OEM 2008 GMC Yukon HVAC Control Module

2008 GMC Yukon HVAC Control Module Parts and Q&A

• Q: How to replace the auxiliary HVAC Control Module on 2008 GMC Yukon?

  A: To replace the auxiliary HVAC module in a tahoe, yukon, or escalade, recover the refrigerant from the A/C system and drain the engine coolant first. Lift up the vehicle and detach the heater lines (2, 3) and air conditioning lines (4, 5) from the auxiliary HVAC module located under the vehicle. Remove the nuts from the studs, securing the module, then drop the vehicle and remove the right rear quarter trim panel. Sheed the upper auxiliary air duct, remove the fastener for the upper auxiliary air duct, and carefully slide the duct up into the headliner then disconnect the electrical connectors from the auxiliary HVAC module. Take out the fasteners that hold the auxiliary HVAC module in place and remove the module from the vehicle. For installation, return the auxiliary HVAC module assembly back into the vehicle, home it in with 2 bolts. In the vehicle. Replace fastener , reconnect electrical connectors to auxiliary HVAC module, and install upper auxiliary air duct back on to air distributor duct. Replace the right rear quarter trim panel; hoist the vehicle again and mount the nuts that fasten auxiliary HVAC module torque to 9 N.m (80 lb in). Attach the air conditioning lines (4, 5) and the nut to the auxiliary HVAC module and tighten the nut to 16 N.m 12 lb ft) and install the heater lines (2, 3) at the underside of the vehicle. Lower the vehicle, check level of coolant, the engine, recharge the refrigerant, and lastly carry out a leakage test on the fittings using Halogen Leak Detector (J 39400-A).