Air suspection problem

there is many contacts in the ignition switch sounds like the switch is bad

Possible fuel filter, fuel pump issue. Check out these items and let me know what you find.
I hope this info helps!~subyguru~

Sounds like neutral safety switch is shorted or jammed. RE: check engine light, stop by any good parts store like Autozone, Advance, etc.. and have them do an OBII scan (fault scan) that'll point you in right direction for finding defective parts. While there, have them show you neutral safety switch - it's hard to describe...

because when the engine is shut off, the oil pump is also shut off, therefore no oil pressure. no problem here!

disconnect harness to the pump and jump with test light, turn key on and the light should go on for a few seconds

u need to change/service the air compressor in ur car.
or it might be the air bags/sensors thats located next to the rear tires.

hummer h2 hydraulic keeps running depleting battery.

check for faulty load leveler valves for the rear suspension
the compressor should cut out when the pressure is attained and no suspension movement requires air

if you park the car for few hrs, do u see the rear part going down ?
while the air compressor working, do u hear a leak in the air suspensions every few min ? (it can be clearly heard)

take it to a scrapyard and recycle it,and buy a nice small VW diesel or ford fiesta and stop pollouting the planet ,not forgetting the bicycle rack on the back for town use ,easy parking with bicycle.Leaking air bags or a faulty non return valve,first option the best