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  1. Do you have to remove exhaust manifold to remove cylinder head?

    OEM Issues
    Hi All, New to this site...lots of great info here. I did some searching, but can't find an answer to my question. I bought an '06 GMC Envoy XL and only drove it 100 miles before the check engine light came on with a misfire on cylinder 6. Diagnosed it as a bad lifter (AFM) and observed the...
  2. [SOLVED] Broken Head Bolts Solution

    The "How-To" and DIY Section
    So I have seen several posts all over about GM broken TTY bolts. I have been an auto mechanic for 20 years, most as private fleet mechanic. This is the first time I have encountered this problem with head bolts. I took the head off of a 2006 4.2 L6 because of bad valves. I tried the hammer and...
  3. How to Replace Trailblazer Headlights

    Hey guys, I saw a lot of poor videos (no speaking, dark, too long, etc) on how to replace the headlights on a trailblazer, so I made my own. I tried to be concise and make it so anyone who wants to do this job can follow my video and get it done. Let me know what you think...