CAMPAIGN: AUTOMATIC TRANS FLUID LEAK

Subject: PRODUCT SAFETY CAMPAIGN 93C07 - AUTOMATIC TRANSMISSION FLUID CONTAINMENT

Model and Year: 1988-93 C/K TRUCKS (ALL MODELS) WITH 5.OL, 5.7L & 7.4L ENGINES AND 4L60, 4L60-E & 3L80 AUTOMATIC TRANSMISSIONS

The National Traffic and Motor Vehicle Safety Act, as amended, provides that each vehicle which is subject to a recall campaign of this type must be adequately repaired within a reasonable time after the owner has tendered it for repair. A failure to repair within sixty (60) days after tender of a vehicle is prima facie evidence of failure to repair within a reasonable time.

If the condition is not adequately repaired within a reasonable time, the owner may be entitled to an identical or reasonably equivalent vehicle at no charge or to a refund of the purchase price less a reasonable allowance for depreciation.

To avoid having to provide these burdensome solutions, every effort must be made to promptly schedule an appointment with each owner and to repair their vehicle as soon as possible. As you will see in reading the attached copy of the letter that is being sent to owners, the owners are being instructed to contact the Chevrolet Customer Assistance Center if their dealer does not remedy the condition within five (5) days of the mutually agreed upon service date. If the condition is not remedied within a reasonable time, they are instructed on how to contact the National Highway Traffic Safety Administration.

DEFECT INVOLVED

General Motors has determined that a defect which relates to motor vehicle safety exists in certain 1988-93 C/K model trucks equipped with certain combinations of 5.OL, 5.7L & 7.4L engines and 4L60, 4L60-E & 3L80 automatic transmissions.

The transmission fluid in these vehicles, as a result of unanticipated heat generation in the transmission, may be forced out of the vent tube. The heat generation is usually the result of trailering heavy loads at high speeds or high-load/off-road use. The vented transmission fluid may come in contact with the catalytic converter and ignition of the transmission fluid may result.

To prevent the possibility of this condition occurring, dealers are to install a longer transmission vent hose routed to the left side of the vehicle.

VEHICLES INVOLVED

Involved are certain 1988-93 C/K model trucks equipped with 5.OL, 5.7L & 7.4L engines and 4L60, 4L60-E & 3L80 automatic transmissions built within the following VIN breakpoints:

1988-93 C/K 10, 20 model trucks equipped with 5.7L (L05) engines and 4L60/4L60-E (MD8/M30) automatic transmission

1988-93 C/K 20 model trucks equipped with 5.OL (L03) engines and 4L60/4L60-E (MD8/M30) automatic transmission

1988-90 C/K 20, 30 equipped with 5.7L (L05) or 7.4L (L19) engines and 3L80 (M40) automatic transmission

PLANT YEAR MODEL PLANT CODE FROM THROUGH ---- ----- ----- ----- ---- ------- 1988 C/K Pontiac E JE100001 JE211187 Ft. Wayne Z JZ000039 JZ331450 Oshawa #2 1 J1100019 J1309126

1989 C/K Pontiac E KE100001 KE282856 Ft. Wayne Z KZ100001 KZ285940 Oshawa #2 1 K1100016 K1262167

1990 C/K Pontiac E LE100003 LE265302 Ft. Wayne Z LZ100004 LZ276058 Oshawa #2 1 L1100015 L1265823

1991 C/K Pontiac E ME100016 ME219863 Ft. Wayne Z MZ100001 MZ226947 Oshawa #2 1 M1100019 M1246582

1992 C/K Pontiac E NE100001 NE235101 Janesville J NJ100002 NJ360921 Ft. Wayne Z NZ100002 NZ239480 Oshawa #2 1 N1100002 N1270832

1993 C/K Pontiac E PE100009 PE102046 Ft. Wayne Z PZ100002 PZ101130 Oshawa #2 1 P1100001 P1106822

Involved vehicles have been identified by Vehicle Identification Number Computer Listings. Computer listings contain the complete Vehicle Identification Number, owner name and address data, and are furnished to involved dealers with the campaign bulletin. Owner name and address data furnished will enable dealers to follow-up with owners involved in this campaign.

These listings 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 the follow-up necessary to complete this campaign. Any dealer not receiving a computer listing with the campaign bulletin has no involved vehicles currently assigned.

OWNER NOTIFICATION

Owners will be notified of this campaign on their vehicles by Chevrolet Motor Division (see copy of owner letter included with this bulletin). OWNER MAILING WILL BE PHASED OVER THE NEXT FEW (4) WEEKS DUE TO THE SIZE OF THE VEHICLE POPULATION.

DEALER CAMPAIGN RESPONSIBILITY

All unsold new vehicles in dealers' possession and subject to this campaign must be held and inspected/repaired per the service procedure of this campaign bulletin before owners take possession of these vehicles.

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

Owners of vehicles recently sold from your new vehicle inventory with no owner information indicated on the dealer listing, are to be contacted by the dealer, and arrangements made to make the required correction according to the instructions contained in this bulletin. This could be done by mailing to such owners a copy of the owners letter accompanying this bulletin. Campaign follow-up cards should not be used for this purpose, since the owner may not as yet have received the notification letter.

In summary, whenever a vehicle subject to this campaign enters your vehicle inventory, or is in your dealership for service in the future, please take the steps necessary to be sure the campaign correction has been made before selling or releasing the vehicle.

PARTS INFORMATION

NOTICE

EACH DEALER WILL BE PRESHIPPED ONE (1) CARTON (50 PIECES) OF TRANSMISSION VENT HOSES AND ONE (1) CARTON (50 PIECES) OF TIE STRAPS ON OR ABOUT MARCH 12, 1993.

Parts required to complete this campaign are to be obtained from General Motors Service Parts Operations (GMSPO) . To ensure 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 on an advise code (2).

Quantity/ Part Number Description Vehicle ----------- ----------- --------- 15960319 Transmission Vent Hose 1 Hose

(IMPORTANT NOTICE: SHIPPED IN MERCHANDIZING PACKAGE OF 50 PIECES)

11501906 Tie Strap 1 Tie Strap

(IMPORTANT NOTICE: SHIPPED IN MERCHANDIZING PACKAGE OF 50 PIECES)

SERVICE PROCEDURE

1. Inspect vehicle for lock-seal dipstick (Figure 1, page 5) as installed in campaign 90C35, dated January, 1992. If this lock-seal dipstick is not present, it should be obtained through GMSPO and campaign 90C35 completed.

2. Raise vehicle on hoist.

3. Inspect existing transmission vent tube (Figure 2, page 5) to be certain it is not plugged with dirt or debris. Clean if necessary.

Notice: It is important that this vent tube is open. If this tube is plugged, premature transmission seal failure may result.

4. Lube inner diameter of vent hose with a small amount of clean transmission fluid and install it over existing vent tube until secure.

Notice: This vent hose is constructed of fuel line rated material. Use of any other type hose is discouraged as it may deteriorate in this application.

5. Locate vent hose as shown in Figure 2 (page 5) and secure it to transmission wiring harness with tie strap.

6. Install Campaign Identification label.

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 the five (5) digit dealer code of the dealer performing the campaign service. This information may be inserted with a typewriter or a 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. Additional "Campaign Identification Labels" can be obtained from DAC.

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

CLAIM INFORMATION

Submit a Product Campaign Claim with the information indicated below: * FAILED PARTS CC-FC LABOR LAB OTH REPAIR PERFORMED PC PART NO. ALLOW OP HRS HRS ---------------- -- -------- ------ ------ ----- --- --- Install New Trans. 2 15960319 ** SK-00 V7930 0.2 0.1 Vent Hose

* Campaign Administrative Allowance.

** The "Parts Allowance" should be the sum total of the current GMSPO Dealer Net price plus 30% of all parts required for the repair.

Dealers will automatically receive the correct labor and material allowance based on the labor operation performed.

Refer to the Chevrolet Claims Processing Manual for details on Product Campaign Claim Submission.

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.