K 1500 Suburban 4WD V8-5.3L VIN Z Flex Fuel (2003)
16. Remove the fasteners (2,4) retaining the auxiliary HVAC module to the vehicle.
17. Remove the auxiliary HVAC module (3) from the vehicle.
INSTALLATION PROCEDURE
1. Install the auxiliary HVAC module assembly (3) to the vehicle.
2. Install the two bolts (2,4) inside the vehicle in order to retain the auxiliary HVAC module to the vehicle.
3. Install the air distributor duct (3).
4. Install the fastener (4).