[Jackie Gray]

I have an 03 Tahoe that' been acting up the past few days. Took it to AutoZone to have the CEL read.. showed a few codes and they recommended I change out the purge valve. After I changed it out the truck got worse. Now the whole engine bay is shaking and alot of white smoke coming out tailpipe that smells like raw fuel. It wasn' doing this pre replacement.. anyone ever experienced this? Any an all help would be greatly appreciated

 

[Beachbourbon]

What were the codes?

 

[Jackie Gray]

P0449, P0327, P0332, P0420, P0651

 

[RayVoy]

The shaking and raw fuel smell is causing the knock codes and the cat codes.

Do some tests on the vent circuit, maybe you have a broken/bare wire

 

[Jackie Gray]

Just noticed yellow wire has a small nic in it right at the head of the harness.. i dont know if theres enough there to splice it.. ill assume ill have to get this at the junkyard? Or order it and wait a few dayz

 

[RayVoy]

A small nick isn't going to hurt anything, is the wire cut through?

 

[BillD64]

Over a month late in the reply but maybe this will help. I have attached a PDF file with the GM Diagnostic Instructions for the codes listed. These were taken from the 2003 Tahoe Factory Service Manual.

Bill