Control Assembly Replacement; Temperature Door Cable Adjustment; Blower Switch Replacement; Vacuum Tank Replacement - GMC G Service Manual

IB-42 AIR CONDITIONING
Figure 44 — Plenum Air Iniet Door
CONTROL ASSEMBLY
REPLACEMENT
H Remove or Disconnect (Figure 45)
1. Battery ground cable.
2. Radio. Refer to ACCESSORIES (SEC. 9).
3. Instrument panel bezel.
4. Control from the dash.
• Lower the control to gain access to the back
control assembly.
I ? | Important
• Do not kink the cable.
5. Cable (236).
. Vacuum harness hose.
6
7. Electrical harness connector.
. Control.
8
9. Switch
H Install or Connect (Figure 45)
1. Fan switch to the new control.
2. Electrical harness.
3. Vacuum harness.
4. Cable (236).
5. Control to the dash.
. Instrument panel bezel.
6
7. Radio. Refer to ACCESSORIES (SEC. 9).
. Battery ground cable.
8
Figure 45 — Control Assembly Replacement
TEMPERATURE DOOR CABLE
ADJUSTMENT
\ ^ \ Adjust (Figure 46)
1. Remove instrument panel compartment and door.
2. Loosen the cable attaching bolt (241) at the heater
case assembly.
• Make sure the cable is installed in the bracket
on the defroster duct assembly.
3. Place the temperature lever in full COLD position and
hold while tightening the cable attaching screw.
4. Install instrument panel compartment and door.

BLOWER SWITCH REPLACEMENT

The blower switch is located on the rear of the control
assembly.
B Remove or Disconnect (Figure 45)
. Control assembly. Refer to "Control Assembly
1
Replacement" in this Section.
. Switch-to-control screws.
2
3. Switch (235).
Install or Connect (Figure 45)
. Switch (235).
1
. Switch-to-control screws.
2
3. Control assembly. Refer to "Control Assembly
Replacement" in this Section.

VACUUM TANK REPLACEMENT

The vacuum tank is mounted to the cowl behind the left
front fender.