Sheet Metal Adjustments; Noise Shields - GMC G Service Manual

2B-12 SHEET METAL
8. Fender to cowl bolts (47).
Tighten
• Bolts to 43 N«m (31 ft. lbs.).
9. Wheelhouse panel to fender bolts (50) (figure 9).
E & l Tighten
• Wheelhouse panel to fender bolts to 17 N»m (13
ft. lbs.).
10. Bumper.
• Refer to FRAME AND BUMPERS (SEC. 2A).
11. Air cleaner inlet to the radiator support.
12. Fuel vapor canister to the radiator support.
13. Ground wires to the radiator support.
14. Headlamp and parking lamp wiring harness to the
radiator support.
15. Headlamp and parking lamp wires to the lamps.
16. Air conditioning condenser.
• Refer to AIR CONDITIONING (SEC. 1B).
17. Radiator to the vehicle. Refer to RADIATOR (SEC.
6B2).
18. Battery to the vehicle.
19. Hood to the vehicle.

SHEET METAL ADJUSTMENTS

In order to have the proper operation and appearance of
sheet metal components, it is important that certain fits and
gaps between components be maintained. The gaps given
in this procedure are suggested as the best alignment for
these components (figure 13).
In aligning sheet metal, it is best to start with the rear­
most component, and work forward.
1. Starting with the fenders, align the rear edge of each
fender to the rocker panel, and the door. The gap
between these components should be 5 mm ± 2.3
mm (0.19-inch ± 0.09-inch). This adjustment should
be accomplished by moving the fender forward or
rearward. The surface of the fender should be flush
with the rocker panel and the door. Add or remove
shims to perform this adjustment.
2. Align the fender to the cowl vent grille to obtain a gap
of 4.6 mm ± 1 mm (0.18-inch ± 0.03-inch). The
surface of the cowl vent grille should be flush with the
fender surface.
3. Align the hood with the cowl vent grille, so that there
is a gap of 8 mm ± 1 mm (0.31-inch ± 0.03-inch)
between the rear edge of the hood and the front edge
of the cowl vent grille. The hood surface should be
flush with the cowl vent grille surface within ±1.5 mm
(± 0.06-inch).
4. Align the left and right edges of the hood so that a gap
of 4.6 mm ± 1 mm (0.18-inch ± 0.03-inch) exists
between the hood and the fenders. The hood surface
should be flush with the fender surface within +0.0, -
1.5 mm ( + 0.00 -0.06-inch). If this gap is difficult to
obtain, and the hood appears to be cocked in
between the fenders, the radiator support may need
to be shifted. By shifting the radiator support, the
entire front end sheet metal can be aligned as a unit.
Loosen the support to the frame bolts, and shift the
radiator support to obtain the proper gaps. Then,
while holding the support in position, retighten the
radiator support to frame bolts.
5. Align the front face of the hood to obtain a gap of 4.6
mm ± 1 mm (0.18-inch ± 0.03-inch) between the
hood and the radiator support upper panel. The hood
bumpers on the top of the radiator support should be
adjusted to give the proper support to hood gap. The
surface of the hood should be flush with the radiator
support upper panel (not the grille molding).

NOISE SHIELDS

Noise insulators are used to reduce exterior engine noise on
R/V models over 10,000 pounds GVWR equipped with 6.2L
diesel engines. There are three types of shields on the engine
compartment side of the dash, one on the hood, one on the
inside of each front fender and one at the cowl/fender joint on
each side (figures 14 and 15).