For 1990-2009 cars

# SERVICE MANUAL UPDATE SEC. 8A ON-BOARD DIAG. PROCEDURES

PAGE 8A-81-17, INSTRUMENT PANEL; GAGES CLUSTER, UB7 AND PAGE 8A-82-16, INSTRUMENT PANEL; DIGITAL CLUSTER, U2A - DIC ON-BOARD DIAGNOSTICS HAS BEEN REVISED WITH THE FOLLOWING PROCEDURE:

DIC ON-BOARD DIAGNOSTICS

O THE FOLLOWING PROCEDURE MUST BE PERFORMED BEFORE THE DRIVER INFORMATION ON-BOARD DIAGNOSTICS CAN BE USED. TO ENTER THE DIAGNOSTIC MODE, DO THE FOLLOWING:

1. WITH THE IGNITION SWITCH IN RUN, PRESS THE DEST KEY 2. PRESS RESET 3. PRESS 8192 (ETA, ECON, E/T, FUEL) 4. PRESS ENTER.

THE DIC WILL NOW BE IN THE DIAGNOSTIC MODE.

O DISPLAY POSITION FF WAS NOT INCLUDED IN THE DRIVER INFORMATION REFERENCE DIAGRAM, PLEASE ADD THE FOLLOWING:

POSITION FF - OIL PRESSURE, 0 TO 99% OF MAXIMUM PRESSURE

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.

COPYRIGHT 1991 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.