colorado brakes - The 1947 - Present Chevrolet & GMC Truck Message Board Network

oldschool18 · 03-26-2010, 04:24 PM

has anybody ever had a problem with the rear brakes locking up on there mid00's colorados and a fix if they know of one

**truckdude239** · 03-27-2010, 07:57 AM

i know they dont last long but never hear of a problem with them locking up

oldschool18 · 03-28-2010, 09:36 AM

yeah its weird there are 3 trucks that are doing it and cant figure out why thet are locking up

**bwood** · 03-28-2010, 10:06 AM

Is it just locking up once in a while at low speeds? The 04 Colorado we had at work would be extra touchy for just a minute when you first took off in the morning. I would pull up to the first sign in the parking lot and it would lock down, after that it was fine. My 99 S10 did the same thing.

clinebarger · 03-28-2010, 02:13 PM

Heres the TSB for this.

Excessive Brake Grab, Aggressive Drag, Lock Rear Brakes Drums and Shoes (Remove High Spots from Drum Surface Finish)

Models:
2005-2008 Chevrolet Colorado
2005-2008 GMC Canyon

Condition

After the vehicle has set for a while, during the first few stops, it will feel like the brakes are grabbing excessively. In addition, the tires may chirp and/or leave skid marks during braking.

Cause

This condition may be caused by a mirror-like finish between the drum and the brake shoe.

Correction

Remove the rear drums and inspect the rear axle seals and wheel cylinders for leaks. Inspect the brake shoes for contamination. If no leaks are found, perform the following:

Important: Only replace the rear brake shoes if a leak is found and the shoes have been contaminated with fluid from the rear axle or wheel cylinder.

1. Machine both rear drums to eliminate high spots.

2. For the left side, replace the drum brake star wheel adjuster with P/N 19133371. This adjuster is a 15-tooth adjuster.

Right side..

Important: P/N 19133371 is threaded for the left side only. DO NOT attempt to install the adjuster (P/N 19133371) on the right side of the vehicle.

3. For the right side, grind off every other tooth of the star wheel adjuster. Use suitable dremel and cut-off wheel (preferably a 1-1/4 in X 1/16 ).

4. Reinstall the adjuster and adjust the brake shoes accordingly.

**truckdude239** · 03-28-2010, 02:38 PM

wow i love the install new adjuster oin left side but cut every other tooth on the right side

oldschool18 · 03-28-2010, 08:25 PM

Clinebarger I think I am going to have to try that, cause we have ajusted the brakes 2 or 3 times and 2 weeks later they start grabbing again...........thanks everybody for your help

03-26-2010, 04:24 PM	#1
oldschool18 Registered User Join Date: Jan 2010 Location: Hollidaysburg, PA Posts: 785	colorado brakes has anybody ever had a problem with the rear brakes locking up on there mid00's colorados and a fix if they know of one

03-27-2010, 07:57 AM	#2
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,259	Re: colorado brakes i know they dont last long but never hear of a problem with them locking up __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2015 toyota Tacoma Daily 2012 Subura outback 2000 Tahoe 5.3l 420k 1999 honda accord General manager for Marco's Carwash & lube

03-28-2010, 09:36 AM	#3
oldschool18 Registered User Join Date: Jan 2010 Location: Hollidaysburg, PA Posts: 785	Re: colorado brakes yeah its weird there are 3 trucks that are doing it and cant figure out why thet are locking up

03-28-2010, 10:06 AM	#4
bwood Registered User Join Date: Jan 2003 Location: Denison, Texas Posts: 1,920	Re: colorado brakes Is it just locking up once in a while at low speeds? The 04 Colorado we had at work would be extra touchy for just a minute when you first took off in the morning. I would pull up to the first sign in the parking lot and it would lock down, after that it was fine. My 99 S10 did the same thing. __________________ 2013 Ford F150 FX4 2006 Chevy Silverado 1500 1982 Chevy C1500 2020 Ford Explorer Limited 2008 Ford Escape

03-28-2010, 02:13 PM	#5
clinebarger Senior Member Join Date: May 2009 Location: Fort Worth, TX Posts: 6,370	Re: colorado brakes Heres the TSB for this. Excessive Brake Grab, Aggressive Drag, Lock Rear Brakes Drums and Shoes (Remove High Spots from Drum Surface Finish) Models: 2005-2008 Chevrolet Colorado 2005-2008 GMC Canyon Condition After the vehicle has set for a while, during the first few stops, it will feel like the brakes are grabbing excessively. In addition, the tires may chirp and/or leave skid marks during braking. Cause This condition may be caused by a mirror-like finish between the drum and the brake shoe. Correction Remove the rear drums and inspect the rear axle seals and wheel cylinders for leaks. Inspect the brake shoes for contamination. If no leaks are found, perform the following: Important: Only replace the rear brake shoes if a leak is found and the shoes have been contaminated with fluid from the rear axle or wheel cylinder. 1. Machine both rear drums to eliminate high spots. 2. For the left side, replace the drum brake star wheel adjuster with P/N 19133371. This adjuster is a 15-tooth adjuster. Right side.. Important: P/N 19133371 is threaded for the left side only. DO NOT attempt to install the adjuster (P/N 19133371) on the right side of the vehicle. 3. For the right side, grind off every other tooth of the star wheel adjuster. Use suitable dremel and cut-off wheel (preferably a 1-1/4 in X 1/16 ). 4. Reinstall the adjuster and adjust the brake shoes accordingly.

03-28-2010, 02:38 PM	#6
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,259	Re: colorado brakes wow i love the install new adjuster oin left side but cut every other tooth on the right side __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2015 toyota Tacoma Daily 2012 Subura outback 2000 Tahoe 5.3l 420k 1999 honda accord General manager for Marco's Carwash & lube

03-28-2010, 08:25 PM	#7
oldschool18 Registered User Join Date: Jan 2010 Location: Hollidaysburg, PA Posts: 785	Re: colorado brakes Clinebarger I think I am going to have to try that, cause we have ajusted the brakes 2 or 3 times and 2 weeks later they start grabbing again...........thanks everybody for your help



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