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Travis, GMC Technician
Category: GM
Satisfied Customers: 980
Experience:  7+ years of GM dealership experience, GM ASEP trained, Assoc. Degree in Auto. Tech.
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1996 gmc: the ac recharge port

Resolved Question:

where is the ac recharge port on a 1996 gmc jimmy and how hard is this process ? any precautions ?
Submitted: 8 years ago.
Category: GM
Expert:  Travis replied 8 years ago.
Thanks for the question.

Are you attempting a refill of the system with an aftermarket refill kit?
Customer: replied 8 years ago.
Yes-I bought a can of R-134a coolant at Wal Mart and need to know where the refill valve is on the engine.
Expert:  Travis replied 8 years ago.
Ok, the directions should be saying something to the effect of connecting to the low pressure/side port.

Make sure the valve on the refill container is closed prior to connecting it to the car. Other then that, it is pretty striaght forward. Just go by what the can says.
Customer: replied 8 years ago.
The gage on the can fluctuated from green to yellow which indicated a system problem. also heard a clicking while the gae ws fluctuating. Any idea what is happening ?
Expert:  Travis replied 8 years ago.
Are you doing this with the Jimmy running?
Customer: replied 8 years ago.
yes the engine was running and the clicking was coming from an area on top of the engine
Expert:  Travis replied 8 years ago.
The clicking is usually the compressor coming on and off, which would cause the gauge to fluctuate.
I would allow the can to remain on there for a while. The clicking noise may start out going on and off quickly, and the longer the can is on there, or the more pressure that enters the system, will cause the clicking to slow down.
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