Yes, you can change between 4WD, auto or 2WD at any speed. Only when setting LOW 4WD you must stop. Remember, when you set this position you only can drive straight.
Turn real sharp while moving and see if you feel the front wheels jerking
mine died because of a faulty fuel pump
NO !
Start with changing the fuel filter.
You Probley have a blowed head gasket.
Check fuel pressure, fuel pressure regulator.
Why will my abs break light and seat belt light stay lite on the dash of a 2003 chevy Tahoe while the motor is running? Please help. Thank you.
Yes. It prevents the motor from from turning over while in gear.
Possible bad fuel pump, fuel pressure regulator. Give more symptoms
Yes. The switch prevents the car from turning over while in gear.
Yes, it is a shift on the fly system.
The oil pressure gauge will fluctuate on a Chevy Tahoe when the vehicle is idling and when the vehicle is driven at highway speed. Idle is usually 30 psi oil pressure or slightly more. At highway speed, the oil pressure should be between 60 psi and 80 psi.