This truck will start and run decent if I unplug the coolant temp sensor. Data is good on scanner if I plug in the CTS engine [...] CTS unplugged data shows -35 degs. I have 5V ref. on yellow wire and ground on the black. I have tried another A/C delco coolant...

FIX posted 2/27/2008

iATN Members:
Login to view full TechHelp request
Auto Repair Pros:
Join iATN to read this TechHelp request
Vehicle Owners:
Find a nearby iATN member to repair your vehicle