I just purchased 2004 Envoy loaded all available options. Great shape had blown engine with 225k so I got a LQK engine with 60k miles on it. Rebuilt the trans. Put new Michelin's and Moto Metal rims on her. Now I have $7500 in it not to bad... BUT Now I noticed I have no e break! Continuous sequel in reverse and rotational sequel in forward at right rear tire. When break applied the noise diminishes to almost nothing. I assume it is the e shoes..?? Any tips would be appreciated. Thanks for all your advise! Sincerely Jeff Brychta