K 3500 Truck 4WD V8-454 7.4L VIN J SFI (1996)
Owner Letter
October, 1996
Dear GM Truck Customer:
As a valued customer, your complete satisfaction with your GM truck is our goal. In keeping with this goal, we want to let you know that we have
discovered a problem that could affect your vehicle and we want to take care of it at no charge to you.
On certain 1996 C/K model trucks equipped with a 7.4L gasoline engine, such as yours, the crankshaft balancer center attaching bolt may have been
under torqued. This bolt secures the balancer, which is pressed onto the crankshaft, and the accessory drive pulley, which is attached to the balancer, to
the engine crankshaft. If this bolt were to completely loosen, the balancer press fit would begin to loosen. This loosening would likely manifest itself as
accessory drive belt noise, soon followed by the drive belt corning off the pulley or breaking, which would cause a loss of drive to the engine
accessories. Additionally, the loosening of the balancer pulley assembly would likely damage the crankshaft.
To be absolutely sure that your vehicle is to specifications, we will torque the crankshaft balancer center bolt up to the specified torque.
Instructions for performing this service have been, sent to your GM dealer. Please contact your GM dealer to arrange a service date as soon as possible.
This procedure will take about 40 minutes to complete, but you should ask how much additional time your dealer will need to schedule and process your
vehicle.
The enclosed postage paid owner reply card identifies your vehicle. Presentation of this card to your dealer will assist in making the necessary correction
to your vehicle in the shortest possible time. If you have sold or traded your vehicle, please furnish us the complete name and address of the person you
sold or traded your vehicle to and return the card to us.
We are sorry to cause you this inconvenience; however, we have taken this action in the interest of your continued satisfaction with our product.
