For 1990-2009 cars

# DEFROSTER PERFORMANCE IMPROVEMENT- INST. FOAM STRIPS

APPLICATION: 1993 CADILLAC "D" CARS

#### CONDITION:

SOME CUSTOMERS MAY DESIRE IMPROVED DEFROSTER PERFORMANCE.

#### CORRECTION:

INSTALL ADDITIONAL SEAL TO HEATER CASE AT EDGE OF AIR DISTRIBUTOR DOOR TO DIRECT MORE AIR FLOW TO DEFROST, USING THE FOLLOWING PROCEDURE.

#### NOTE: THIS MODIFICATION MAY INCREASE DEFROST PERFORMANCE BY 10 TO 15 PERCENT, HOWEVER, HEAT TO FLOOR PERFORMANCE MAY BE REDUCED.

MATERIAL REQUIRED: SQUARE "CLOSED CELL" FOAM STRIPS, 13 MM X 13 MM (1/2" X 1/2"). THREE (3) STRIPS REQUIRED, 85 MM, 80 MM AND 25 MM (3", 3-1/2" AND 1" LONG). CLOSED CELL FOAM CAN BE OBTAINED LOCALLY AT FOAM OR UPHOLSTERY SUPPLY STORES. USE 3M* P/N 08011, GM P/N 12345096 ADHESIVE (OR EQUIVALENT).

1. MOVE BOTH SEATS TO THEIR FULL REAR POSITION. 2. REMOVE RIGHT AND LEFT FLOOR CARPET RETAINER ASSEMBLIES. (SEE SERVICE MANUAL, SECTION 10-6 FOR PROCEDURE.) 3. REMOVE RIGHT SIDE CLOSE-OUT PANEL UNDER DASH. 4. REMOVE RIGHT SIDE KICK PANEL. 5. PULL FRONT CARPET REARWARD TO EXPOSE REAR FLOOR AIR DUCTS, AND REMOVE AIR DUCTS FROM FLOOR AIR OUTLET. 6. REMOVE AIR OUTLET RETAINING SCREW AND AIR OUTLET OFF OF HEATER MODULE.

FIGURE 1 SHOWS THE AIR DISTRIBUTOR CASE VIEWED FROM THE CENTER OF THE VEHICLE LOOKING FORWARD. SEE ILLUSTRATION FOR FOAM POSITIONING AND FOR SURFACES WHERE ADHESIVE IS TO BE APPLIED.

7. INSTALL FOAM STRIPS TO THE PLASTIC CASE, IN AREAS BETWEEN RIBS, JUST REARWARD OF THE AIR DISTRIBUTOR DOOR.

#### NOTE: APPLY ADHESIVE TO BOTH THE VERTICAL AND HORIZONTAL FLANGE SURFACES TO ENSURE GOOD RETENTION.

8. REPLACE AIR OUTLET TO HEATER MODULE. 9. REPLACE REAR FLOOR DUCTS. 10. REPOSITION CARPET, REINSTALL KICK PANEL AND FLOOR CARPET RETAINER ASSEMBLIES. 11. REPLACE RIGHT SIDE CLOSE-OUT PANEL UNDER DASH.

*WE BELIEVE THIS SOURCE AND THEIR EQUIPMENT TO BE RELIABLE. THERE MAY BE ADDITIONAL MANUFACTURERS OF SUCH EQUIPMENT. GENERAL MOTORS DOES NOT ENDORSE, INDICATE ANY PREFERENCE FOR OR ASSUME ANY RESPONSIBILITY FOR THE PRODUCTS OR EQUIPMENT FROM THESE FIRMS OR FOR ANY SUCH ITEMS WHICH MAY BE AVAILABLE FROM OTHER SOURCES.

#### WARRANTY INFORMATION:

LABOR OPERATION: T-3363 LABOR TIME: 1.0 HR.

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.

COPYRIGHT 1993 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.