SERVICE MANUAL UPDATE SEC. 1B MODE VALVE VACUUM ACTUATOR/AC

SUBJECT: SERVICE MANUAL UPDATE - SECTION 1B - MODE VALVE VACUUM ACTUATOR AND A/C MODULE ASSEMBLY (PROCEDURE REVISIONS)

MODELS AFFECTED: 1988-91 REGALS

SERVICE MANUAL UPDATE - SECTION 1B

The following procedures have been revised for the 1988-91 Regal Service Manual. Please use the following procedures for removing or installing the mode valve vacuum actuator or the A/C module assembly.

Mode Valve Vacuum Actuator

Remove or Disconnect

1. Windshield side upper garnish moldings. Refer to Roof Section in Service Manual. 2. Instrument panel pad cover. Refer to Instrument Panel, Clusters and Console (Section 8C). 3. Instrument panel sound insulators. Refer to Instrument Panel, Clusters and Console (Section 8C). 4. Steering column trim panel. Refer to Instrument Panel, Clusters and Console (Section 8C). 5. Parking brake release lever. Refer to Instrument Panel, Clusters and Console (Section 8C). 6. Lower steering column. Refer to Instrument Panel Clusters and Console (Section 8C). 7. Seven bolts holding instrument panel assembly, five at top and two at bottom. 8. Two bolts above steering column. 9. Pull back instrument panel assembly gently to access mode valve vacuum actuator. 10. Vacuum line from inoperative vacuum actuator. 11. Pinch "arrow heads" together and slip actuator shaft off valve lever. 12. Depress tang on actuator and slip off bracket on module.

Install or Connect

1. Bracket on module. 2. Actuator shaft on valve lever. Vacuum line to vacuum actuator. 4. Move instrument panel assembly back into place. 5. Two bolts above steering column.

Tighten * Two bolts to 1.5 N.m (18 lbs. in.).

6. Seven bolts holding instrument panel assembly, five at top and two at bottom.

Tighten * Bolts to 10 N.m (89 lbs. in.).

7. Lower steering column. Refer to Instrument Panel, Clusters and Console (Section 8C). 8. Parking brake release lever. Refer to Instrument Panel, Clusters and Console (Section BC). 9. Steering column trim panel. Refer to Instrument Panel, Clusters and Console (Section 8C). 10. Instrument panel sound insulators. Refer to Instrument Panel, Clusters and Console (Section 8C). 11. Instrument panel pad cover. Refer to Instrument Panel, Clusters and Console (Section 8C). 12. Windshield side upper garnish moldings. Refer to Roof Section in Service Manual.

A/C Module Assembly ------------------- Remove or Disconnect

1. Instrument panel assembly. Refer to Instrument Panel, Clusters and Console (Section 8C). 2. Rotate engine forward. Refer to 3.1L V-6 VIN Code T (Section 6A5). 3. Drain cooling system. Refer to Cooling and Radiator (Section 6B). 4. Discharge A/C System. Refer to "Discharging, Adding Oil, Evacuating and Charging Procedures" in this section. 5. A/C lines at evaporator. 6. Heater hoses at heater core. 7. Convenience center near A/C module. 8. Rear compartment outlet duct adapter screws. 9. Rear compartment outlet duct adapter. 10. A/C module bolt. 11. A/C module nuts. 12. Vacuum hose. 13. Electrical connectors. 14. A/C module.

Install or Connect

1. A/C module. 2. Electrical connectors. 3. Vacuum hose. 4. A/C module nuts.

Tighten * Nuts to 10 N.m (89 lbs. in.).

5. A/C module bolt.

Tighten * Bolt to 8 N.m (71 lbs. in.).

6. Rear compartment outlet duct adapter. 7. Rear compartment outlet duct adapter screws.

Tighten * Screws to 1.5 N.m (18 lbs. in.).

8. Convenience center near A/C module. 9. Heater hoses at heater core. 10. A/C lines at evaporator. 11. Evacuate, charge and leak test the A/C system. Refer to "Discharging, Adding Oil, Evacuating and Charging Procedures" in this section. 12. Fill coolant system and check for leaks. Refer to Cooling and Radiator (Section 6B). 13. Rotate engine rearward. Refer to 3.1L V-6 VIN Code T (Section 6A5). 14. Instrument panel assembly. Refer to Instrument Panel, Clusters and Console (Section 8C).

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.