On my GMC Sonoma SLS (4x4), I have two pistons on the brake Caliper and can not get them to seat equally flush. At the best I can get about 1/4 inch sticking out. Is this normal or am I missing a step? Thank You in advance :)

5

Asked by Dec 28, 2013 at 06:37 PM about the 2000 GMC Sonoma SLS Ext Cab Short Bed 4WD

Question type: Maintenance & Repair

I can not get them to seat equally flush.  At the best I can get about 1/4 inch sticking out.  
Is this normal or am I missing a step?  Thank You in advance :)

5 Answers

the caliper has two slides that have a "shoulder" to cry on...er um to purchase and square up...seen it where the careless installer cross- threaded the pins leading to uneven front to backside wear....I'd start by checkin' the amount of squish....you shoud be able to force the fluid back upstream and create the wiggle room that you can test the smoothness of the slides....disassemble, clean and use dilectric grease (white grease) on them....check the smoothness of operation...replace the caliper if the piston is stickin'~....that would cause uneven braking and be immediately obvious~

is there uneven pad wear (inside and outside)?~definitively would look at the ease of slides...you know they are supposed to "stick out" and have a rubber boot protectin' the slide....okay~?

if you're re-using the old disc rotors the wear is gonna be a little uneven, but if the slide is sticking will be mostly worn that one side~

1 of 1 people found this helpful.
69,295

Keep the piston side pad mounted on the pistons. Then using a large "C" clamp compress the pistons that way. Be sure to remove the lid of the master cylinder as well and have rags handy to soak up any spilled brake fluid from the master cylinder. Brake fluid eats paint. HTH. -Jim

2 of 2 people found this helpful.

Jim....it's been a while, forgot about the clamp....I've Giant c-clamp in my box I'd use just for this....also the hydraulic piston pusher that cradles inside the casting....got one of those too...use it for a steering wheel puller mostly with two added clearance holes~

1 of 1 people found this helpful.

Your Answer

Sonoma

Looking for a Used Sonoma in your area?

CarGurus has 442 nationwide Sonoma listings starting at $1,900.

ZIP:

GMC Sonoma Experts

  • #1
    parkle
    Reputation
    670
  • #2
    Mike Bonnell
    Reputation
    480
  • #3
    James Mayfield
    Reputation
    320
View All

Related Models For Sale

Used Chevrolet S-10
8 Great Deals out of 1,263 listings starting at $999
Used Ford Ranger
185 Great Deals out of 5,522 listings starting at $1,000
Used Chevrolet Silverado 1500
2,119 Great Deals out of 183,385 listings starting at $1,900
Used Toyota Tacoma
561 Great Deals out of 41,765 listings starting at $2,999
Used GMC Sierra 1500
781 Great Deals out of 67,901 listings starting at $1,800
Used Dodge Dakota
130 Great Deals out of 3,697 listings starting at $1,650
Used Ford F-150
2,216 Great Deals out of 180,841 listings starting at $1,500
Used Nissan Frontier
317 Great Deals out of 20,878 listings starting at $1,995
Used Dodge Ram 1500
411 Great Deals out of 10,661 listings starting at $1,000
Used GMC Yukon
415 Great Deals out of 20,793 listings starting at $1,495
Used Toyota Tundra
418 Great Deals out of 33,614 listings starting at $1,999
Used Chevrolet Blazer
3 Great Deals out of 1,153 listings starting at $1,500
Used Chevrolet C/K 1500
896 listings starting at $2,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.