Service Procedure, Parts Info and Warranty Info

OWNER NOTIFICATION

Owners will be notified of this campaign on their vehicles by GMC Truck Division (see copy of owner letter included with this bulletin). A listing of owner names and addresses has been furnished to the involved dealers to enable dealers to follow up with owners involved in this campaign. This listing may contain owner names and addresses obtained from State Motor Vehicle Registration records. The use of such motor vehicle registration data for any other purpose is a violation of law in several states. Accordingly. you are urged to limit the use of this listing to this campaign.

SERVICE PROCEDURE

1. Disconnect the negative battery cable.

2. Remove the upper fan shroud.





3. Remove the fan and clutch assembly by removing the four (4) nuts (Figure 1, "7").

4. Remove the fan from the clutch by removing the tour (4) bolts (Figure 1, "4"), discard the used bolts and fan.

Important
INSPECT ALL THE MOUNTING SURFACES FOR GOUGES, BURRS OR OTHER INCONSISTENCIES. THE MOUNTING SURFACES SHOULD BE CLEAN AND FLAT VISUALLY INSPECT THE WATER PUMP HUB RUNOUT TO INSURE IT IS NOT BENT

5. Install the new fan assembly (Figure 1, "2") using the four (4) bolts provided (Figure 1, to the clutch (Figure 1, "6"). Torque the bolts to 19 N-m (14 lbs.ft.).

6. Connect the fan and fan clutch to the pulley (Figure 1). Torque the nuts to 24 N-m (17 lbs.ft.).





NOTE:
TO MAINTAIN A BALANCED ASSEMBLY ALIGN THE YELLOW PAINT MARK ON THE FAN CLUTCH WITH THE YELLOW PAINT MARK ON THE WATER PUMP HUB (Figure 2).

7. Replace the upper fan shroud.

8. Connect negative battery cable.

9. Install "Campaign Identification Label."

PARTS INFORMATION





Parts are to be obtained from General Motors Service Parts Operation (GMSPO). To ensure that these parts will be obtained as soon as possible, they should be ordered from GMSPO on a C.I.O. order with no special instruction code but order under an advise code (2).

WARRANTY INFORMATION





Dealers should submit an accurately filled out Warranty Repair Order on each vehicle completed under this campaign.

CAMPAIGN IDENTIFICATION LABEL

Each vehicle corrected in accordance with the instructions outlined in this product campaign bulletin will require a "Campaign Identification Label". Each label provides a space to include the campaign number and five (5) digit dealer code of the dealer performing the campaign service. This information may be inserted with a typewriter or ball point pen.

Each "Campaign Identification Label" is to be located on the radiator core support in an area which will be visible when the vehicle is brought in for periodic servicing by the owner.

Apply "Campaign Identification Label" only on a clean, dry surface.

ADMINISTRATIVE PROCEDURE

Procedures covering this campaign are outlined in Section V of your dealership's "GM Truck Claims Processing Manual" # P9119.