K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
1990
C/K
Ft. Wayne (Z)
SOP
LZ525988
1990
C/K
Oshawa (1)
SOP
L1536879
1990
C/K
Pontiac (E)
SOP
LE530905
Special Policy Adjustment
Ball Joints:
On 1988, 1989 and 1990 models up to the VIN breakpoints, for a period of 5 years or 100,000 miles (160,000 km) of purchase, whichever occurs first, if
a customer experiences contamination of any of the maintenance-free ball joints, all maintenance-free ball joints will be replaced with greaseable ball
joints at no charge. However, there is a reduced likelihood that a 1990 model truck complaint of squeaking while turning, more frequent steering input
while driving down the road or a symptom that a maintenance-free ball joint might be wearing out is attributable to a contaminated maintenance-free ball
joint due to the improved performance of 1990 model year maintenance-free ball joints.
For 1990 model trucks only, conduct the ball joint wear check included in this Bulletin to determine whether a customer complaint is attributable to
contamination of a maintenance-free ball joint. Do not replace the maintenance-free ball joints in a 1990 model truck unless a ball joint check indicates
over 1 mm (0.040 inch) of lash. Additionally, the customer may be eligible for reimbursement for previous repairs with supporting documentation.
Field testing has now confirmed that a 1988-90 C/K truck does not require front wheel alignment due to ball joint replacement. Therefore, caster/camber
alignment will no longer be provided upon customer request under this special policy. However, in the interest of customer satisfaction and upon
customer request, a toe-in alignment
may be completed after maintenance-free ball joint replacement under this special policy.
Front Wheel Caster/Camber Alignment Parts Kit:
On 1988, 1989 and 1990 models up to the VIN breakpoints, for a period of 5 years or 100,000 miles (160,000 km) of purchase, whichever occurs first, if
a customer's vehicle requires caster/camber alignment, the caster/camber alignment parts kit will be provided at no charge (but not the installation cost).
Testing has confirmed that caster/camber alignment is only required due to accident or road hazard damage.
Bulletin Filing
This "SPECIAL POLICY BULLETIN" should be filed in your "SPECIAL POLICY ADJUSTMENT BULLETINS" binder.
OWNER NOTIFICATION
Owners of all vehicles involved in this SPECIAL POLICY ADJUSTMENT have been notified by GMC Truck Division (see copy of owner letter
included with this bulletin).
BALL JOINT WEAR CHECK (1990 Only)
The following checking procedures apply to 1990 K Model upper and lower ball joints and 1990 C Model upper ball joints only. (1990 C Models have
greaseable lower ball joints).
1990 K MODEL LOWER
^
Be sure the vehicle rests on a level surface.
^
Raise and support front of vehicle with suitable safety stands. Support the lower control arm with a floor stand or jack as far outboard as
possible.
^
The vehicle must be stable and should not rock on the floor stands.
^
If the vehicle is equipped with aluminum wheels it may be necessary to first remove the wheel.
