I have a 2002 Tahoe Z71 with a 5.3 engine. I am looking for the location of the coolant temp sensor. The temp guage fluctuates as if there is a short in the wire. When this (fluctuation) is going on the Tahoe surges. When the temp guage goes back to normal - the surging has stopped. I want to run down the wire from the coolant sensor to the dash guage. Open to any other ideas... Thanks for the help!

 

the sending unit is on the driver side cylinder head..you mightr have a bad ground check battery cables as well

 

I'd recommend spending 15- 20 bucks and get Yourself a Haynes or Chiltons Manual on Your Vehicle. It'll save You alot of headaches down the road.

 

Some public libraries carry copies of service manuals.