The heater resistor on a 94 Astro is located on the top of the heater box under the hood, it has a four or five wire plug on it and two 6mm screws hold it in a hole in the heater blower box.
It is attached to the front of the A/C - heater box, mounted kind of low, held in by two screws.
You can find the block heater cord behind the grill of your 2001 Chevy Astro. The cord will be on the drivers side of the grill.
heater sensor circuit Chevy astro 2000
it's behind the washer bottle
If you are referring to the blower motor resistor, it is located behind the glove box and in the heater case.
Under hood passenger side near fender
How do you change a heater core in 1994 chevy astro van?
It should be located at the passenger side under the instrument panel area next to the heater control box
It is located behind the coolant and windshield washer reservoirs. The two wires on the blower motor will lead you to it.
There are heater-resistance wires in the glass of the back windshield.
to the left of the blower motor. It's on the left side of the engine compartment
Open the hood and it is on the left (passenger) side near the coolant reservoir.