RAM 3500 Truck 2WD V8-5.7L (2008)
5. Disconnect the heater hoses from the heater core tubes.
6. Remove the powertrain control module (PCM) to gain access to the two nuts (3) that secure the HVAC housing (1) to the engine compartment side
of the dash panel (2) and remove the nuts See: Powertrain Management/Computers and Control Systems/Engine Control Module/Service and
Repair/Powertrain Control Module - Removal .
7. On Mega Cab models, remove the floor console duct See: Air Duct/Service and Repair/Floor Console Ducts/Removal .
8. Remove the instrument panel from the passenger compartment See: Body and Frame/Interior Moulding / Trim/Dashboard / Instrument
Panel/Service and Repair/Instrument Panel - Removal .
9. Remove the bolt (5) that secures the HVAC housing (4) to the floor bracket (6).
10. Remove the two nuts (3 and 7) that secure the HVAC housing to the passenger compartment side of the dash panel (1).
11. Pull the HVAC housing assembly rearward and remove the housing assembly from the passenger compartment.
12. If required, remove the fresh air inlet (2) from the dash panel (1).
HVAC Housing - Installation
HVAC HOUSING ASSEMBLY
CAUTION: Be certain to adjust the refrigerant oil level when servicing the A/C refrigerant system See: Service and Repair/Refrigerant Oil
Level. Failure to properly adjust the refrigerant oil level will prevent the A/C system from operating as designed and can cause serious A/C
compressor damage.
NOTE: When replacing multiple A/C system components, refer to the Refrigerant Oil Capacities chart to determine how much oil should be
added to the refrigerant system See: Service and Repair/Refrigerant Oil Level.
NOTE: If the A/C evaporator is being replaced, add 60 milliliters (2 fluid ounces) of refrigerant oil to the refrigerant system. Use only
refrigerant oil of the type recommended for the A/C compressor in the vehicle.
NOTE: Replacement of the refrigerant line O-ring seals and gaskets is required anytime a refrigerant line is opened. Failure to replace the
rubber O-ring seals and metal gaskets could result in a refrigerant system leak.
1. If removed, install the fresh air inlet (2) onto the dash panel (1).
2. Position the HVAC housing assembly (4) into the passenger compartment with the mounting studs and the condensate drain tube in their proper
