Chervorlet 1999 express van 1500

You can find them here. See

Wiring schematics for 1999 Chevrolet Express van Google Search

The Catalytic Convertor is probably clogged-up and needs to be replaced.

Sometimes it may take a while.Make sure he is keeping pressure on the pedal while u are loosining the bleeder screw.U can loosen all and let gravity take over for a while but it takes some time.

Inside the van, all the way to the rear, on the side, will have a nice looking panel over it, remove panel and you'll see blower motor, held on with about 6 small screw's.

bad master cylinder seal must replace master cylinder

what guage ? temp guage or pressure guage?

is the fan motor putting out any air movement at all ? if the front ac works fine and only the rear is not working it should point either controls for the rear or rear fan motor not working... make sure you check rear contols as well as the main console control...

check the ac fuse and relays, check the a/c pressure switch

Are the brake shoes on right, there are two size shoes, One shoe has a longer brake lining then the other. The short brake lining is towards the front of the van and the longer brake lining is towards the rear. The rear brakes also may need to be adjusted, you can do that by going in revers in a empty parking lot and push the brakes as hard as you can to stop the van. Don't give your self a whip lash, just push down gradually and as far to the floor you can about 7 to 10 times. The self adjusters should adjust the brake on both sides, try this first before you take the brakes apart again. It may just need a adjustment and after that check the brake fluid in the master cylinder. Good luck and hope this helps. Keep me posted, be glad to help

ONE SUGGESTION COULD BE TO SWAP THE RELAY FOR ANOTHER TO SEE IF THIS FIXES THE PROBLEM. IF IT DOESN'T, THEN PERHAPS THE COMPRESSOR CLUTCH IS STUCK IN THE CLOSED POSITION. UNPLUG THE CLUTCH TO SEE IF THE COMPRESSOR STOPS. HOPE THIS HELPS. PLEASE KEEP ME POSTED. THANKS FOR USING FIX-YA AND FOR AN HONEST RATING. GOOD LUCK

Probably plugged or failed expansion valve on rear evaporator. Both front and rear are plumbed in parallel so if the front is cold, a problem with refrigerant flow at back unit almost has to be in the expansion valve.