brakes squeal on 2009 Chevrolet Colorado

my truck has 15000 miles on it back brakes squeal my machanic at work said he ran in to the same problem same truck wore out rear drum breaks at 16000 told me that there were to many teeth on self adjusters

Asked by for the 2009 Chevrolet Colorado
have never heard of that. colorados have a common problem of pre mature wear out of rear brakes since it was made. the linings are very thin to start and the range of 15=20,000 miles is average replacement time.