G 20 3/4 Ton Van V8-305 5.0L VIN H 4-bbl (1984)
11.
Remove evaporator core retaining screws and separate evaporator and blower inlet case sections.
12.
Remove evaporator core, blower motor and cage assembly from housing.
13.
Install former front A/C system blower speed control resistor, in new case, P/N 3054954, and torque retaining screws to 1.2-1.6 N-m (11-14
in.lbs.). This will provide increased rigidity to prevent cracking the new case when removing the knockout plug in Step 14.
14.
Carefully punch the rear A/C system blower speed control resistor knockout plug out of the new case. All pieces of this plug must be removed
from the opening. (See Figure No. 2).
15.
Install new rear A/C system blower speed control resistor, P/N 15591188, in the case. Torque the two retaining screws to 1.2-1.6 N-m (11-14
in.lbs.). Discard old resistor.
16.
Reinstall the evaporator core, blower motor and cage assembly, and relay on the new case.
17.
Assemble A/C evaporator case assembly halves using rope sealant, P/N 3008851 or equivalent, applied to the sealing surfaces of new case.
18.
Reinstall the A/C evaporator case assembly on the vehicle following the procedure in reverse. Reseal the case flange to the dash panel using rope
sealant, P/N 3008851 or equivalent.
19.
Evacuate and recharge the A/C system. Refer to the 1984 Light Duty Truck Service Manual (ST-330-84) for instructions.
Install campaign completion label upon completion of the inspection and/ or modification.
PARTS INFORMATION
Parts that are listed below are to be obtained from the Warehousing and Distribution Division of General Motors (WDDGM). To ensure that these parts
will be obtained as soon as possible, they should be ordered from WDDGM on a C.I.O. order with no special instruction code, but order on an advise
code (2).
All trucks involved in the campaign will require the following part:
Part Number
Quantity Per Vehicle
Description
15591188
1
Resistor
In addition, trucks requiring A/C evaporator inlet case replacement will need the following part:
Part Number
Quantity Per Vehicle
Description
3054954
1
Case, Inlet
Evaporator
3008851
A/R
Rope Sealant
CLAIM INFORMATION
Submit a Product Campaign Claim with the information indicated below:
Parts
Failed
Parts
Failure
Labor
Labor
*Other
Count
Part No.
Allowance
Code
Operation
Hours
Hours
1
15591188
00
V2310
.2
.1
DESCRIPTION:
Inspect A/C evaporator inlet case, remove resistor knockout plug and install new resistor according to the instructions contained
in this bulletin.
Parts
Failed
**Parts
Failure
Labor
Labor
*Other
Count
Part No.
Allowance
Code
Operation
Hours
Hours
2
3054954
13.17
00
V2311
1.9
.1
DESCRIPTION:
Inspect and replace A/C evaporator case, resistor and recharge A/C system according to the instructions contained in this
bulletin. (Gasoline Engine Only).
Parts
Failed
**Parts
Failure
Labor
Labor
*Other
