GMC 4000 Series Service Manual page 524

(CONVENTIONAL CAB A N D COW L MODEL TRUCKS)
Information in this section covers replacement and adjustment of
sheet metal components. Figure 1 illustrates the various sheet metal
units as used on a conventional cab model.
Figure 1— Front End Com ponents (Typical)
RADIATOR SHELL GRILLE
REPLACEMENT
NOTE: It is not necessary to remove grille in
order to make head lamp beam adjustments. Notch­
es in grille are provided for this purpose.
1. Remove eight cr o ss-r e c e ss screws which
attach grille to radiator shell. Remove grille.
2. Place grille in position at radiator shell,
then install attaching screw s firm ly.
RADIATOR SHELL REPLACEMENT
NOTE: The following explains procedure for
replacing the radiator shell with radiator core and
support as shown in figure 2.
REMOVAL (Refer to Fig. 2)
1. Raise and support hood side panels.
2. Open drain cock to drain cooling system .
3. Loosen hose clamps, then disconnect upper
and lower radiator hoses.
4. Disconnect power steering hoses at radiator,
G M C S E R V I C E M A N U A L
SECTION 1 1
S h eet M etal
when so equipped.
nector which is located at right side of radiator
shell panel. Also, disconnect the wiring harness
ground wire which is attached to radiator shell.
each side of shell mounting bracket to flexible
mounting (fig. 3).
each shell support strut rod to shell.
hood center panel to radiator shell.
panel by placing a prop between top of engine and
center panel.
and shell assembly upward so that radiator core
clears front bumper, move assembly forward from
vehicle.
13) of this manual for instructions necessary to
remove radiator core from shell.
INSTALLATION (Refer to Fig. 2)
the reverse of the "Removal'' procedures.
1 Hood Latch 3 Radiator Core
2 Shell Mounting Bracket 4 Wiring Harness Plugs ^
Figure 2 — Radiator Shell and Radiator Assem bly
5. Disconnect head lamp wiring harness con­
6. Remove bolts and washers which attach
7. Remove bolt, nut, and washer which attach
8. Remove two bolts and nuts which attach
9. Raise and support front end of hood center
10. With aid of an assistant to lift radiator
Refer to RADIATOR AND SURGE TANK (SEC.
Install the radiator and shell unit to vehicle in
Sec. 11
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