GM Service Manual Online
For 1990-2009 cars only

INTAKE MANIFOLD CONTACT DASH INSTALL NEW PLENUMEXTENSION

MODEL AND YEAR: 1985 CORVETTE

If the intake manifold plenum extension contacts the front of dash during engine motion, install new plenum extension, P/N 14082427.

This is the same extension used on the 1986 Corvette.

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.