ELECTRONIC CONTROL MODULE EXCHANGE PROGRAM
MODELS: 1980 CABALLERO WITH YF5 (CALF. EMISSIONS) 1981-1982 CABALLERO WITH NA5 EMISSIONS OR YF5 (CALF. EMISSIONS) 1982 S-TRUCK WITH YF5 (CALF. EMISSIONS)
A two-part ECM Return Tag has been included in the remanufactured ECM container. All areas of the tag are to be completed for all ECM's returned for repair. After completion of the tag, the extra copy is to be attached to the scrap copy of the repair order and retained for disposition by the GMC Zone Representative.
The following instructions indicate the information required in all areas of the ta on all ECM's returned for repair. The example indicates a properly completed tag.
1. Dealership name.
2. Dealership 5 digit code number assigned by GMC Truck 7 Coach. This should be the same code number taht is used on the warranty claim.
3. This should be the repair order number if repair is completed in the dealership or insert the letters OTC if the ECM was sold over the counter.
4. The complete vehicle serial number.
5. The original vehicle delivery date on warranty claims or out of warranty repairs can be listed UNKNOWN.
6. The vehicle mileage listed on the repair order or the current mileage if no repair order is written.
7. The date that the repair order was written or the date of the counter slip on over the counter sales.
8. The service part number listed on the ECM removed from the truck.
9. List all diagnostic codes that were obtained during the diagnostic circuit check.
10. Indicate the customer's complaint when the truck was brought in for service.
11. Indicate the malfunction found and the chart used to complete the repair.
Proper completion of the return tag will prevent any undue delay in the dealership receiving parts return credit. It will alos reduce the possibility of an unrepaired ECM being installed in a customer's truck.
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.
