ECM HARNESS: CHAFED OR CUT REPAIR PROCEDURE

1985 6000 WITH V6 2.8L LE2 (VIN CODE X) ENGINE AND C60 A/C

Some of the above vehicles may exhibit the subject condition, which is caused by the routing of the ECM harness and/or the location of the hole in the R.H. shock tower for the harness clip rose-bud attachment being too low.

To repair this condition, the following procedure should be followed:

1. Disconnect the negative battery cable.

2. Open the harness clip at the R.H. shock tower.

3. Check the location of the rose-bud hole in the shock tower. The hole should be approximately (130mm or 5 1/8 inches) from the top of shock tower and vertically in-line with the top inboard stud of shock tower. If the hole is not in this approximate location, drill new hole (6.3mm or .25 dia.) at this location and relocate the rose-bud clip. Seal old hole using black thumb grade sealer.

4. Inspect harness wiring for chafed or cut wires. If the wires are damaged, repair as necessary.

5. Drain cooling system enough to disconnect the inlet heater hose at the R.H. rear corner of the engine.

6. Disconnect the heater hose and route hose around the ECM wiring harness (capturing the harness in the loop of the hose.

7. Reconnect the heater hose.

8. Clip the harness above the heater hose into the rose-bud harness clip.

9. Refill cooling system and connect the battery cable.

When the repair is finished, the ECM harness should be back behind and away from the pulley guard. The new routing should look like the following illustration.

Labor Operation Number: T1136

Labor Time: .4 hours to reroute ECM harness

Add: (If Necessary)

.5 hours to repair wiring harness

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.