I Just purchaced a 2008 colorado Z 71 2wd, extended cab, with the inline 5 cylinder engine. When I start it up it knocks really bad.
The chevy dealer said this is normal. Does anyone else have this problem. What should I do??????

My 06 does the same thing!

on the 06..maker sure it has a delco pf61 filter on it

Argon,

what filter is that?????