20 Most Recent 2006 GMC Sierra 3500 - Page 3 Questions & Answers

Under hood, center, rear engine area, end of intake manifold, mounted in block. It looks like this:

Read this post. Sounds like the hydro boost or a check valve in the pump is most common.

http://www.dieselplace.com/forum/archive/index.php/t-196203.html

A Specific Order to what? We need more information to assist you.

its listed as a 6.6L LLY 402ci V8......i hope this helps

You are going to find the pump needs rebuilt

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Unless someone wired them to do that, which I doubt, I would check to make sure you pulled the proper fuse. That will kill the lights period. Let me know if this helps.

Speed sonsor on the tranny is bad.

Horn and dome light don't work on a 2001 GMC2500 4x4