The owners of some 2006-07 Chevrolet Colorado and GMC Canyon pickups may comment that the brakes seem to grab on the first two or three brake applications. According to bulletin PIT 4254B, this concern is typically intermittent and could be perceived as a front brake grab
The concern is most likely with the rear brakes. This may be the result of high spots in the braking surface of the rear drums.
Remove the rear drums and inspect the rear axle seals and wheel cylinders for leaks.
If no leaks are found, perform the following.
1. Resurface both rear drums to eliminate high spots.
TIP: Replace the rear brake shoes only if a leak is found and the shoes have been contaminated with fluid from the rear axle or wheel cylinder.
2. Replace the left side drum brake star wheel adjuster with part number 19133371. This adjuster has 15 teeth. Adjust the drum brakes per SI.
3. For the right side, grind off every second tooth of the star wheel adjuster and reinstall.
TIP: Part number 19133371 is threaded for the left side only. DO NOT attempt to install adjuster part number 19133371 on the right side of the vehicle.
- Thanks to Dan Oden
The concern is most likely with the rear brakes. This may be the result of high spots in the braking surface of the rear drums.
Remove the rear drums and inspect the rear axle seals and wheel cylinders for leaks.
If no leaks are found, perform the following.
1. Resurface both rear drums to eliminate high spots.
TIP: Replace the rear brake shoes only if a leak is found and the shoes have been contaminated with fluid from the rear axle or wheel cylinder.
2. Replace the left side drum brake star wheel adjuster with part number 19133371. This adjuster has 15 teeth. Adjust the drum brakes per SI.
3. For the right side, grind off every second tooth of the star wheel adjuster and reinstall.
TIP: Part number 19133371 is threaded for the left side only. DO NOT attempt to install adjuster part number 19133371 on the right side of the vehicle.
- Thanks to Dan Oden
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