HEAVY CHUGGLE (35-55 MPH) MISCALIBRATED PROM, EGR

1982 4.1L EQUIPPED GRAND PRIX AND BONNEVILLE

A recalibrated PROM, EGR valve, EGR relay, and a wiring harness to install the relay are now available in limited quantity to correct this condition.

The following kit part #25522748 should be ordered from WDDGM and installed on the vehicle per the instructions contained in this bulletin.

NOTICE: All parts contained in this kit must be installed for correction, if not performance and detonation conditions will occur.

Procedure

1. Disconnect positive battery cable.

2. Remove ECM and housing from body kick panel.

3. Connect jumper harness provided to relay.

4. Solder splice jumper harness into the following wire leads going to the lettered ECM connector of the ECM harness; See Figures 2 and 3.

Note: Use only Rosin core solder for all solder splices.

ECM HARNESS CONNECTOR RELAY JUMPER HARNESS ---------------------- -------------------- Cavity Circuit Wire Color Wire Color ------ ------- ---------- ---------- P 422 Tan/Blk Str Tan/Blk Str T 435 Gray Gray C 439 Pink/Blk Str Pink/Blk Str A 450 Black Black

5. Tape each wire splice.

6. Wrap relay in foam sound deadener provided, See Figure 4.

7. Tape jumper harness and relay to ECM harness, See Figure 1 for locations.

8. Install new PROM into ECM, reinstall ECM and housing.

9. Install EGR valve per Service Manual procedures.

10. Reconnect battery cable.

For payment of warranty claims the following operation number time allowance and failure code should be used.

Operation Number: T5067

Labor Time Allowance: 0.7

Failure Code: 92

NOTICE: Individual parts and part numbers contained in the kit are being provided in the event an individual part is needed for future repairs.

Wiring Harness Jumper - 12043500 Relay - 25522747 Foam - 25522723 EGR - 17079799 PROM - 1226913

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.