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  1. Possible vacuum leak troubleshooting?

    General
    So I have been noticing some rough brake performance at times, and an on again off again P0171 MIL on my 06 TB. It runs perfectly fine sometimes, but others it does. There's a small high pitched noise under the hood, not sure from where though. The brake booster isn't making any noise though as...
  2. New Trailblazer - CPAS?

    OEM Issues
    Hello everyone! This is my first post here. I just got a 2004 Trailblazer LS with 126K miles a couple of days ago. It ran fine but I was bored so I started doing some of the stuff listed on this site. So far I've cleaned the throttle body (unhooked the battery for about 2 hours), put a new air...
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