SERVICE MANUAL UPDATE SEC. 6E-DRIVEABILITY & EMISS.

VEHICLES AFFECTED: 1987-90 A,J, L AND W CARS W/2.0L, 2.2L, 2.8L OR 3.1L ENGIN VIN 1,G, W OR T)

YEAR VIN ENGINE CARLINES SECTION TEXT ---- ---- ------ -------- ------- ---- 1987-89 1 2.0L J, L CHART A-3 Page 2 of 3

1990 G 2.2L J, L Chart A-3 Page 2 of 3

1987-90 W/T 2.8L/3.1L A, J, L Chart A-3 Page 3 of 3

1988-90 W/T 2.8L/3.1L W Chart A-3 Page 3 of 3

The following crank sensor voltage output specifications have been updated for applications listed above. This updated information should be noted in the appropriate "Engine Cranks But Will Not Run" Chart A-3, in the "Driveability and Emissions" section "6E" of the Service Manual.

- Normal crank sensor voltage output range (room temperature/charged battery) .8 volt (800 mv) - 1.4 volts (1400 mv).

- Minimum crank sensor voltage output (slow cranking/low battery) .3 volt (300 mv).

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.