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.
74,105

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 410 nationwide Sonoma listings starting at $1,850.

ZIP:

GMC Sonoma Experts

  • #1
    parkle
    Reputation
    720
  • #2
    Mike Bonnell
    Reputation
    480
  • #3
    James Mayfield
    Reputation
    320
View All

Related Models For Sale

Used Chevrolet S-10
12 Great Deals out of 1,193 listings starting at $1,980
Used Ford Ranger
155 Great Deals out of 5,279 listings starting at $999
Used Toyota Tacoma
644 Great Deals out of 41,018 listings starting at $2,500
Used Chevrolet Silverado 1500
2,867 Great Deals out of 161,876 listings starting at $1,295
Used GMC Sierra 1500
1,230 Great Deals out of 63,095 listings starting at $1,200
Used Ford F-150
3,206 Great Deals out of 226,356 listings starting at $1,250
Used Nissan Frontier
488 Great Deals out of 24,825 listings starting at $1,800
Used Dodge Dakota
88 Great Deals out of 3,518 listings starting at $1,475
Used Dodge Ram 1500
381 Great Deals out of 11,013 listings starting at $1,699
Used Chevrolet Blazer
907 listings starting at $950
Used Toyota Tundra
704 Great Deals out of 34,649 listings starting at $1,995
Used Chevrolet C/K 1500
811 listings starting at $2,995

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.