Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hello and good evening. It sounds like the air conditioning compressor is starting to seize up. If it's enough to burden the engine when cruising, it is certainly enough to cause it to stall when at idle. On the compressor itself, with the truck off, see if you can turn the center of the compressor pulley be hand. That is the actual portion that is connected to the compressor. If it very stiff to turn, the compressor is to blame. Let me know what you see.
Your JA Expert,
When you are looking at the engine, this will be located towards to lower portion of the engine on the driver's side.
Attachments are only available to registered users.
You are welcome Michael. Let me know what happens. Have a good night.
That is very nice of him. Here is what I would like you to do first. Get a volt meter. Unplug the map sensor and measure the voltage you find on the 3 wires going to the map sensor. Do that again with the 2 wires on the camshaft positioning sensor. I want to make sure we have the proper reference voltage on one of the wires at each sensor. Here are pictures of their locations. They are easy to get to. Without the codes numbers, I can't be exactly sure what error the computer is seeing, but let's try this. If it comes down to replacing these two sensors, they are easy to access.