Truck died goin down the road and towed to GM.... was told the CP3 failed due to fuel contamination and not covered under warranty.... I was very pissed but used the oppurtunity to upgrade CP3 and while I had it apart threw on an ATS 4000 turbo kit. Put it all back together and same problem... should have never trusted GM to diagnose the truck as they are about as useful as a Hewlett Packett foreign computer helpline (only they speak english) So regardless... I was wondering if I could take it back to the dealer and see if they will replace ( i doubt it) will probably blame it on contaminated fuel again or some other bs thing and now that I have all the mods on it...... very unlikely!