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Makes 🢒 GMC_Truck 🢒 2004 🢒 Canyon Pickup - 4WD 🢒 Bulletins 🢒 Premature Rear Drum Brake Wear - keywords cable shoe stop

Premature Rear Drum Brake Wear - keywords cable shoe stop

Subject: Premature Rear Drum Brake Wear

Models:2004-2007 Chevrolet Colorado Pick Up
2004-2007 GMC Canyon Pick Up


This PI was superseded to update model years. Please discard PIT3567G.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:

A vehicle may arrive with a concern of premature rear drum wear. There are two possible concerns that can lead up to this concern.

  1. Park Brake Cable Bind.
  2. Excessive dust and/or dirt enters the rear drums in rural areas or when used in off road applications.

Recommendation/Instructions:
  1. Excessive dust and/or dirt enters the rear drums in rural areas or when used in off road applications.
    2. • Inspect the park brake pedal assembly. Make sure the park pedal applies and releases correctly with no signs of cable binding
    • At the park brake pedal assembly, a zip tie may have been used to aid in the installation of the park brake pedal and front park brake cable assembly. This zip tie may still be attached to the front park brake cable and the pedal assembly. If the zip tie was left attached during assembly, it can cause the rear park brake cable to bind and keep the rear brake slightly applied after the park brake is released. If a zip tie is found, remove the zip tie from the park brake pedal/cable area at the drivers left lower A-pillar and re-evaluate park brake operation.
    • Inspect parking brake cable operation. Follow the park brake cable from the park brake pedal assembly to the rear drums. Inspect for binding, cuts or abrasions on the housing of the cable that would allow water or debris to enter and create a park brake cable bind. Replace cable(s) as needed.
  2. If excessive dirt is found in the rear drums, question the customers driving habits and use. If the excessive dirt was found due to driving in rural areas or off road applications, the customer will need to service the brakes more frequently than a customer that does not drive in this manor. No change to the braking system is expected.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.