Excessive Rear Disc Bake Wear?

[Rogner2000]

Hey everyone.

I bought this truck with 138kmi on it. Replace all pads and rotors all around when i got it.

Tuck currently has 214kmi and still running strong. Since brake replacement at that 138kmi...

 

Front brakes are currently at 50%

Rears have been replace 3times, and squeelers are touching and will be needing replacement for the 4th time.

 

The calipers, and slides have never siezed. I've kept up on that and made sure of it.

And the hoses and in good shape and not collaped.

When i take off the wheels to check the rears and can grab the caliper and slide it back and forth by hand. So they're def not hanging up in any way.

 

I only; and have always used AC Delco pads. (which is what all the dealers put on)

I want to know if anyone's having or had the same problem?

 

Braking on the truck has always sucked from the day i got it.

 

Thanks for reading and thoughts!

[nickvrebel]

assuming you are referring to the 2000 model truck mentioned in your avatar:

the rear disk brakes on the GMT-800 trucks wear faster than the fronts as they sit from the factory.

you should get 100,000+ from the front brake pads and ~80,000 or so from the rear (I traded my 2003 with original brakes never touched at 86,000). The rear do typically wear faster than the front brakes. The brake feel on the 4 wheel disk trucks is horrible.

 

The wear you are experiencing is extreme. Are you using organic pads or ceramic? There are different AC Delco pads available if I'm not mistaken. Personally, I have always had good results with NAPA gold series ceramic pads.

[KMGZ400]

assuming you are referring to the 2000 model truck mentioned in your avatar:

the rear disk brakes on the GMT-800 trucks wear faster than the fronts as they sit from the factory.

you should get 100,000+ from the front brake pads and ~80,000 or so from the rear (I traded my 2003 with original brakes never touched at 86,000). The rear do typically wear faster than the front brakes. The brake feel on the 4 wheel disk trucks is horrible.

 

The wear you are experiencing is extreme. Are you using organic pads or ceramic? There are different AC Delco pads available if I'm not mistaken. Personally, I have always had good results with NAPA gold series ceramic pads.

 

 

yes, the napa pads are better then the already good gm pads

[Wires]

If you do a lot of gravel road driving, the tires kick up stones into the rear brakes, and eat the living crap out of them (reason that the newer "real trucks" have drums on the back. The Denali's etc stay with discs).

 

Are the pads just wearing, or the discs all gouged up?

[wages999]

My '04 is on it's third pair of rotors and fourth set of pads on the rear and it only has 62K miles. My problem is that the rear rotors keep rusting due to all the salt and grime thrown up on them in the winter. I don't drive the truck everyday and the rear rotors get rusty and then destroy the pads. Two sets of the pads were ACDelco.

[Rogner2000]

My '04 is on it's third pair of rotors and fourth set of pads on the rear and it only has 62K miles. My problem is that the rear rotors keep rusting due to all the salt and grime thrown up on them in the winter. I don't drive the truck everyday and the rear rotors get rusty and then destroy the pads. Two sets of the pads were ACDelco.

 

 

If you want to completely eliminate the rot problem on the rear brakes. Cut the Backing plates or dust shield (whatever you want to call them) off of the rearend. That way the rotors can breath.

[Rogner2000]

If you do a lot of gravel road driving, the tires kick up stones into the rear brakes, and eat the living crap out of them (reason that the newer "real trucks" have drums on the back. The Denali's etc stay with discs).

 

Are the pads just wearing, or the discs all gouged up?

 

Truck doesn't see off roading or gravel roads.

The dics stay in perfect shape. I cut the backing plates off on the rears since they were mostly rotted off anyways.

It's the main reason why all the rotors in the rear rot out. Cuz there's no place for the heat, and all other debis to go. Seen it on many of the 1500s and 2500s.

Most people know including chevy tech friend of mine do the same on there trucks. I've asked him about my problem but has no idea since all brake components are working properly, and his shop doesn't have a tool to test the brake pressure from the master cylinder or at the calipers. Currently only options i'm being told are possiably either the ABS modual or maybe the master cylinder could be cuasing the problem.

[441G]

If you do a lot of gravel road driving, the tires kick up stones into the rear brakes, and eat the living crap out of them (reason that the newer "real trucks" have drums on the back. The Denali's etc stay with discs).

 

Are the pads just wearing, or the discs all gouged up?

 

Truck doesn't see off roading or gravel roads.

The dics stay in perfect shape. I cut the backing plates off on the rears since they were mostly rotted off anyways.

It's the main reason why all the rotors in the rear rot out. Cuz there's no place for the heat, and all other debis to go. Seen it on many of the 1500s and 2500s.

Most people know including chevy tech friend of mine do the same on there trucks. I've asked him about my problem but has no idea since all brake components are working properly, and his shop doesn't have a tool to test the brake pressure from the master cylinder or at the calipers. Currently only options i'm being told are possiably either the ABS modual or maybe the master cylinder could be cuasing the problem.

 

 

 

on my 1999 and 2003 my right rear inner pad always wore quick i think this is a commom problem

[wicked ace]

On my '03 ext cab Z71 4x$, the original brakes were horrible. Composit rotors that delaminated. The pedal would go to the floor because of them. I got in a big fight with the dealer because he would not replace them. The truck sat for about a year and a half because I was not comfortable driving it. Eventually I replaced the rotors and pads with Powerstop slotted and Satisfied Pro Ceramic. The difference was incredable, I started to drive the truck again, a lot. I got 50k out of both front and rear which I did a full replacement again.

[wages999]

My '04 is on it's third pair of rotors and fourth set of pads on the rear and it only has 62K miles. My problem is that the rear rotors keep rusting due to all the salt and grime thrown up on them in the winter. I don't drive the truck everyday and the rear rotors get rusty and then destroy the pads. Two sets of the pads were ACDelco.

 

 

If you want to completely eliminate the rot problem on the rear brakes. Cut the Backing plates or dust shield (whatever you want to call them) off of the rearend. That way the rotors can breath.

 

 

The backing plates were almost rotted away with the first set of rotors, so I ripped them off. It has made the brakes last a little longer, but not much.

[CapitalTruck]

There was a TSB about installing a small shield (available from GM) in front of the rear wheels to protect the discs from getting so much crap on them in the pre-2005 trucks.