REDUCED HEATER SYS. PERFORM. NEW HEATER OUTLET DUCT/PROCED.

MODELS AFFECTED: 1988-1989 REGALS

Comments about heater system performance, such as being slow to warm up or inadequate heat, may be received from some owners of 1988-1989 Regals.

If the heater system is operating properly and the engine temperature is in the operating range, the cause of the condition may be reduced air/heat distribution from the heater outlet.

This condition may now be addressed by using the following service parts and procedures.

PARTS

QUANTITY PART NUMBER PART NAME -------- ------------ ---------- 1 52452131 Heater Outlet Duct 26 in. *06375 3M #4508 Scotchfoam Black Vinyl Foam Tape

*Purchase Locally.

Parts are currently available from GMSPO.

PROCEDURE

Remove the R.H. hush panel, see Fig. 3.

Remove the ash tray retainer, Fig. 4, and disconnect the wiring harness from the retainer.

Remove the adapter duct, see Fig. 1.

Remove the heater outlet duct, see Fig. 1.

Remove the two top screws from the module, one on each side. These two screws will be used to mount the new heater outlet duct, see Fig. 2.

Install the 1/8 X 3/4 in. foam tape to the grooved mounting surface of the new heater outlet duct, approximately 11 3/4 in of tape across the top of the outlet duct and 7 in.of tape on each side. Trim off excess tape.

Install the new heater outlet duct to the module, see Fig.2.

Install the adapter duct, see Fig.1.

Using a bench grinder, make a 2 in. long by 3/8 in. deep cutout in the front edge of the ash tray retainer, as shown in Fig. 4.

Install the wiring to the retainer and install the ash tray retainer. Cut off a two in. square piece of the R.H. hush panel as indicated in Fig. 3.

Install the R.H. hush panel.

Make sure the ash retainer does not interfere with the new heater outlet duct.

WARRANTY INFORMATION

Labor Operation: T1510 Labor Time: 0.6 Trouble Code: 92

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.