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1991 Sierra rear brake squeel #4107717 05/27/16 12:57 AM
Joined: Dec 2009
Posts: 285
sr17 Offline OP
OP Offline
Joined: Dec 2009
Posts: 285
My truck has an annoying squeal from the left rear wheel - it is pretty loud and always there when driving. The noise will disappear whenever I push the brak pedal, so somehow I suppose it is related to the drum brake.

I did take off the drum today, blew out the dust with compressed air and sprayed brake cleaner, but that did not fix it.

Any suggestions what might fix it?

2005 VW Jetta TDI - 222,000 km, M1 TDT
2000 VW Golf TDI - 354,000 km, Shell T6
1991 GMC Sierra 2500 5.7L 4 WD
Re: 1991 Sierra rear brake squeel [Re: sr17] #4107738 05/27/16 03:26 AM
Joined: Nov 2015
Posts: 1,462
KingCake Offline
Joined: Nov 2015
Posts: 1,462
Well, the drum could be worn oval. Or the shoes might not be adjusted correctly.

Bigger picture: could be a bad wheel bearing or bent axle causing the drum to have excessive runout.

Re: 1991 Sierra rear brake squeel [Re: sr17] #4107751 05/27/16 05:26 AM
Joined: Nov 2006
Posts: 22,217
Trav Offline
Joined: Nov 2006
Posts: 22,217
Make sure its the rear by applying light pressure to the E brake when moving, if it stops its the rear brakes if not look at the front.
Sometimes noises appear to be coming from one place but are really coming from somewhere else.

If its the rear I would first try the easiest thing which is adjust them until there is just a slight drag. Post back, there is no point getting in to all the possible causes and remedies at this point.

ASE L1, Master. Deutsch Meisterbrief.
Re: 1991 Sierra rear brake squeel [Re: sr17] #4108836 05/28/16 10:38 AM
Joined: Feb 2013
Posts: 3,664
Silverado12 Offline
Joined: Feb 2013
Posts: 3,664
Stuck wheel cylinder?

12 Chevy Silverado ext. cab LS, 2WD 4.3 auto
18 Mustang GT 5.0 auto
07 Harley Dyna Street Bob 96 c.i. 6 sp.
00 Mustang GT auto
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