SMU - SECTION 5F - 'PARKING BRAKE'

SUBJECT: SERVICE MANUAL UPDATE - SECTION 5F - "PARKING BRAKE"

MODELS: 1991-95 CHEVROLET AND GMC TRUCK C3500 HD MODELS

THIS BULLETIN UPDATES SECTION 5F "PARKING BRAKE" OF THE 1991-1995 C/K TRUCK SERVICE MANUALS. THE TORQUE CALLOUT IN THE DRUM REPLACEMENT PROCEDURE ON THE C3500 HD HAS BEEN CHANGED. IN ADDITION, THE FASTENER TIGHTENING SPECIFICATION CHART HAS BEEN UPDATED TO REFLECT THE TORQUE CHANGE.

DRUM REPLACEMENT

REMOVE OR DISCONNECT (FIGURES 1 AND 2)

1. RELEASE THE PARKING BRAKE. 2. RAISE THE VEHICLE AND SUPPORT WITH STANDS. 3. PROPELLER SHAFT. REFER TO SECTION 4A. 4. NUT AND WASHER IF EQUIPPED WITH MANUAL TRANSMISSION. 5. BOLT AND WASHER IF EQUIPPED WITH AUTOMATIC TRANSMISSION. 6. DRUM AND YOKE ASSEMBLY. 7. BOLTS AND WASHERS. 8. DRUM FROM YOKE.

INSTALL OR CONNECT (FIGURES 1 AND 2)

1. DRUM TO YOKE. 2. BOLTS AND WASHERS. TIGHTEN: * BOLTS TO 37 N.M (27 LB FT). 3. DRUM AND YOKE ASSEMBLY. 4. WASHER AND NUT IF EQUIPPED WITH MANUAL TRANSMISSION. 5. WASHER AND BOLT IF EQUIPPED WITH AUTOMATIC TRANSMISSION. TIGHTEN: * NUT TO 475 N.M (350 LB FT). * BOLT TO 122 N.M (90 LB FT). 6. PROPELLER SHAFT. REFER TO SECTION 4A. 7. LOWER THE VEHICLE.

FIGURES: 2 ATTACHMENTS: 0 CAPTIONS: FIGURE 1 - DRUM REPLACEMENT FIGURE 2 - DRUM AND YOKE

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 1995 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.