For 1990-2009 cars

# REVISION TO KENT-MOORE TOOL NO. J-23498-20

Due to revisions in production tolerances, the inclinometer adaptor (KM Tool No. J-23498-20) may not fit onto some front cardan joints because of interference with the transmission crossmember. To revise the adaptor to make it fit on cars with 1:1 propshafts, follow the procedure below:

1. Cut off the thumb screw with a hacksaw (see figure). Discard thumbscrew.

2. Using an allen wrench (see figure), loosen the screw from the inside of the tool until the two pieces of the tool separate.

3. Insert a washer approximately 4 1/2mm (3/16 inch) thick between the two pieces of the tool and hold in place by reinstalling the screw (see figure).

4. Grind off the end of the screw until it is flush with the tool.

The tool should now be pushed onto the cardan joint to make an angle measurement. Be certain that the locating boss is flush on the cap before making any angle readings.

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.