SERVICE MANUAL UPDATE SEC.6E3 REVISED CODE 41 DIAG. CHART

SUBJECT: SERVICE MANUAL UPDATE - SECTION 6E3 - DRIVEABILITY AND EMISSIONS REVISED CODE 41 CHART

VEHICLES AFFECTED: 1990-91 'W' 3800 (VIN L) BUICK REGAL

* THIS BULLETIN HAS BEEN REVISED TO ADD 1990 MODEL YEAR.

This bulletin updates the ECM Code 41 Diagnostic Chart on Page 6E3-A-73 in "Driveability And Emissions" Section 6E3 for 1990 and 1991 Regals equipped with the 3800 (VIN L) engine.

The revised chart addresses the possibility of a faulty ignition module causing ECM Code 41 to be set by not supplying the CAM sensor signal to the ECM.

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.