Drain Tube Replacement - Hummer H1 Service Manual

11-24 Heating/Ventilation/Air Conditioning (HVAC)
MAIN A/C - HEAT UNIT COWL INSULATION
REPLACEMENT
Removal
1. Remove air intake weathercap (Section 3).
2. Remove air cleaner assembly shield.
3. Remove vent line from air cleaner assembly.
4. Remove air cleaner assembly and air induction tube.
5. Loosen and remove two clamps and move surge tank out
of the way.
6. Remove drain tube.
7. Remove trim screws, as necessary, from insulation on air
intake housing (Figure 11-20).
8. Remove screws and washers, as necessary, from insulation
on upper cowl.
9. Remove bolts, nuts, and fasteners, as necessary, from
insulation on front of cowl.
10. Remove three nuts and washers from insulation on main
A/C - heat unit mounting studs.
11. Remove cowl insulation.
SEAL RETAINER
OVER INSULATION
TRIM SCREWS
Figure 11-20: Cowl Insulation Mounting
BLOWER MOTOR
RESISTOR
UPPER
COWL
AIR INTAKE
FLAP
HOUSING
COWL
INSULATION
FRONT
FASTENERS
______________________
Installation
1. Position cowl insulation so that flap side is inserted under
surge tank bracket (Figure 11-20).
2. Install three nuts and washers to secure insulation to main
A/C - heat unit mounting studs.
3. Install bolts, nuts, and retainers as necessary to secure
insulation to front of cowl.
4. Install screws and washers as necessary to secure
insulation to upper cowl.
5. Install trim screws as necessary to secure insulation to air
intake housing.
6. Install drain tube.
7. Install two surge tank screw clamps to secure surge tank.
8. Install air cleaner assembly and air induction tube (Section
3).
9. Install air cleaner assembly vent line.
10. Install air cleaner assembly shield.
11. Install air intake weathercap.

DRAIN TUBE REPLACEMENT

Removal
Remove drain tube from main A/C - heat unit inner cowl area
by pulling straight out. If drain tube grommet pulled out with
drain tube, it will need to be reinstalled. It may be necessary to
loosen drain tube from main A/C - heat unit drain outlet.
Installation
Install drain tube and grommet, if removed, to drain tube outlet
on main A/C - heat unit (Figure 11-21). Ensure drain tube is at-
tached to main A/C - heat unit drain outlet.
GROMMET
Figure 11-21: Drain Tube Replacement
®
DRAIN TUBE