PARK BRAKE WILL NOT RELEASE OR RELEASES SLOWLY. Cadillac Concours 1994

For 1990-2009 cars

# PARK BRAKE WILL NOT RELEASE OR RELEASES SLOWLY

#### SUBJECT: PARK BRAKE WILL NOT RELEASE OR RELEASES SLOWLY (ADJUST OR REPLACE PARK BRAKE VACUUM RELEASE SWITCH)

#### MODELS: 1994 CADILLAC CONCOURS, DEVILLE, ELDORADO AND SEVILLE WITH COLUMN SHIFT TRANSAXLES

#### VIN BREAKPOINTS:

CONCOURS AND DEVILLE: BEFORE VIN 217396 ELDORADO: BEFORE VIN 605727 SEVILLE: BEFORE VIN 818061

#### CONDITION:

SOME OWNERS MAY COMMENT THAT THE PARK BRAKE WILL NOT RELEASE OR RELEASES SLOWLY. THIS MAY BE MORE PREVALENT IN COLD AMBIENT CONDITIONS.

#### CAUSE:

THIS CONDITION MAY BE CAUSED BY A MISADJUSTED OR DEFECTIVE PARK BRAKE VACUUM RELEASE SWITCH.

#### CORRECTION:

1. REMOVE THE LEFT HAND LOWER I/P SOUND INSULATOR BY REMOVING TWO 7MM SCREWS AND (ON ELDORADO AND SEVILLE) DISCONNECTING THE COURTESY LAMP CONNECTOR.

2. INSPECT THE PARK BRAKE VACUUM RELEASE SWITCH ON THE STEERING COLUMN (SEE ILLUSTRATION). IF THE SWITCH HAS A RETAINING TAB FOR THE VACUUM HARNESS, REPLACE THE SWITCH WITH A SWITCH WITHOUT THE TAB, P/N 1630023. SWITCHES WITH A TAB HAVE BEEN IDENTIFIED AS HAVING A POTENTIAL INTERNAL LEAK.

3. IF THE SWITCH DOES NOT HAVE A TAB OR THE SWITCH IS BEING REPLACED, CHECK ADJUSTMENT OF THE SWITCH (SEE ILLUSTRATION). THERE SHOULD BE APPROXIMATELY 2MM OF OVERLAP BETWEEN THE TWO HALVES OF THE SWITCH. TO ADJUST THE SWITCH, BACK OUT THE TWO METAL RETAINING CLIPS ON THE SWITCH (IF THE SWITCH IS BEING ADJUSTED ON THE COLUMN, IT MAY ONLY BE POSSIBLE TO REACH ONE CLIP). MOVE TWO HALVES OF THE SWITCH TO ACHIEVE PROPER OVERLAP. PUSH IN RETAINING CLIPS.

4. CHECK FOR PROPER PARK BRAKE RELEASE.

5. INSTALL THE LEFT HAND LOWER I/P SOUND INSULATOR.

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

#### WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OPERATION NUMBER: H2850 USE PUBLISHED LABOR OPERATION TIME.

FIGURES: 1

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.

COPYRIGHT 1994 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.