NEW TWILIGHT SENTINEL AND DAYTIME RUNNING LAMP MODULES

Models 1990 BONNEVILLE MODELS Affected:

This bulletin cancels and replaces bulletin 90-9-9 issued 6190. This bulletin has been revised to correct the labor time.

The 1990 Bonneville Model breakpoint number is L1257540 for the Wentzville plant.

CONDITION: A new Twilight Sentinel module has been developed to correct the following conditions on the subject vehicles:

1. Headlamps coming on and timing out when turning on the park lamp switch with the key in the "off" position. This may occur with the Twilight Sentinel system on or off.

2. Headlamps will not flash at night when the Theft Deterrent system is activated.

3. Headlamps turn on and off (repeated cycles) at dawn or dusk.

CORRECTION: U.S. ONLY - To correct these conditions, replace the Twilight Sentinel module using part number 16515789.

Parts are currently available from GMSPO.

This change will be reflected in the next Labor Time Guide update.

WARRANTY INFORMATION

Use Labor Operation No.: R4220 Labor Time : .5 hr. Trouble Code : 92

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.