Cowl Ventilator Grille; Cowl Air Ventilator Valve Assembly; Windshield Wipers - Chevrolet 10 1971 Series Chassis Service Manual

Fig. 7— Rear Stationary Window
2. From underside of instrument panel remove attach­
ing screws and carefully remove cover assembly.
3. To install, reverse removal procedure.
COW L VENTILATOR GRILLE (Fig. 14-15)
The cowl ventilator intake, a louvered opening, ex­
tends across the top of the cowl. The opening permits
outside air to enter into a plenum chamber which dis­
tributes the air to both sides of the cab. Air enters into
cab through openings at right and left interior cowl
panels near the floor.
Air flow is controlled by valves in the outlet openings.
Valves are opened and closed by means of handles.
Replacement
1. Remove windshield wiper arms from wiper pivot
shafts.
2. Raise hood and remove screws, retaining cowl venti­
lator grille and cowl hood ledge seal.
3. Remove four (4) screws from the rear recessed
louvers.
4. Remove the six (6) screws retaining the front of the
grille to the cowl.
5. Remove the two larger size screws from each end
STANDARD
Fig. 7 A — Cross Section of W indshield Weatherstrip (Typical)
6. Remove one (1) screw each side which is exposed
7. Inspect cowl hood ledge seal for fatigue or cuts and
8. Secure front edge of grille over lip of hood seal with
9. Reinstall windshield wiper arms on pivot shafts.
10. Reverse removal procedure to install.

COWL AIR VENTILATOR VALVE ASSEMBLY

Replacement
Entire outlet valve assembly may be removed from
the vehicle by removing two screws and depressing the
pins. Refer to Figure 16.

WINDSHIELD WIPERS

Windshield wiper units on all models are of the two-
speed electric type. A single wiper motor unit, mounted
to center of cowl inside cab, power both wiper blades.
The wiper blade operating link rods and pivot mountings
on these models are located in the outside air inlet
plenum chamber.
CUSTOM
Fig. 8— Loosening Weatherstrip
of the grille at the forward corners.
when the door is opened.
replace if necessary.
six retaining screws,
Fig. 9— Cord Installation
BODY 1-5
10-30 CHEVROLET TRUCK SERVICE MANUAL