SERVICE MANUAL UPDATE SEC.8A REVISED ELECT. BLOWER DIAG.

SUBJECT: SERVICE MANUAL UPDATE - SECTION 8A - ELECTRICAL DIAGNOSIS REVISED BLOWER MOTOR DIAGNOSIS

VEHICLES AFFECTED: 1990-91 U VANS

This bulletin updates CHART #1, BLOWER MOTOR INOPERATIVE OR WILL NOT OPERATE AT LOW SPEED, found in ELECTRICAL DIAGNOSIS (SECTION 8A) of the 1990 and 1991 U-Van Service Manuals. Please replace CHART #1 in Sections 8A-60 and 8A-63 with the attached revision.

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.