G-Van Heater - On-Vehicle Service; Blower Motor Replacement; Heater Hose Routing - GMC G Service Manual

G-VAN HEATER — ON-VEHICLE SERVICE

BLOWER MOTOR REPLACEMENT

M Remove or Disconnect (Figure 18)
1. Battery ground cable.
2. Coolant overflow hose from the coolant recovery
bottle.
3. Recovery bottle fasteners.
• Refer to ENGINE COOLING (SEC.
4. Recovery bottle from the vehicle.
5. Blower motor wiring harness.
. Five motor mounting screws.
6
7. Motor (113) and fan (111) assembly.
• Gently pry on the blower flange if the sealer acts
like an adhesive.
. Nut (110).
8
9. Fan (111) from the motor (113).
Install or Connect (Figure 18)
1. Fan (111) to the motor (113).
• Locate the open end of the wheel away from the
blower motor.
2. Nut (110).
114
Figure 18 — Blower Motor Assembly — Component View — G-Van
3. Motor (113) and fan (111) assembly.
• Apply a bead of permagum sealer to the mount­
ing flange.
4. Blower motor wiring harness.
5. Coolant recovery bottle to the vehicle.
. Recovery bottle fasteners. Refer to Section
6
7. Coolant hose to recovery bottle.
. Battery ground cable.
8
B ).
6 1
• Test the motor.

HEATER HOSE ROUTING

Heater hoses are routed from the thermostat housing or
inlet manifold and water pump (radiator on some automatic
transmission vehicles) to the core inlet and outlet pipes.
Hoses are attached at each end with screw-type clamps.
(Refer to figures 19, 20, 21 and 22.)
REPLACEMENT
When replacing heater hoses, maintain a 13 mm (1/2-
inch) minimum clearance between the hose clip and the
upper control arm, a 38 mm (1 1/2-inch) minimum clear­
ance between the hoses and the propshaft, and a 32 mm
(1 1/4-inch) minimum clearance between the auxiliary
heater core lines and the exhaust pipe.
110. Nut
111. Fan Assembly
112. Washer
113. Motor
114. Tube
115. Fitting
116. Case
117. Gasket
118. Pin
119. Valve
120. Shaft
HEATING 1A-17
B .
6 1
121. Housing
122. Core
123. Strap
124. Case
125. Bracket
126. Valve
127. Shaft Assembly
128. Duct
125
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