can not find blower motor resisitor on 2000 Oldsmobile Bravada

can not find blower motor resisitor under the hood wondering if anyone knows where it is.

The Blower motor resistor is in the engine compartment looking in from the radiator is left of center toward the passenger side, in the heater housing. On model possibly by VIN number has the module located in the heater box housing at 90 degrees to the heater box another has it located on top of the heater box (yet in the engine compartment). The wires on either module are colored brown, tan, light blue, and dark blue.

what if it has ATC??? Is there a resistor???
Thanks a $$$$$