2001 Chevy Tahoe emergency shut off fuel switch where is it located 5.3 Vortec 4 wheel drive Z71

did you have the passlock unit flashed to your vehicle

Hello. Yes, your Chevrolet's security system will 'shut-down' the ignition system; causing your truck to start but stop instantly. The truck 'thinks' it is being 'stolen' and will 'enable' it's security system to 'hamper' stealing it. Good luck and keep me informed; if you want to.

That sounds like your timing belt.

Any recent engine repairs ? Trouble codes ?

Speed sensor for the ABS system or for the speedometer?

If the speedometer and it is four wheel drive than the speed sensor will be in the rear housing of the transfer case.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

starter solenoid is usually located on the starter on all GM products. There is also a starter relay in the fuse box located under the hood of your particular vehicle.

you can first check the bulbs. you can turn on the 4-way flasher to quickly check the turn signal lamps. depending on the year of the truck, you might have a combi switch. the turn signal and wiper controls on the same lever. if they are, you might have a bad connection to the switch or a worn switch assembly. check the brake lamp switch, located at the brake pedal lever. if you have cruse control there will be two switches at that location.
check the fuel pump relay. when you replace the fuel pump make sure you get the correct pump for the truck and engine application. these fuel pumps are in the fuel tank and are keep cool from the fuel. if you constantly run with a 1/4 tank or less it will shorten it's life.

Check your steering rack.The lines could be leaking going into it. Or the rack itself is.

the solinoid that opens the and closes the 4 wheel drive is eather stuck or broken

the abs system stops working at 3mph(approx)it wiil not stop the wheels from locking up at low speed(3mph)to check abs working, take car upto 40 mph then, stand on the brake pedal, should feel like a machine gun going off under your foot,it helps you stop in a steered manner.if you do this in the wet,you will notice the wheels skid at the low end.some makers have a switch to tyrn the abs off(in snow)