GMT800 Rear Inner Brake Pad or Rotor Issue

[DieselSlug]

Not entirely sure whats wrong yet, but it doesn't look right. Look at how the new pad sits in in the mount on each side of the rotor. Notice a big difference?





If you can't tell via pad and mount, look at where the rotor rides in the opening of the bracket! Its not centered even woth the bracket tightened down.

I've been having pad issues and a clunking coming from the rear passenger. What i found was the pad was so thin, it could nearly slip out of the mount and fall out! The calipers are NAPA remans, the rotors are Detroit Axle brand from either the Jungle store or eBay. My gut tells me these rotors are either not correct for my application, or are manufactured sub-par in an overall narrower fashion. I've got about 10k miles on the rotors this way before just realizing this. I need to get my hands on another set of rotors and measure the thickness.

 

[ak diesel driver]

Looks more like the offset is wrong

 

[DieselSlug]

So, OEM rotors are 30mm thick. Thats just over 1 and 1/8-inches. The current garbage I've been running measures 3/4 of an inch.

So what brand rotors are good off of RockAuto? Am I stuck with GM Genuine for $140each?

 

[dbrannon79]

I was just gonna say it looks like those rotors are really thin! the inner pad isn't sitting on the slides and could easily slip out from what I can see.

the other thing too with the spindle where the caliper bracket mounts. I'm sure you had to remove the bracket, check that surface where the bracket sits and make sure rust hasen't bulged out creating an offset for the caliper.

 

[Will L.]

Oh yeah- those pads are barely in the slides.

 

[BigDogYJ]

yeah im guessing wrong rotors. thats sketchy. I do like stock ac delco rotors but thats a lot for rotors. I've also used Bosch quiet cast pads and rotors in the past with good luck.

 

[DieselSlug]

Im putting in an order to RA today. Need to go see if there are any currwnt codes in the RA thread! Thanks all.

 

[dbrannon79]

Donno if it will help with rust issues but before you install new rotors and other steel components, maybe try electro-plating them in some water.

There are lots of youtube instructionals on how to do it at home with a battery charger. I would use copper or some other non rusting metal to plat them with. that will get into all the crevices and fins of the rotor keeping it rust free for a while longer. if it won't hurt the rubber seals and such, plug off the fluid cavity and do the calipers, bracket and anything you can plate.

iirc you can use pennies and scrap copper to make the water solution then start plating. on the old parts your re-using, just soak in some phosphoric acid to eat off the rust. wire brush and soak again. it will take some time to get it all done, but the outcome should be worth the effort.

 

[DieselSlug]

I actually ended up getting electro-plated rotors instead of painted. I think Raybestos Element3 rotors is what they were. Mainly because I heard of the brand, and them peddling the electroplated rust prevention. I still bet these are gonna rust the first night they are on.

I confirmed overall measurements with the OEM GM as well, not getting shorted this time!

 

[smokymtn65]

I have been running power stops on my 07 burb, and 2000 Silverado and they are coated, worked very well

 

[BigDogYJ]

Yeah I ended up getting fully coated powerstop pads and rotors on my 2000 Silverado. They feel great and silent. Really
Helped out the vacuum assist as all my other rigs run hydro boost. Might do an upgrade at some point to install hydro boost on the 2000 also.

 

[Big T]

Go to PartsGeek.com as they are way cheaper on rotors. The Raybestos Advanced Technology Rotors are the same as the top end AC Delco. Screen captures of slotted and regular Raybestos for GMT-400 front:



RockAuto will gouge you for shipping cost on rotors.

https://www.partsgeek.com/catalog/2002/chevrolet/silverado_2500_hd/brake/brake_rotor.html

Raybestos and AC Delco are at the bottom of the page linked above.

 

[DieselSlug]

Go to PartsGeek.com as they are way cheaper on rotors. The Raybestos Advanced Technology Rotors are the same as the top end AC Delco. Screen captures of slotted and regular Raybestos for GMT-400 front:

View attachment 96829View attachment 96830

RockAuto will gouge you for shipping cost on rotors.

https://www.partsgeek.com/catalog/2002/chevrolet/silverado_2500_hd/brake/brake_rotor.html

Raybestos and AC Delco are at the bottom of the page linked above.

I will check this site out next time. Never heard of this one.

 

[MrMarty51]

I will check this site out next time. Never heard of this one.

I have ordered parts through them, IIRC they was dependable and seemed quick on shipping, but, its been a while.

 

[Big T]

I have ordered parts through them, IIRC they was dependable and seemed quick on shipping, but, its been a while.

I’ve recently ordered Raybestos slotted front brake rotors from PartsGeek.com. Their price was about half what RockAuto.com was asking and their shipping cost was far less. Order came timely. No issues. Ready to order more.