Odors may be emitted from the air conditioning system at
startup in hot climates. Debris in the heater/evaporator case or growth of
mold on the evaporator core may cause odors. A service kit is available
through GMSPO.
A single application of this deodorizer, GM P/N 12377951,
will remove the odor from the air conditioning system. However, in order
to prevent the odor from returning, enabling the blower control function
with the scan tool is recommended. Refer to
Afterblow Enabling
.
- Clear all debris from the plenum that draws air from the outside.
- Disconnect the clutch coil. This will disable the A/C compressor
clutch operation.
- Dry the evaporator core by turning the engine on. In addition,
run the blower motor on high and in a recirculating mode, with the temperature
control on maximum heat for 10 minutes.
- Drill a 3.175 mm
(1/8 in) hole (1) in the HVAC module at the recessed area above
the gas pedal as shown.
Important: Use safety goggles and latex gloves for the following step.
- Keep the blower motor on high and insert the extension tube of
the deodorizer, GM P/N 12377951, into the hole past the mark
on the tube.
- Spray the area with short bursts. Dispense the contents of the
can over a 2-3 minute period. Vary the direction of the spray into the
duct.
- Turn the engine off.
- Let the engine sit for 3-5 minutes.
- Seal the 3.175 mm (1/8 in) hole with body
sealer or with RTV gasket compound.
- Start the engine and run the fan on high for 15-20 minutes
in order to dry the sealant.
- Reconnect the air conditioning compressor clutch coil and verify
the operation.