Is there a separate fan switch or does the ECM control the cooling fan? Mine works with the AC, but does not seem to turn on when the engine gets warm in stop and go traffic.
Any links to a wiring diagram?
Al
Various sensors and switches control the ecu which controls the relay which controls the fan. GM wiring diagrams are proprietary. Perhaps someone on here can scan the appropriate pages and email them to you. Either that or buy them. Does the fan turn on when the a/c is on? If not, you might try jumping the relay to see if the fan is any good. I don't know the relay location in that vehicle.
MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.