Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1996 GMC Forward Control 6.5 Y, StandardFACTORY OEM SERVICE PROCEDURE
Lock Cylinder (Non-Functional): Removal
- Remove steering Column. See STEERING COLUMNΒ . Using Modular Column Holding Fixture (J-41352), secure steering column. Remove tilt lever, if equipped. Remove 2 lower shroud screws. Tilt lower shroud down and slide back to disengage locking tabs, then remove lower shroud. Remove upper shroud.
- Remove retaining ring. Remove wave washer. Using Lock Plate Compressor (J-23563-SIR), remove and discard retaining ring. Remove shaft lock shield assembly. Remove turn signal cancelling cam.
- On models with park lock cable, ensure lock cylinder is in OFF-LOCK position and gearshift is in Park. Insert small screwdriver into slot in lock module assembly, push against locking tab on end of cable and remove park lock cable.
- Remove 3 screws, and remove lock module assembly with upper shroud. Remove backing plate from lock module assembly. Mark 2 sector gears at PARK-LOCK position for installation reference. See Figure . Remove both sector gears.
- Using 1/8" burring tool, remove positioning tab on end of lock cylinder. See Figure . Remove all burrs in and around lock module assembly and lock cylinder. From inside lock module assembly, push on locking tab and pull out lock cylinder. Clean debris from lock module assembly.
NOTE:
Ensure 2 sector gears are properly aligned at OFF-LOCK position, or lock cylinder will be improperly timed.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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