Brake Switch Wiring Polarity

Important: This campaign bulletin, minus your assigned VIN listing, is being forwarded to you at this time in order to take care of those customers who bring their vehicle in for inoperative brake lamps prior to their notification of this campaign.

The Highway 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 customer 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 customer 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 remedies, every effort must be made to promptly schedule an appointment with each customer and to repair their vehicle as soon as possible. As you will see in reading the attached copy of the divisional letter that is being sent to customers, the customers are being instructed to contact the appropriate 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.

General Motors has decided that a defect which relates to motor vehicle safety exists in all 1994 Chevrolet and GMC C/K model vehicles. These vehicles were built with the polarity of the wiring for the zero adjust brake switch reversed from what was specified on the switch drawing. With the reversed polarity, the contacts in the brake switch can wear out prematurely. The brake switch will perform normally until the brake switch contacts wear out. When worn out, the contacts fail to close when the brake pedal is pressed. This results in the loss of the brake lamps without any warning to the driver, which could fail to warn a following driver that the vehicle is braking and could lead to a vehicle accident.

To prevent the possibility of this condition occurring, dealers are to replace the brake switch and reverse the wiring.

Involved are all 1994 Chevrolet and GMC C/K model vehicles built within the following VIN breakpoints:

Important: Dealers should confirm vehicle eligibility through VISS (Vehicle Information Service System) prior to beginning campaign repairs.

Computer listings containing the complete Vehicle Identification Number, customer name and address data will be supplied in late April, 1999 when owner notification begins.

Parts required to complete this campaign are to be obtained from General Motors Service Parts Operations (GMSPO). Please refer to your "involved vehicles listing" prior to ordering parts. Normal orders should be placed on a DRO = Daily Replenishment Order. An emergency requirement should be ordered on a CSO = Customer Special Order.

Customers will be notified, in phases, of this campaign on their vehicles by General Motors. The anticipated date that GM will begin contacting customers is late April, 1999.

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

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.

1. Remove the negative battery cable.
2. Remove the retainer (1) from the brake pedal pin (4) and unsnap the stoplamp switch (2) from the pushrod (3).
3. Remove the wiring connector from the switch (2) and discard the switch.
4. With the switch removed, unsnap the side/locking cover on the wiring connector and remove the wires in cavities A and B. Re-index the wires as follows:

•	UTILITIES AND SUBURBANS

•	White wire in cavity A, and the orange wire in cavity B.

•	ALL OTHER MODELS

•	Yellow wire in cavity A, and the orange wire in cavity B.

5. Repair the locking tab on the terminals and insert wires into the new cavities and snap closed the side/locking cover on the connector.
6. Reinstall the wiring connector to the new stoplamp switch (2) and snap the switch to the pushrod (3).
7. Locate the switch (2) on the brake pedal pin (4) and install the retainer (1).
8. Connect the negative battery cable.
9. Install the GM 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 by the customer for periodic servicing. When installing the Campaign Identification Label, be sure to pull the tab to allow adhesion of the clear protective covering. Additional Campaign Identification Labels can be obtained from Dealer Support Materials by calling 1-888-414-6322 (Monday-Friday, 8:00 a.m. to 5:00 p.m. EST). Ask for Item Number S-1015 when ordering.

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

Submit a Product Campaign Claim with the information indicated below. Refer to the General Motors Corporation Claims Processing Manual for details on Product Campaign Claim Submission.

When a customer requests reimbursement, they must provide the following:

Claims for customer reimbursement on previously paid repairs are to be submitted as required by WINS.

Important: Refer to the GM Service Policies and Procedures Manual, section 1.6.2, for specific procedures regarding customer reimbursement verification.