AIR CONDITIONING V-DOT DIAGNOSIS CHARTS

Model and Year: 1990 LUMINA AND CELEBRITY AND U (APV) VAN

THIS BULLETIN CANCELS AND SUPERSEDES DEALER SERVICE BULLETIN NO. 90-238-1B, DATED MAY 1990. FIGURES 3 AND 7 HAVE BEEN REVISED IN THE DIAGNOSIS CHART. ALL COPIES OF 90-238-1B SHOULD BE DISCARDED.

The V-DOT (Variable Displacement Orifice Tube) diagnosis charts have been revised. The following charts should be used when diagnosing the V-DOT System for the following Service Manuals.

1990 Cavalier Section 1B Pages 1B-8 Thru 1B-15 1990 Lumina Section 1B Pages 1B-9 Thru 1B-11 1990 Corsica and Beretta Section 1B Pages 1B-9 Thru 1B-11 1990 Celebrity Section 1B2 Pages 1B2-8 Thru 1B2-14 1990 Chevrolet Lumina APV Section 1B Pages 1B-17 Thru 1B-24 1989 Cavalier Section 1B pages 1B-8 Thru 1B-15 1989 Corsica and Beretta Section 1B Pages 1B-7 Thru 1B-10

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.