Howw do you insert the freon in a 2000 blazer?

There are 2 small tubes coming from the firewall. There is a screw that has the letter H and one has the letter L. Unscrew the L and plug in the freon.and if you cant find the tubes. just follow the lines from the comprssure, to the tubes. have your engine . running. and have the ac on so it will take the can of freon and shake the can slightly while it is taking it to the low side. might need 2 cans but you can feel the cool . dont over load it.

This answer was edited by kbky11 140 days ago.

Reason: #

The L is for low side the h is for high side of compressor [ do not put freon in on the high side with engine running the can will blow up} put freon on low side only the low side will have larger tubing than high side ===the high side pressure can exceed 350 psi] other than that the instructions are the same ===the only time the high side is used for filling a/c is with a calibrated charge tool on a totaly evavuated system and without engin running