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Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 1667
Experience:  GM Grand Master Technician 2007. 14 year experience.
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GMC suburban K1500: AC problems, when it's relatively cool

Customer Question

AC problems, when it's relatively cool outside, approx less than 75, the air can come on. but when its hot out, the air won't come on. I replaced the relay, same problem. When I jumper the relay, the ac works, but ofcourse there is no low cutout. Can't figure what's going on
Submitted: 1 year ago.
Category: GMC
Expert:  Gary replied 1 year ago.
can you tell me what year this is ?
Customer: replied 1 year ago.

97

Expert:  Gary replied 1 year ago.
the R134 is full in the system ?
Customer: replied 1 year ago.

yes

Expert:  Gary replied 1 year ago.
with the truck on and the ac set to on if you unplug the low switch on the accumulator and jump the 2 terminals in the connector will the compressor turn on ?
Customer: replied 1 year ago.

with the relay in or out?

Expert:  Gary replied 1 year ago.
relay in
truck on and ac set to on