VOLTAGE REGULATOR FAILURE NO OR FULL CHARGE CONDITION

MODELS AFFECTED: 1986-87 LESABRE AND ELECTRA WAGONS 1986-87 REGALS

NOTICE: This bulletin adds generator part numbers and replaces Dealer Service Bulletin 87-6D-6, which should be discarded.

CONDITION

Under certain operating conditions, the voltage regulator may become inoperative, causing either a no-charge or full-charge condition. A no-charge can lead to a no-start condition, while a full-charge can lead to excessive battery charging, which can damage the battery.

CORRECTION

An improved voltage regulator, Part Number 1116423, has been released. Replace the original regulator with the new regulator which can be used on any of the affected models.

If the entire generator must be replaced, use the table below for correct part numbers.

Engine Rating Series Original P/N Service P/N ------ ------ ------ ------------ ----------- LV2 78 12SI 1105565 1101324 78 12SI 1105567 1101324 94 12SI 1105493 1101324

LD5 56 12SI 1100239 1101307 78 12SI 1100200 1101307 94 12SI 1105444 1101308 70 15SI 1105197 1101322 85 15SI 1105548 1101323

Warranty Information Use existing labor operations.

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.