Bonneville V6-231 3.8L VIN 3 SFI (1988)
Evaporator Case: All Technical Service Bulletins
A/C - Emitting Odors
Bulletin Number:
90-1-6
Reference Number:
811204R
Publish Date:
2/90
Subject:
A/C ODOR (CLEANING PROCEDURE)
Models
Affected:
1988-90 SUNBIRD AND GRAND AM AND 1987-90 BONNEVILLE
This bulletin cancels and replaces bulletin 89-1-3 issued 11/88. This bulletin has been revised to include 1990 Bonneville and add 1988-1990 Sunbird
and Grand Am modeLs. Also, and to add Figure 4.
Some vehicles may experience odors emitted from the air conditioning system primarily at start up in hot, humid climates. This odor may be the result of
debris in the heater/evaporator case and/or microbial growth on the evaporator core. To repair this condition, the following equipment and procedure
should be used:
Required Equipment:
^
GM Goodwrench Air Conditioning System Disinfectant Kit, P/N 25533404
^
Kent-Moore tool J-36645 Air Conditioning System Cleaning Gun
^
Rubber gloves
^
Safety goggles (ordinary safety glasses are not sufficient)
^
Pedestal fan
^
Afterblow Module, P/N 25533406
Parts are currently available from GMSPO.
CAUTION:
This procedure should only be performed on a cold car. It has been demonstrated that irritating vapors will be formed in the engine
compartment if the disinfectant coming out of the drain outlet contacts hot engine components.
Disinfectant can cause substantial, but temporary, eye injury. Do not get in eyes or on clothing. Wash thoroughly with soap and water after handling.
First Aid:
If disinfectant gets into eyes, hold eyelids open and flush with a steady, gentle stream of water for 15 minutes. Obtain
medical attention if irritation persists.
Procedure:
1.
Put on rubber gloves and safety goggles.
2.
Pour the small bottle of Goodwrench Air Conditioning System Disinfectant Kit, P/N 25533404, into the large bottle. Seal and invert the large
container once or twice to mix contents.
3.
Connect battery charger and charge during cleaning to avoid draining the battery.
4.
Remove resistor block as described in the appropriate Service Information Manual leaving wiring connectors attached to gain access to the
evaporator core face closest to the blower motor.
CAUTION:
Resistor block heat sink may be hot.
NOTICE:
Do not allow the metal coils of the blower resistor to become grounded to any metal surface as this may result in internal circuitry
damage.