A 1986 C/K truck or a 1987 R/V truck with a 117mm manual transmission may have a shift lever rattle or buzz condition in 1st and 2nd gear.
The rattle/buzz can be repaired by using a 1985 or prior model year shift lever assembly.
6274077 Shift Lever Assembly -- chrome (1985 and prior model year design)
Only chrome plated shift lever assemblies are available for service. These are completely interchangeable with the original equipment black painted shift levers.
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.