what port do i use to recharge my a/c on my 1998 chevy cavalier z24. blue or green
It will be the low pressure line. If using a recharge kit it will only fit that line. If yours was originally a r-12 model you will need to by a conversion kit for r-134. They are about ten dollars.
A 1998 model GM will be R134a. GM made the switch beginning 1994. It's the service port on or near the accumulator. The accumulator is the large silver can looking thing on the passenger's side with two hoses hooked to it. Remove the black (if still original) plastic cap and press your charging hose onto it once you've attached the valve to the charging hose. Your hose will have a collar on it. Pull up on the collar, press the hose onto the service port, the release the collar. HTH. -Jim
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