Installation Procedure

Fig 1: View Of HVAC Module, Nuts & Bolts

Courtesy of GENERAL MOTORS CORP.

If replacing the HVAC module, transfer the components from the old HVAC module as necessary.
Install the HVAC module (3).

CAUTION: Refer to Fastener Caution .

Install the nuts (2) to the HVAC module (3) and tighten to 9 N.m (80 lb in).
Install the bolts (1) to the HVAC module (3) and tighten to 4 N.m (35 lb in).
Reposition acoustic foam (if applicable) to original position or cover access hole with equivalent foam tape (1).
Connect the electrical harness and the ground connections.
Install the HVAC module drain hose.
Install the instrument panel. Refer to Instrument Panel Service Positioning (With SLT) or Instrument Panel Service Positioning (Cadillac) .
Install the upper intake manifold sight shield. Refer to Upper Intake Manifold Sight Shield Replacement .
Install the battery. Refer to Battery Replacement .
Install the accumulator. Refer to Air Conditioning Accumulator Replacement (HP2) or Air Conditioning Accumulator Replacement (Non-HP2) .

Fig 2: Identifying Heater Hose To Heater Core Fittings

Courtesy of GENERAL MOTORS CORP.

Install the surge tank outlet hose to the heater core.
Firmly push the quick connect onto the heater core pipe until you hear an audible click.
Install the inlet heater hose to the heater core.
Firmly push the quick connect onto the heater core pipe until you hear an audible click.
Fill the engine coolant. Refer to Cooling System Draining and Filling (Static Fill) .