POOR DEFROSTER OPERATION ON DRIVERS SIDE (SERVICE PROC.)
SUBJECT: POOR DEFROSTER OPERATION ON DRIVER'S SIDE OF WINDSHIELD (SERVICE PROCEDURE)
VEHICLES AFFECTED: 1991 "C" MODEL
CONDITION:
---------- Owners of some 1991 "C" car models may comment about the defrost pattern or weak blower operation on the driver's side of the windshield.
CORRECTION:
------------ 1. Remove Instrument Panel Upper Trim Pad 2. Remove Information Centre containing tell tale lights 3. Remove screw in boss, see figure. 4. Remove vanes two, four, and six from distributor assembly by wrapping vanes with duct tape and twisting out with 3 inch 90 degree needle nose pliers. (Snap-On 497ACP or equivalent)
NOTE: No small pieces can fall into the duct or a rattle may result. This is why the vanes must be wrapped with duct tape or equivalent prior to removal. The number four vane also incorporates a boss which must also be wrapped with duct tape and removed while removing the vane.
5. Reinstall the Information Centre and Instrument Panel Upper Trim Pad. 6. Clean inside of the windshield and top of the IP upper trim pad.
CORRECTION: (Cadillac) ------------------------- 1. Remove Instrument Panel upper Trim Pad. 2. Remove screw in boss, see figure. 3. Remove vanes two, four, and six from distributor assembly by wrapping vanes with duct tape and twisting out with 3 inch 90 degree needle nose pliers. (Snap-ON 497ACP or equivalent)
NOTE: No small pieces can fall into the duct or a rattle may result. This is why the vanes must be wrapped with duct tape or equivalent prior to removal. The number four vane also incorporates a boss which must also be wrapped with duct tape and removed while removing the vane.
4. Add a 5/16" thick strip of foam to rear flange of defroster duct to seal the gap between the Instrument Panel upper trim pad and the distributor assembly. 5. Reinstall the Instrument Panel upper trim pad. 6. Clean inside of the windshield and top of the IP upper trim pad.
CORRECTION: (OLDS) ------------------ 1. Remove Instrument Panel Upper Trim Pad. 2. Wrap vanes two, four, and six and boss with duct tape, see figure.
Note: No small pieces can fall into the duct or a rattle may result. This is why the vanes must be wrapped with duct tape or equivalent prior to removal. The number four vane also incorporates a boss which must also be wrapped with duct tape and removed while removing the vane.
3. Cut screw, fourth vane, and boss out of distributor assembly. 4. Remove vanes two and six from distributor assembly by twisting out with 90 degree needle nose pliers. 5. Reinstall Instrument Panel Upper Trim Pad. 6. Clean inside of the windshield and top of the I.P. upper trim pad.
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.
