Engine Controls - Driveability Diagnostics Guide
90buick14 Bulletin 90-6E-14Date July '90
Ref. No. 90-163-6E
Corp. Ref. No. 036509
SUBJECT: PASSENGER CAR ENGINE DRIVEABILITY DIAGNOSTICS GUIDES
MODELS AFFECTED: 1988 - 89 REGALS WITH 2.8L (VIN CODE W) ENGINE 1989 - 90 REGALS WITH 3.1L (VIN CODE T) ENGINE 1987 - 89 CENTURY WITH 2.8L (VIN CODE W) ENGINE
The attached handy Pocket Guide(s) are being sent to GM dealerships to assist them with quick diagnostics and repair of passenger car driveability conditions.
This was deemed desirable due to the volume of service bulletins and information published on driveability and due to the changes in engine design and diagnostics over the past few years.
The Pocket Guide(s) attached to this bulletin should be provided to the driveability technicians at your dealership. They summarize all information into a "condition, cause, and correction" format specific to resolution and the "do's and don'ts" for each model year engine.
All Service Bulletin numbers are current and correct as of April 20, 1990 but are subject to change. This Pocket Guide may not be updated to include future bulletins.
For further information regarding the pocket guide, contact your local zone or branch office.