STEERING WHEEL NOT INDEXED LEVEL-REPOSITIONING PROCEDURE. GMC Truck GMC MD Conventional (C Model) 1990

DRIVERS OF SOME 1990 TOPKICK/KODIAK MODEL TRUCKS MAY NOTE THE STEERING WHEEL IS NOT HORIZONTALLY LEVEL . AN INCORRECTLY POSITIONED STEERING WHEEL TO THE STEERING COLUMN SHAFT CAN BE ONE CAUSE OF THIS CONDITION.

TO CORRECT A STEERING WHEEL THAT IS NOT LEVEL, IT IS NECESSARY TO REMOVE THE STEERING WHEEL AND REPOSITION IT AS CLOSE TO LEVEL AS POSSIBLE. THERE ARE 36 SPLINES ON THE STEERING COLUMN SHAFT 10 DEGREES APART. BECAUSE THE SPLINES ARE 10 DEGREES APART, THE STEERING WHEEL CAN BE AS MUCH AS 5 DEGREES (APPROXIMATELY 7/8") AT THE RIM FROM BEING HORIZONTALLY LEVEL IN EITHER DIRECTION. DEGREE MEASUREMENT CAN BE PERFORMED USING A PROTRACTOR OR LEVEL INDICATOR. MEASURING INSTRUMENT SHOULD PLACED ON STEERING WHEEL CROSSBAR.

PRIOR TO REINDEXING THE STEERING WHEEL, VERIFY WHILE DRIVING VEHICLE STRAIGHT AHEAD THAT THE STEERING WHEEL IS MORE THAN 5 DEGREES (APPROXI-MATELY 7/8") OFF LEVEL.

IF THE STEERING WHEEL IS LESS THAN APPROXIMATELY 7/8" OFF LEVEL, THIS IS NORMAL BY DESIGN, AND REINDEXING WILL NOT IMPROVE THE STEERING WHEEL LEVEL.

IF THE STEERING WHEEL IS MORE THAN 7/8" OFF LEVEL, REINDEX ACCORDINGLY PER INSTRUCTIONS IN THE 1990 MEDIUM TRUCK C5H, C6H, C7H MODELS SERVICE MANUAL X-9033, SECTION 3B4. (REFER TO FIG. 1 IN THIS BULLETIN).

IMPORTANT: THERE IS AN INDEX MARK ON THE STEERING WHEEL HUB AND ON THE STEERING COLUMN SHAFT. THESE MARKS ARE PRESENT FROM A PREVIOUS DESIGN AND SHOULD NOT BE USED TO ALIGN THE STEERING WHEEL TO THE STEERING COLUMN.

WARRANTY INFORMATION

FOR VEHICLES REPAIRED UNDER WARRANTY USE:

LABOR OPERATION: E7020 STEERING WHEEL REPLACE

Object Number: 88124 Size: FS

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.