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The fuel pump for a 2000 gm. Yukon does not have an inertia shut off. If there is no fuel then the pump or pump relay could be bad.
There is none.
There is no fuel pump shut off on most gm but you can take the fuel pump relay out or the fuse and crank the motor to relive the line pressure.
No there is not. But you can remove the fuel pump fuse to kill the pump.
Turn off the fuel supply
Have your blower motor resistor or blower motor checked out
on the back
Not sure what a fuel shut off valve is on a 2000 Lesabre. There is a fuel pump relay, a fuel pressure regulator, a fuel pump, fuel injectors, a fuel filter, but no fuel shut off valve.
No make, no model, and no year = no answer.
On a 2000 Lincoln LS : The fuel pump shut off switch ( inertia switch ) is located in the drivers foot well , behind the kick panel ( there is an access hole )
Chevrolet does not use inertia or shut off switches.
The problem you describe might be caused by a vacuum leak in the power brake booster.