8
904184 REV A 6/17/11, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 8 OF 27
DEFROST DUCT INSTALLATION
INSTALL DRIVER AND PASSENGER SIDE DEFROST DUCTS AS SHOWN BELOW.
(2) DEFROST
DUCT
623224
DEFROST DUCT
OEM OPENING
FIGURE 3
FIGURE 4
APPLY A 1/4” BEAD OF SILICONE AROUND THE BACK SIDE OF THE FRESH AIR CAP AS SHOWN IN FIGURE 4,
BELOW.
ATTACH FRESH AIR CAP TO FIREWALL USING A 1/4-20 x 1” BOLT AND WASHER, SEE FIGURE 4 BELOW.
PLACE FIREWALL COVER ON FIREWALL AND SCURE USING (2) #14 x 3/4“ SHEET METAL SCREWS AS SHOWN
BELOW.
USING FIREWALL COVER AS TEMPLATE, MARK THE HOLES ON FIREWALL AS SHOWN BELOW.
REMOVE FIREWALL COVER.
FRESH AIR CAP AND FIREWALL MODIFICATION
SILICONE
BACK SIDE OF
FRESH AIR CAP
1/4-20 x 1”
BOLT
1/4” FLAT
WASHER
FRESH AIR
CAP
MARK
HOLES
MARK
HOLE
MARK
HOLE
MARK
HOLE
MARK
HOLES
MARK
HOLES
#14 x 3/4”
SHEET METAL
SCREW
OEM
HOLES
OEM
HOLE
OEM
HOLE
#14 x 3/4”
SHEET METAL
SCREW
THINNER SIDE OF FLANGE
GOES TOWARD WINDSHIELD
