Units with 4 wheel disk brakes may develop at situation where the park brake does not hold as it should. Our technicians tell us this can be caused by worn park brake shoes located inside the drum section of the rear brake disks. The worn shoes should be replaced and properly adjusted to correct this issue.
Parking Brake Does Not Hold Due to Worn Parking Brake Shoes on GMC Yukon XL 2500
Average mileage: 80,000 (80,000–80,000)
8 people reported this problem
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Parking brake goes to floor. Tech said that build-up of rust and wearing of drum combine on rear disc/drum and prevents removal of the pads. need to replace disc/drum. finally did this a roughly 140,000 miles. Problem solved.