Radiator Replacement - GMC G Service Manual

RADIATOR REPLACEMENT

The type of radiator core mounting varies according to
model and engine type. The radiator assembly includes a
shroud, and may include an oil cooler in the core. Some
models have a separate power steering oil cooler attached
in front of the radiator core. On models so equipped it may
be necessary to remove the oil cooler to facilitate removal
of the radiator core. Refer to POWER STEERING (SEC.
3B3) for oil cooler removal and installation.
R/V, G AND P-MODELS (EXCEPT 6.2L DIESEL)
H Remove or Disconnect (Figures 13 through
• Coolant from the radiator.
1. Radiator inlet and outlet hoses.
2. Overflow hose from the radiator.
3. Fan shroud.
• Refer to "Fan Shroud Replacement" in this
section.
4. Transmission cooler lines.
5. Radiator from the vehicle.
• Retainers from the radiator support.
• Retainers from the upper mounting panel (R/V
Models).
H Install or Connect (Figures 13 through 16)
1. Radiator on the vehicle.
• Radiator support on the upper mounting panel.
F & l Tighten
• Fasteners to "Specifications" at the end of this
section.
2. Transmission cooler lines.
3. Fan shroud.
• Refer to "Fan Shroud Replacement" in this
section.
4. Overflow hose to the radiator.
5. Radiator hoses to the radiator.
• Radiator inlet hose and radiator outlet hose.
6. Coolant to the radiator.
• Refer to MAINTENANCE AND LUBRICATION
(SEC. OB).
7. Remove the radiator pressure cap, start the engine,
and let it run until the upper radiator hose becomes
hot (thermostat is open).
8. Add coolant with the engine idling until the coolant
level reaches the bottom of the filler neck.
9. Install the radiator pressure cap, making sure the
arrows line up with the overflow tube.
RADIATOR 6B 2-11
R/V MODELS (6.2L ENGINE)
| * * | Remove or Disconnect (Figure 16)
• Drain the cooling system.
1. Fan shroud.
• Refer to "Fan Shroud Replacement" in this
section.
2. Engine and transmission oil cooler lines.
3. Upper and lower radiator hoses from the radiator.
4. Overflow hose from the radiator.
5. Upper radiator supports.
6. Radiator.
h H Install or Connect (Figure 16)
1. Radiator to the vehicle.
2. Radiator supports and/or mounting panel.
Tighten
• Fasteners to "Specifications" at the end of this
section.
3. Overflow hose to the radiator.
4. Upper and lower radiator hoses to the radiator.
5. Engine and transmission oil cooler lines.
6. Fan shroud.
7. Coolant to the radiator.
8. Remove the radiator pressure cap, start the engine,
and let it run until the upper radiator hose becomes
hot (thermostat is open).
9. Add coolant with the engine idling until the coolant
level reaches the bottom of the filler neck.
10. Install the radiator pressure cap, making sure the
arrows line up with the overflow tube.
G AND P-MODELS (6.2L ENGINE)
E Remove or Disconnect (Figures 13, 14 and
• Coolant from the radiator.
1. Air intake snorkel.
2. Windshield washer bottle.
3. Hood release cable.
4. Upper fan shroud.
• Refer to "Fan Shroud Replacement" in this
section.