2001 Chevy tracker Air Cond

Okay, if you go to an auto part store - by a can of R-134a with the gauge on it. Start your tracker and put the A/C on Full Blast. Hook up the can or refridgerant to the LOW side (it's the larger piping for teh A/C should have a gray screw on cap. it's located on the left side under the hood). Now DON"T start refilling it... see what it says on teh guage. Also check yoru compressor. It is the bottom right pully> The pully should spin freely but there is like a cap on the front of the pully, when the compressor engauges that should spin too. If it says your low, start filling it with the refidgerant turning the can upside down and then to the right about 120 degrees then back upside down. until it reads full (in the blue range about 25 - 45) it it is showing more than that or whatever, go to a mechanic... Or you could try a dye kit that you can get at an auto parts store where you put a UV dye in it and then use a blacklight or UV flashlight to detect if there is a leak in yoru system.

Hope this helps.