20 Most Recent 1996 Chevrolet Express - Page 9 Questions & Answers

there is a switch to turn it on while driveing see if is on or the switch on the door could be bad

wireing harness short

From Gates Automotive

The AC orifice is a metered hole has a screen filter and it should never need replacing unless the system has some kind of failure like a compressor that is coming apart and piston fragments are getting into the orifice. The Orifice is located at the inlet tube to the AC Evaporator core on the firewall on the passengers side on most GM cars and trucks.

the only solution for that is to check your switch. Using your electrical tester when the switch is in off position check connectivity in ohms, if there is a connection it means faulty switch. Replace the switch. If the switch is ok then check the wiring going to the motor, the wire might be grounded. what i mean is that something bypass the connection, when you find it just take it out or cover it with electrical tape or insulation to cover open wire.

if they are 16inch tires I don't see a problem other than it may affect your speedo reading

check egr may be stuck open brake booster could have a leak internally. check pcv valve and all vacuum hoses for leak

Here is a very complete trouble fault table, where you may find the answer.