[smatsu]

I have a 2001 Silverado and it won't start up on the first attempt when its cold, and when it does there is a tap until it warms up. The dealer said the tap was normal but it never used to do it. Any suggestions?

 

[TrailLeadr]

We've also got a light rap when the engine is cold on our '02 Avalanche. I wouldn't say it's normal. To me it's the sound of a worn main bearing. Unless it gets louder, or persists after engine warm up, I wouldn't worry about it too much, but know that in time it may develop into a persistent knock. By "in time" I mean with proper maintenance, you probably won't have any real problems directly linked the to tap for at least another 5 years minimum. But I'm not promising anything either. Be good to your engine, and take care of it, and the tap should only be a minor nuisance.

 

[bigbass140]

read this post it sounds like the same thing we were already talking about

http://www.gmtruckclub.com/forum/showthread.php?t=3658