INTERMITTENT/HARD DRIVE SYMP. (WRAP CONDUIT W/ELEC. TAPE)

SUBJECT: INTERMITTENT OR HARD DRIVEABILITY SYMPTOMS (WRAP CONDUIT WITH ELECTRICAL TAPE)

VEHICLES AFFECTED: 1991-93 "C" MODELS

A small number of 1991-93 DeVilles and Fleetwoods (FWD) may experience one or more of the following derivability symptoms intermittently and/or during engine movement as follows:

o Engine stall

o Loss of power or hesitation

o Engine surge/miss at cruising or idle speeds

o Long crank and/or no start

o Erratic or no shift condition

o Black smoke/rotten egg odor from tail pipe

o ECM Code(s) 12, 14, 22, 23, 32, 41, 53, 71 or 73

o RH relay center fuse(s) 5, 6, 7, or 8 blown

o COOLANT TEMP, STOP ENGINE TEMP, OIL, or TRACTION OFF warning indicators ON.

o ECC system not cooling or A/C clutch inoperative.

These conditions may be due to a short to ground of one or more circuits contained in the engine wire harness where it is retained to the right valve cover by two metal clips. Refer to Figure 1. The clip locating tab may be protruding into the conduit and chaffing wires causing circuit to short. To repair this condition use the following procedure:

1. To verify, loosen and remove engine harness from each clip.

2. Inspect wire harness at clip locations for damaged circuits. Refer to Section 8A of the appropriate Service Information Manual for wiring repairs.

3. Bend locating tab to the inside surface of each clip. Refer to Figure 2.

4. Wrap the engine harness conduit with electrical tape where it is retained, carefully position harness, and secure.

For vehicles repaired under warranty use:

Labour Operation: N6270

Labour Time: .2 Hours

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.