Question about GMC Sierra
I put new shoes on the rear of a 98 z71 k1500. I had to loosen the adjustment some to get the drums back on. I thought they would automatically tighten up and adjust themselves when backing the truck up, am I wrong for assuming this?
I also thought there was a adjustment hole on the back side but I don't see one. All I see is a 1" oblong rubber gromment on each side and a small 1/4" gromment in the middle. Neither hole has the adjustment wheel behind it that I can tell. What am I supposed to do to adjust the rear brakes?
You are correct,the brakes are designed to self adjust when you back up, but this is After they have initially been adjusted after a brake job. You say you had to loosen the adjustment some to get the drums back on, this is normal, as the new brake shoes are thicker than the old worn ones. You are not wrong when you thought backing up the truck (and then applying the brakes) will adjust them. What is wrong with this though, is that you would probably have to back up and hit the brakes for a couple of hours if they are in need of quite a bit of adjustment, and that's if the adjusters are working perfectly. You really need to do an initial adjustment while the truck is still jacked up. The rubber grommets should be removed so you can adjust the brakes. It may be difficult to see the adjusters, but that's how you get to them. Do you have a brake adjusting tool? The slight bend in it makes it perfect for getting in the slot. Did you make sure the adjusting wheel is not seized up(or difficult to turn) while you had it apart? To adjust them just right, you can have the wheels on, truck jacked up, adjust and slowly spin the wheel. When you feel a very slight drag, it's adjusted properly. If you over adjust, you need to put a very thin screwdriver through the backing plate and hold the small metal piece that touches the adjusting wheel out and away from the wheel so you can back off on the adjustment. (this small plate is there to prevent the adjuster from loosening by only allowing it to turn in one direction, pushing the plate out of the way allows you to go in the opposite direction, to loosen the brake adjustment).
Posted on Aug 24, 2009
The star wheel adjuster should be behind that oblong hole -- pull out the rubber plug. You probably can't see the star wheel because it's all the way to one side.
Sounds like you know how to adjust them once you find the star wheel.
The brakes should adjust themselves -- some adjust when backing up, others when you use emergency brake. It may take a while...
Posted on Aug 23, 2009
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Posted on Jan 02, 2017
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