For 1990-2009 cars

# CODES 24,55 AND 41 UPDATE REVISED CODE CHARTS

THE DIAGNOSTIC CHARTS FOR 1981 AND 1982 VEHICLES WITH CCC HAVE BEEN REVISED. PLEASE REFER TO THE DIVISION HARDCOPY OF THIS BULLETIN NUMBER FOR THE REVISED DIAGNOSTIC CHARTS.

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.