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  1. #1

    Default Changed rear end now brakes won't go on

    Got a 02 gmc Sierra 1500 with the 4.8. The truck had 3.42 with no limited slip. I just put a g80 gt4 (limited slip, 373) in it. Both rear ends are disc brake. I have the vin for the truck it came out of and it shows it was a 4.8 ext 2002 chevy 4x4. I got new rotors and pads for it and went to put them on and the caliper bracket fits perfect but the caliper itself won't go on. I compressed the piston all the way in and everything but it will not go back on at all. I got the 325mm rotors and I called the parts store and gave them the info of the truck the rear end came out of and the part a numbers are the same as my truck for the caliper, bracket, and pads and rotors. I have no clue why they won't go on. My caliper is single piston. Any ideas?
    04 GMC Sierra 2500 HD 4x4
    6.0 vortec
    Custom CAI
    Diablosport Tuner
    Cowl Hood
    and lots more to come

  2. #2


    we just had another post about this. It is hard to do as swap like this because there are 2 different sized rotors for some of these trucks. I think one is a 330mm and one is a 325. The best thing to do is match up the existing rotors with the new ones. I have made countless trips to the parts store because of the different sizes. I find it best to just match the old ones.

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors,
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

  3. #3
    Sr. Engineer
    Join Date
    Oct 2010
    Indianapolis, In


    I recently replaced front caliper and bracket on 2000 Yukon. Found out not only is there a left and right caliper but ALSO left and right bracket. Can't mix left and right parts. May also be the case for the rear as well. If the brackets have been removed, check for correct hand. Remember, bleeders are on top of calipers.
    2000 GMC YUKON SLT, 5.3L tow pkg, G80 rear/w 3.73 gear

  4. #4


    Did you get the brake calipers that were with the replacement rear end assy?
    2010 Silverado LT 1500 5.3L 4X4
    '95 BMW K1100LT
    '97 BMW K1100LT

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