Defect Involved

General Motors has determined that a defect which relates to motor vehicle safety exists in some 1985 S/T15 and P25-35 model light duty trucks and 1986 C/K, G Van, Medium Duty and Heavy Duty model trucks. The push-pull headlight switch might have been manufactured with electrical contacts which could potentially result in an intermittent headlight circuit. An intermittent circuit could cause the headlights to suddenly go out. Sudden loss of the headlights under severe weather or nighttime driving conditions could reduce driver visibility which might result in a vehicle crash without prior warning.
To prevent this condition dealers are required to inspect, and if necessary, replace push-pull headlight switches on suspect vehicles.

VEHICLES INVOLVED

Involved are certain 1985 S/T15 and P25-35 model light duty trucks and 1986 C/K15-25-35, G15- 25-35, C5-6-7, B6, P6, D9 and J8-9 model trucks equipped with push-pull type headlight switches built within the following VIN breakpoints:

Model
Year Model Plant From Through

1985 S/T15 Pontiac F0532010 F0532742
Moraine F2540848 F2542403
Shreveport F8543378 F8544409

P25-35 Detroit F3510322 F3510389

1986 C/K15-25-35 Flint Line #1 GF705361 GF705859
Flint Line #2 GF504763 GF505140
St. Louis GS504398 GS504945
Oshawa G1505088 G1505686
Janesville GJ504719 GJ505438
In addition:
1GTEK14C5GJ505451 1GTGC24M4GJ505462 1GTGK24MOGJ505476
G-Van Scarborough G4503996 G4504602
Lordstown G7500418 G7500675

C5-6-7 Pontiac GV500745 GV508121
B6 Pontiac GV505686 GV508119
P6 Pontiac GV507800 GV508046
D9 Pontiac GV504851 GV505538
JB-9 Pontiac GV504835 GV505527

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 ownership, 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 the future, you should take the steps necessary to be sure 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 modification according to instructions contained in this bulletin. If no owner's name and address were available to GMC Truck at the time of campaign initiation, the dealer will determine the owner's name and address from the dealership sales records. Please provide this information directly on the second copy of the listing next to the applicable VIN, so that 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 General Motors Corporation 101 Union Street Plymouth, Michigan 48170

OWNER NOTIFICATION

Owners wiU be notified of this campaign on their vehicles by GMC Truck (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 vehide registration data for any other purpose is a violation of law in several states. According, you are urged to limit the use of this listing to this campaign.