-06-01
Replaces53-65-06
NHTSA componentELECTRICAL SYSTEM:IGNITION:MODULE

NHTSA's summary

DRIVELINE VIBRATION OVER 37 MPH (REPLACE PROM). *TW

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

Electrical system, Ignition

Vehicles listed
BUICK LESABRE1994, 1995
BUICK PARK AVENUE1994, 1995
BUICK RIVIERA1995
OLDSMOBILE 881994 to 1995
OLDSMOBILE 981994 to 1995
PONTIAC BONNEVILLE1994, 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
CMP/95C11B11995-11-01. Service bulletin. GENERAL MOTORS HAS DETERMINED THAT CERTAIN 1995 BUICK PARK AVENUE AND RIVIERA MODEL VEHICLES EQUIPPED WITH A 3800 SERIES II ENGINE (L36) MAY HAVE A DECELERATION STALL UNDER LIMITED CONDITIONS. THIS COULD RESULT IN A LOSS OF POWER STEERING ASSIST, GENERATOR AND POWER BRAKING ASSIST. TO PREVENT THIS CONDITION FROM OCCURRING, DEALERS ARE TO REPLACE SUSPECT MEM-CAL OF THE POWERTRAIN CONTROL MODULE (PCM) WITH A MEM-CAL OF AN IMPROVED DESIGN. *TW
CMP/95C11P11995-11-01. Service bulletin. GENERAL MOTORS HAS DETERMINED THAT CERTAIN 1995 PONTIAC BONNEVILLE MODEL VEHICLES EQUIPPED WITH 3800 SERIES II ENGINE (L36) MAY HAVE A DECELERATION STALL UNDER LIMITED CONDITIONS. THIS COULD RESULT IN A LOSS A LOSS OF POWER STEERING ASSIST, GENERATOR AND POWER BRAKING ASSIST. TO PREVENT THIS CONDITION FROM OCCURRING, DEALERS ARE TO REPLACE THE SUSPECT MEM-CAL OF THE POWERTRAIN CONTROL MODULE (PCM) WITH A MEM-CAL OF AN IMPROVED DESIGN. *TW