WHEN TROUBLE SHOOTING THE NEW CUSTOM CRUISE III ELECTRONIC CRUISE CONTROL SYSTEM FOLLOW THE SYSTEM DIAGNOSIS INSTRUCTIONS AS PUBLISHED IN THE CHEVROLET, GMC LIGHT DUTY SERVICE MANUAL. IF VOLTAGE AND RESISTANCE CHECKS ARE MADE, A DIGITAL MULTIMETER SHOULD BE USED. DO NOT USE A TEST LIGHT. THE HIGH CURRENT DRAW OF THE LIGHT MAY DAMAGE THE INTERNAL ELECTRONIC COMPONENTS.
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.