Unlike Fords, Chevrolets do not have an emergency cutoff switch.
There is NO emergency cutoff switch on ANY s-series. The ignition key is the only "switch"
GM vehicles are not equipped with an inertia switch.
The 1999 Chevy Monte Carlo does have an emergency fuel cutoff switch. The emergency fuel cutoff switch can be found in the fuse box.
The fuel cutoff switch, on your 1998 Chevrolet Blazer, can be found on top of the fuel injector pump. The fuel injector pump is on the back side of the engine near the top.
It does not have a fuel cutoff switch, you have to remove the fuel pump relay to disable the fuel pump.
There is an inertia switch / fuel cutoff switch in behind the trunk liner , on the left side of the trunk ( there is an access hole )
It does not have one.
It does not have a fuel pump cutoff switch.
there is no cut off switch on a 1999 gmc sonoma
There is not a fuel cutoff switch or button on a Chevrolet.
I think it would be the same as a 1993, in which case it is located on the left hand side of the trunk, by the hinge.
The fuel pump shut off switch ( inertia switch ) is in the front passenger footwell by the kick panel on a 2003 Ford Explorer Sport