SOURCE: No cold air w/air conditioner on for a 2004 GMC Envoy.
Can't go by the pressure. Ck the large lone coming out of firewall, should be col. Small line at ac condensor in front of radiator should be hot.
Static pressure on high side probably 80psI Running 30 on the low side and 1130. will vary depending on oiutside temp Hope this hekoped
SOURCE: Electrical malfunctions in 2006 GMC Envoy XL
Check your ignition switch by checking the voltage at the fuses for affected circuts vs. other circuts that are working well...
SOURCE: Climate control air conditioner stops working due to incorrect ambient air temperature
Same car, same problem. Press MODE, FRONT and REAR buttons together to reset tempreture. You probably need to replace the sensor GM part number 15047946 it is in the front grill email me for a picture. [email protected]
SOURCE: 05' Sierra 1500 trailer break lights
try http://www.etrailer.com/faq-wiring.aspx. This should help. Make sure the lights and trailer are grounded. Especially with a tilt trailer. The tilt pins carry the ground. Run a ground strap from the frame to the bed.
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