95 Chevy cavalier

what is a quad driver module. I got a code 27 which is a quad driver module 1 fault. What if any tests can i run and where is this located.The car runs and starts fine with code

Code 27 OBD 1, Quad Drivers are part of the PCM. Reset the CEL and see if it triggers again. If the PCM is defective, it will need to be checked at a dealer or shop with computer equipment.