K 2500 Suburban 4WD V8-6.0L VIN U (2001)
15. Remove the fasteners (2,4) retaining the rear auxiliary HVAC module to the vehicle.
16. Remove the rear auxiliary HVAC module (3) from the vehicle and place it on a work surface.
17. Remove the air temperature actuator (1) from the module.
18. Remove the stud on the underside of the rear HVAC module between the heater core inlet and outlet pipes.
19. Carefully separate the heater core pipe gasket from the module case and remove the heater core pipe retainer.
20. Remove the rear HVAC module lower cover.
