A/C AND HEATER BLOWER SWITCH INOPERATIVE

VEHICLES AFFECTED: 1986 STE'A' CAR

Some of the above vehicles may be reported as having a gradual loss of blower switch shaft travel until travel is not sufficient to change blower speed.

This is caused by the button on the end of the shaft having a rib omitted on the inside of the button. This allows the button to seat too far on the shaft and does not allow the shaft to travel far enough to rachet the switch.

This condition can be corrected by installing new button, P/N 16041103 on the switchi shaft. Following procedure should be followed:

1. Remove A/C-Heater control head from instrument panel.

2. Remove blower switch from control head.

3. Check blower switch buttons for rib as shown in Illustration.

4. Replace buttons without ribs.

5. Reinstall switch to control head and reinstall control head to instrument panel.

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.