5TH GEAR WHINE (INSTALL REVISED SHIFT LEVER). GMC Truck S15 Pickup

REVISION: 04/11/94

THIS BULLETIN IS BEING REVISED TO INCLUDE SERVICE PARTS INFORMATION AND TO UPDATE THE PROCEDURE. PREVIOUS DIVISIONAL PUBLICATION NUMBERS WERE: CHEVROLET 93-172-7B GMC TRUCK 93-7B-64 GM CANADA 93-7B-108 ----------------------------------------------------------------------

SUBJECT: 5TH GEAR WHINE (INSTALL REVISED SHIFT LEVER AND BOOT)

MODELS: 1989-93 CHEVROLET AND GMC TRUCK S TRUCKS WITH 2.8L OR 2.5L ENGINE (RPOS LL2, L38, LN8) AND MANUAL TRANSMISSION

CONDITION:

SOME OWNERS MAY COMMENT ABOUT A WHINE OR A GEAR NOISE WHEN THE TRANSMISSION IS IN THE 5TH GEAR POSITION. THE NOISE USUALLY OCCURS AT HIGHWAY SPEEDS.

CAUSE:

THE AUDIBLE NOISE IS A RESULT OF THE INTERNAL GEARBOX WORKING NOISES BEING TRANSFERRED AND AMPLIFIED THROUGH THE SHIFT LEVER.

CORRECTION:

TO ISOLATE THE AUDIBLE NOISE FROM BEING TRANSFERRED INTO THE INTERIOR OF THE TRUCK, A REVISED SHIFT LEVER AND BOOT HAVE BEEN RELEASED.

SERVICE INFORMATION:

(REFER TO FIGURE 1)

1. REMOVE THE SHIFT KNOB (5) AND LOCK NUT (6). 2. REMOVE SCREWS (9) AND RETAINER (10), IF USED. 3. REMOVE SHIFT BOOT (8). 4. REMOVE THE SHIFT LEVER (7) AND THE LOCK NUT (11). . HOLD THE LOCK NUT AND UNSCREW THE SHIFT LEVER USING THE WRENCH SLOTS (A). 5. CUT OFF THE TOP, NON-THREADED, PORTION OF THE SHIFTER STUB SHAFT AT THE END OF THE THREADS (FIGURE 2).

IMPORTANT: DO NOT LEAVE MORE THAN 10MM MATERIAL ABOVE THE TOP THREAD.

6. INSTALL THE LOCK NUT (11), DO NOT TIGHTEN. 7. INSTALL THE REVISED SHIFT LEVER (P/N 15965641) AND TIGHTEN THE LOCK NUT (11) UP AGAINST THE SHIFT LEVER TO 47 N.M (35 LBS. FT.). 8. INSTALL THE SHIFT BOOT (8). 9. INSTALL THE RETAINER (10) AND SCREWS (9), IF USED. 10. INSTALL THE LOCK NUT (6) ALL THE WAY ON, DO NOT TIGHTEN. 11. SCREW THE SHIFT KNOB AGAINST THE LOCK NUT, BACK THE SHIFT KNOB OFF TO ALIGN THE SHIFT PATTERN AND TIGHTEN THE LOCK NUT AGAINST THE KNOB.

SERVICE PARTS INFORMATION:

PART NUMBER DESCRIPTION

15965641 SHIFT LEVER 15975563 SHIFT BOOT

PARTS ARE CURRENTLY AVAILABLE FROM GMSPO.

WARRANTY INFORMATION:

FOR VEHICLES REPAIRED UNDER WARRANTY, USE:

LABOR OP DESCRIPTION LABOR TIME

K1060 LEVER, GEAR SHIFT CONTROL-REPLACE USE PUBLISHED LABOR OPERATION TIME FIGURES: 2

USE ORIGINAL ART

CAPTIONS: FIGURE 1 - SHIFT LEVER AND BOOT FIGURE 2 - SHIFTER STUB SHAFT

Object Number: 83132 Size: FS

Object Number: 86372 Size: MF

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.