CAMPAIGN:INOP. CANISTER PURGE (TVS) REPLACE SWITCH. GMC Truck Caballero 1984

For 1990-2009 cars

# CAMPAIGN:INOP. CANISTER PURGE (TVS) REPLACE SWITCH

#### MODELS: 1984 CABALLERO EQUIPPED WITH 3.8L (RPOLC3, VIN CODE 9), 5.0L (RPOL69, VIN CODE G),5.0L (RPO LG4, VIN CODE H),OR 5.7L (RPO LM1, VIN CODE 6) ENGINES

General Motors has determined that certain 1984 GMC Truck Caballero model vehicles may experience an inoperative canister purge Thermo Vacuum Switch (TVS). An inoperative canister purge TVS can adversely affect the intended function of the evaporative emission system.

To prevent the possibility of tbis condition occurring, tbe canister purge TVS will be replaced on all involved vehicles.

#### VEHICLES INVOLVED

Involved are all 1984 GMC Caballero model trucks equipped with 3.8L (RPO LC3, VIN Code 9), 5.0L (RPO L69, VIN Code G), 5.0L (RPO LG4, VIN Code H), or 5.7L (RPO LMl, VIN Code 6) engines produced from start-of-production 1984 model year through end-of-production 1984 model year.

The specific vehicles involved in this campaign have been identified by Vehicle Identification Number Computer Listings. These listings are furnished to all involved dealers with the campaign bulletin.

#### DEALER CAMPAIGN RESPONSIBILITY

Dealers are to service all vehicles subject to this campaign at no charge to owners, regardless of mileage, age of vehicle, or ownersbip, from this time forward.

Whenever a vehicle subject to this campaign is taken into your new or used vehicle inventory, or it is in your dealership for service in tbe future, you should take the steps necessary to ensure the campaign correction has been made before reselling or releasing the vehicle.

Owners of vehicles recently sold from your new vehicle inventory are to be contacted by the dealer and arrangements made to make the required correction according to instructions contained in this bulletin.

If no owner's name and address were available to GMC Truck Division at the time of campaign initiation, the dealer will determine tbe owner's name and address from the dealership sales records. Please provide this information directly on the second copy of the listing next to tbe applicable VIN so tbat our records may be updated and the appropriate notification mailed to the owner. This second copy should then be submitted to the address listed below in the previously supplied yellow campaign envelopes.

GMC Truck Division General Motors Corporation 101 Union Street Plymouth, Michigan 48170

#### 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 INFORMATION

If there is evidence of intentional disablement of the evaporative emission system, the dealer is to notify the vehicle owner of this condition and ask if he/she wants the system restored. The cost of such restoration will be the responsibility of the owner.

#### SERVICE PROCEDURE

1. Disconnect negative battery cable.

2. Drain coolant (save in clean container for reuse) to a level just below TVS.

3. Remove air cleaner.

4. Remove canister purge TVS (see illustration).

5. Coat new canister purge TVS (P/N 10055876) with thread sealant (P/N 1052080) and install.

6. Reinstall air cleaner

7. Refill coolant.

8. Reconnect negative battery cable.

#### 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 on an advise code (2).

Part Number Description Qty/Veh. ------ ----------- -------- 10055876 Thermo Vacuum Switch 1

To ensure parts availability upon initial owner request for vehicle correction, dealers are encouraged to order parts, based on attached involved vehicle listings, upon receipt of this bulletin.

#### WARRANTY INFORMATION

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

Labor Operation *Time Trouble Number Description Allowance Code ------ ----------- --------- ---- V4510 ReplaceThermo .3 Hr. 96 Vacuum Switch

*For dealer to receive Administrative Time Allowance associated with this campaign, add 0.1 hour to the Labor Operation Time Allowance.

#### 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 five (5) digit dealer code of the dealer performing tbe 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 "GMC Truck Claims Processing Manual" #P8719.

Dear GMC Truck Owner:

This notice is being sent to inform you that GMC Truck Division is conducting a recall campaign that includes your vehicle.

REASON FOR THIS RECALL

General Motors has determined that your 1984 GMC Truck may experience an inoperative canister purge Thermo Vacuum Switch (TVS). An inoperative canister purge TVS can adversely affect the intended function of the evaporative emission system on your vehicle.

WHAT WE WILL DO

To prevent the possibility of this condition occurring, the canister purge TVS will be replaced. This service will be completed for you at no charge.

WHAT YOU SHOULD DO

Please contact your GMC Truck dealer to arrange a servlce date. Instructions for making this correction have been sent to your dealer. The labor time necessary to perform this service is approximately twenty (20) minutes. Please ask your dealer if you wish to know how much additional time is needed to process your vehicle.

Should your dealer not schedule a service date within a reasonable time, you should contact your GMC Truck Zone Office by telephone for assistance. The telephone numbers of the Zone Offices are listed in your Owner's Manual.

If your dealer or GMC Truck Zone Office is unable to remedy this condition within a reasonable time, you may wish to advise the Environmental Protection Agency, at the following address: Director, Manufacturer's Operations Division (EN-340F), United States Environmental Protection Agency, 401 M Street, S.W., Washington, D.C. 20460. To ensure your full protection under the emission warranty made applicable to your vehicle by Federal law, and your right to participate in future recalls, it is recommended that you have your vehicle serviced as soon as possible. Failure to do so could legally be determined to be lack of proper maintenance of your vehicle. Also, your vehicle may fail a state or local emission inspection test if this recall work is not accomplished.

Should your dealer find that your evaporative emission system has been intentionally disabled, you will be asked if you wish the system to be restored so that it will function as designed. The cost of such restoration will be your responsibility. The enclosed owner reply card identifles your vehicle. Presentation of this card to your dealer will assist in making the necessary correction to your vehicle in the shortest possible time. If you have sold or traded your vehicle, please let us know by completing the postage paid owner reply card and returning it to us.

We are sorry to cause you this inconvenience, however, we have taken this action in the interest of your continued satisfaction with our products.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.