At start up, I am hearing a Rattling noise or a vibration type sound coming from the front of the engine. It goes away after a few minutes. I do know it is almost quiet right after an oil change. It is not a tapping or knock, it is a sound new to me with engines. This 04 Colorado has over 166...

Hi everyone. I've searched the forums for this issue and I can't find my particular problem. Some background to the problem: Yesterday, the idle on my 2005 GMC Canyon 3.5 was super rough. I went through the motions: 1) Ran diagnostic, cleared computer, ran again. 2) Cleaned throttle body. 3)...