2007 Chevy Silverado 2500 HD. I was driving and my digital dashboard reported engine hot and AC turned off. My temperature gauge read cool. What do I need to replace?

SOURCE: replacing pcv valve

driver side valve cover in the back of the cover. if it even has one, sometimes the cover has been replaced with a later style that uses a baffle instead of a pcv

SOURCE: 2007 chevy silverado 2500 hd duramax shut down

mo me it sounds like low fuel volume i would check my lift pump

SOURCE: Drain Engine Coolant in 2005 Chevy Silverado 2500 HD

there is a petcock at the bottom of the rad drain ti from there and use a antifreeze tester to check protection temp

SOURCE: how about advise on a 2003 chevy silverado 2500 hd

The instructions are below. Also, there will be a diagram for the routing.

1. Before you begin, visually confirm the belt routing to the engine compartment label (if present) or to the appropriate diagram in this section (if the label is not present). If you cannot make a match (perhaps it is not the original motor for this vehicle), scribble your own diagram before proceeding.
   
2. Disconnect the negative battery cable for safety.
   
3. Install the appropriate sized breaker bar, wrench, or socket to the tensioner arm or pulley, as applicable.
   
4. Rotate the tensioner to the left (counterclockwise) and slip the belt from the tensioner pulley.
   
5. Once the belt is free from the tensioner, CAREFULLY rotate the tensioner back into position. DO NOT allow the tensioner to suddenly snap into place or damage could occur to the assembly.
   
6. Slip the belt from the remaining pulleys (this can get difficult is there is little room between the radiator/fan assembly and the accessory pulleys. Work slowly and be patient.
   
7. Once the belt is free, remove it from the engine compartment.
   

1. Route the belt over all the pulleys except the water pump and/or the tensioner. Refer to the routing illustration that you identified as a match before beginning.
   
2. Rotate the tensioner pulley to the left (counterclockwise) and hold it while you finish slipping the belt into position. Slowly allow the tensioner into contact with the belt.
   
3. Check to see if the correct V-groove tracking is around each pulley.
   

Jeffrey Turcotte

• 8991 Answers
• Posted on Sep 10, 2010

SOURCE: display reads engine hot a/c

Sounds like your temperature sending unit is bad. If you need instructions for replacing the sensor, please let us know.