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Service bulletin 4001

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 id10019938
Published by NHTSA2006-05-16
Manufacturer's number4001
NHTSA componentSERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP

NHTSA's summary

INTERMITTENT UNWANTED DYNAMIC REAR PROPORTIONING (DRP) EVENT. *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

Brakes, Anti-lock brakes

Vehicles listed
BUICK LESABRE2000, 2001, 2002, 2003, 2004, 2005
BUICK PARK AVENUE2000, 2001, 2002, 2003
CADILLAC DEVILLE2000, 2001, 2002, 2003, 2004, 2005
CADILLAC SEVILLE2000, 2001, 2002, 2003, 2004
OLDSMOBILE AURORA2001, 2002, 2003
PONTIAC BONNEVILLE2000, 2001, 2002, 2003, 2004, 2005

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
PIT3271J2019-12-09. Service bulletin. This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use the information that is provided by the antilock braking system tire size selection.
050525010A2006-01-11. Service bulletin. TRACTION CONTROL LIGHT ON/TRACTION CONTROL INOPERATIVE, DIAGNOSTIC TROUBLE CODE (DTC) C1295 STORED IN HISTORY (PERFORM DIAGNOSTIC CHECKS). *TS
110620032005-04-11. Service bulletin. WHEEL SPEED SENSOR. *EH
021412004-08-25. Service bulletin. REPEAT ANTI-LOCK BRAKE SYSTEM (ABS) LIGHT WITH DIAGNOSTIC TROUBLE CODE (DTC) C1225. VARIOUS MODELS INCLUDING 2005 CADILLAC DEVILLE. *TT
0405250012004-08-12. Service bulletin. INTERMITTENT SERVICE STABILITY SYSTEM DIC MESSAGE WITH ANTI-LOCK BRAKE SYSTEM (ABS) DIAGNOSTIC TROUBLE CODE (DTC) C1288. *TT
1806022002-11-21. Service bulletin. BRIEF SERVICE INFORMATION REGARDING THE ANTILOCK BRAKE LIGHT COMING ON AND MULTIPLE CODES SET. *TT
0604012001-05-30. Service bulletin. INFORMATION REGARDING ABS SENSOR - WATER WICKING THROUGH THE CONNECTOR AND GETTING INTO THE BEARING. *TT
1511002001-02-25. Service bulletin. ON SOME VEHICLES, THE ANTILOCK BRAKE SYSTEM OR TRACTION CONTROL SYSTEM MIO LAMPS ARE ILLUMINATED ON THE INSTRUMENT PANEL. ALSO THE ABS/TCS WIRING HARNESS LOCATED IN THE VEHICLE'S FRONT WHEEL WELL AREA EXHIBITS A CHAFFING CONDITION, OR, IN SOME CASES, BE COMPLETELY MISSING. *TT