Diagnosis Of The Steering Column - GMC G Service Manual

DIAGNOSIS OF THE STEERING COLUMN

PROBLEM
Lock System Will Not 1. Lock bolt damaged.
Unlock
2. Malfunctioning lock cylinder.
3. Damaged housing.
4. Damaged or collapsed sector.
5. Damaged rack.
Lock System Will Not 1. Lock bolt spring is broken.
Lock
2. Damaged sector tooth.
3. Malfunctioning lock cylinder.
4. Damaged housing.
5. Damaged rack.
6. Interference between the bowl and coupling.
7. Ignition switch stuck.
8. Actuator rod restricted or bent.
9. Transmission linkage adjustment is incorrect.
Lock System — High 1. Lock cylinder is malfunctioning.
Lock Effort 2. Ignition switch is malfunctioning.
3. Rack preload spring is broken or weak.
4. Burrs on the sector, rack, housing, support,
5. Bent sector shaft.
6. Distorted rack.
7. Misalignment of the housing to the cover (tilt
8. Distorted coupling slot in the rack (tilt only).
9. Bent or restricted actuator rod.
10. Ignition switch mounting bracket is bent.
Lock Cylinder — High 1. Burr on tang of shift gate.
Effort Between The 2. Distorted rack.
"Off" And "Off Lock"
Positions
Sticks In "Start" 1. Actuator rod is deformed.
Position 2. Any high effort condition.
Key Cannot Be 1. Ignition switch is not set correctly.
2. Malfunctioning lock cylinder.
Removed In The
"Off-Lock" Position
1. Malfunctioning retainer.
The Lock Cylinder
Can Be Removed 2. Burr over the retainer slot in the housing
Without Depressing
The Retainer
Lock Bolt Hits The
Shaft Lock In The
"Off" And "Park"
Positions
POSSIBLE CAUSE
tang of the shift gate or actuator rod coupling.
only).
cover.
Ignition switch is not set correctly.
STEERING COLUMN 3B4-3
CORRECTION
1. Replace the lock bolt.
2. Replace or repair the lock cylinder.
3. Replace the housing.
4. Replace the sector.
5. Replace the rack.
1. Replace the spring.
2. Replace the sector tooth.
3. Replace the lock cylinder.
4. Replace the housing.
5. Replace the rack.
6. Adjust or replace
7. Adjust or replace.
8. Adjust or replace
9. Adjust.
1. Replace the lock cylinder.
2. Replace the ignition switch.
3. Replace the spring.
4. Remove the burrs.
5. Replace the shaft.
6. Replace the rack.
7. Replace either or both.
8. Replace the rack.
9. Straighten or replace the rod.
10. Straighten or replace the bracket.
1. Remove the burr.
2. Replace the rack.
1. Straighten or replace the rod.
2. See "correction" under the high effort
diagnosis.
1. Adjust ignition switch.
2. Replace the lock cylinder.
1. Replace the lock cylinder
2. Remove the burr.
Adjust the ignition switch.
GMTB-0877-2L