[Manitcor]

Subject: Various Driveability Symptoms -- Malfunction Indicator Lamp (MIL) Illuminates Intermittently, DTCs Set, Engine Will Not Start (Repair Wire(s))


Models: 1997-2001 Buick Century, Regal
2000-2002 Chevrolet Impala, Monte Carlo
1999-2001 Pontiac Grand Prix Built Prior To 10/1/00 -- VIN Breakpoint 1F136536


Condition:
Some customers may comment on one or more of the following conditions:
Intermittent MIL/Service Engine Soon indicator illuminated
Anti-Lock Brake System Warning Light illuminated
Engine will not start
Engine stalls after start up
Various electrical system failures
Various driveability concerns


Cause:
These conditions may be caused from the engine wiring harness chaffing against the mounting ring on the A/C accumulator. This contact may cause a rub through to the wires enclosed in that harness, resulting in the above conditions. Damage to the harness may also result in several stored diagnostic trouble codes.


Correction:
Inspect and repair any damaged wires. Use the procedure listed below.


Notice:
Do not install plastic conduit over the repaired area. Doing so may damage the A/C accumulator.


Figure 1


Inspect and repair any damaged wires at the suspected area (1). Refer to Wiring Repairs in the Wiring Systems sub-section of the Service Manual. Wrap the repaired area with 3M® Electrical Moisture Sealant Patches, P/N 06149, or equivalent. Wrap the entire area of contact with friction material , GM P/N 22617849, to protect it from future damage.
Verify proper installation of the harness clamp that attaches the harness to the transmission. Reinstall if necessary.
Reposition the repaired harness away from the A/C accumulator. Pull the harness through the clamp at the transmission to remove any slack.


Parts Information:
Part Number Description Qty
22617849 Protector, Rocker Panel Molding 1


Parts are currently available from GMSPO.


GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these 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 your GM dealer for information on whether your vehicle may benefit from the information.


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