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A factory GM system which uses R134a Freon...........
Smartrak is a awd system and can't be turned on and off. The computer senses slipage and engages the front axle as need for awd.
I have an 2003 Bravada and there is no way to turn the air bags off You CANNOT turn the air bag system off. You may be able to turn the passenger air bag off. Check with a GM dealer or the owner's manual.
I have an 02 Olds Bravada and my compressor quit working. I took it to a mechanic and for 150.00 he replaced the air bag system with coil springs. Much better in my opinion.
Assuming this vehicle has the 4.3 V6 engine, the coil wire is connected to the passenger side rear of the distributor cap and the other end is connected to the ignition coil on the top passenger side of the engine.
go to a mechanic?
De-leveling the System - 2012 was released on: USA: November 2012
An automatic leveling system is a suspension system which automatically adjusts front and rear ride heights to compensate for changes in axle load.
It could have load leveling shocks in the rear.
There is no air valve for the rear air suspension as it is controlled by an auto-leveling system unless of course you change to manual fill air shocks then it could be anywhere.
Replace the thermostat and radiator cap.
2018 suberban