I have a 2003 GMC Duramax with 171,000 km and no prior problems.
Had an Edge chip installed last Spring '05. I am seeing too much white smoke coming out of the tail pipe (even when the truck is idling).
The truck is used for work and sometimes hauls a 22' trailer (7 ton load)
Air flow is not restricted but I am planning to replace the air filter to let in more air.
I am using Stanadyne fuel conditioner
The truck is not using oil nor is it leaking oil anywhere.
Power is good and oil pressure is good
Anyone have any suggestions before I go to the dealer and spent money on troubleshooting?

thanks,

Eltjo

PS The smoke is not as bad as dmaxalli Tech showed in his pictures on July 23, 2005