DIESEL ENGINE GLOW PLUG/'D' 24-VOLT SYSTEM/MILITARY TRUCK

VEHICLES AFFECTED: 1984 Models Equipped with 6.2L Diesel Engine

The recent sales of the 6.2L diesel engine equipped vehicles to the military may cause dealers to come into contact with these trucks for service work.

It should be noted that the glow plugs from the "D" (military) truck are A/C 13G glow plugs. They will fit into any 6.2L head but have a thinner electrical connection than the normal 6.2L glow plug, A/C 9G. Therefore, they could be installed in a non-military 6.2L diesel, but they would not heat up correctly and a hard start condition would occur. The wider electrical tab on the A/C 9G will not allow them to be hooked up in a military unit.

NOTICE: The military unit ('D' truck) has a 24 volt electrical system; therefore, it requires the different glow plug.

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.