For 1990-2009 cars

# UNDERBODY DIMENSIONS REVISED IN SERVICE MANUAL

SECTION 3, UNDERBODY, OF THE BODY SERVICE MANUAL IS BEING REVISED TO ADD THE FOLLOWING VERTICAL AND HORIZONTAL DIMENSIONS. THE APPRORIATE UPDATED FIGURES FROM SECTION 3 ARE PROVIDED FOR REFERENCE. HORIZONTAL VERTICAL C TO B R J TO D S TO P SEE PUBLICATION REFERENCED FOR ILLUSTRATION AND SPECIFICATIONS.

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.