Removal Procedure
- Remove the plastic caps from the quick connect fittings by pulling the caps back along the pipe before installation.
- Install the DT-47731 onto the transmission oil cooler (TOC) pipe, or use the J 28585
- Slide the DT-47731 toward the TOC pipe fitting, or use the J 28585
- Connect the DT-47731 onto the TOC pipe fitting.
- Rotate the DT-47731 or use the J 28585 until the retainer clip (1) rises above the fitting retainer seat.
- Pull back on the TOC pipe to disengage the pipe from the TOC pipe fitting.
- Remove the DT-47731 or the J 28585 from the TOC pipe.
Installation Procedure
- Install the TOC pipe into the TOC pipe fitting. A distinct snap should be heard or felt when assembling the TOC pipe to the fitting.
- To ensure the cooler line is properly installed, give the cooler pipe a gentle pull.
Scheme 2
Scheme 2: Cooling Fan and Shroud Replacement
| Callout | Component Name |
|---|
| Preliminary Procedure Remove front bumper impact bar. Refer to Front Bumper Impact Bar Replacement . Remove radiator inlet hose at radiator. Refer to Radiator Inlet Hose Replacement . Disconnect electrical connector at fan shroud harness. Remove front fascia upper support. Refer to Front Bumper Fascia Upper Support Replacement (Enclave) or Front Bumper Fascia Upper Support Replacement (OUTLOOK, Acadia, Traverse) . Remove hood latch. Refer to Hood Primary and Secondary Latch Replacement . Remove upper radiator mounting brackets and tip radiator forward for additional clearance. |
| 1 | Fan Shroud Mounting Bolt (Qty: 2) CAUTION: Refer to Fastener Caution . Procedure: Remove small pushpin retainers. Tighten: 10 N.m (89 lb in) |
| 2 | Fan Shroud Procedure: Tilt fan shroud rearward and upward to remove. Tip: Reposition of radiator hoses my be necessary for removal. |
| CAUTION |
|---|
| Refer to Fastener Caution . |
Scheme 3
Scheme 3: Engine Coolant Thermostat Replacement
| Callout | Component Name |
|---|
| Preliminary Procedures Partially drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) or Cooling System Draining and Filling (Vac N Fill) . Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement . Remove the heater inlet and outlet hoses. Refer to Heater Inlet Hose Replacement and Heater Outlet Hose Replacement . |
| 1 | Thermostat Housing Bolt (Qty: 3) CAUTION: Refer to Fastener Caution . Procedure: Remove the thermostat housing bolts. Tighten: 10 N.m (89 lb in) |
| 2 | Thermostat Housing Retainer Bolt Procedure: Remove the thermostat housing retainer bolt. Tighten: 50 N.m (37 lb ft) |
| 3 | Thermostat Housing |
| 4 | Thermostat Procedure Remove the thermostat and discard the thermostat gasket. Install a new thermostat gasket. |
| CAUTION |
|---|
| Refer to Fastener Caution . |
Scheme 4
Scheme 4: Water Outlet Replacement
| Callout | Component Name |
|---|
| Preliminary Procedures Remove the radiator inlet hose. Refer to Radiator Inlet Hose Replacement . Remove the right engine mounting bracket.Refer to Engine Rear Mount Bracket Replacement . |
| 1 | Water Outlet Housing Bolt (Qty: 2) CAUTION: Refer to Fastener Caution . Procedure: Remove the water outlet housing bolts. Tighten: 10 N.m (89 lb in) |
| 2 | Water Outlet Housing |
| 3 | Seal Procedure Remove the water outlet housing seal. Discard the seal. Install a new water outlet housing seal. |
| CAUTION |
|---|
| Refer to Fastener Caution . |
- Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(ref-365258-S42715675352010070600000) or «Cooling System Draining and Filling (Vac N Fill)»(ref-365258-S15415891712010070600000) .
- Remove the drive belt. Refer to «Drive Belt Replacement»(ref-365266-S33372321292010070600000) .
- Remove the right engine strut mount. Refer to «Engine Mount Strut Replacement - Right Side»(ref-365266-S35897459922010070600000) .
- Remove the right engine mount strut bracket. Refer to «Engine Mount Strut Bracket Replacement - Right Side»(ref-365266-S12727493682010070600000) .
- Use the EN 46104: tool in order to retain the water pump pulley.
- Remove the water pump pulley bolts.
- Remove the water pump pulley.
- Remove the water pump bolts.
- Remove the water pump.
- Remove and DISCARD the water pump seal.
- Carefully clean the water pump sealing surfaces.
- Install a NEW water pump seal.
- Install the water pump.
- Install the water pump bolts and tighten to 10 N.m (89 lb in).
- Install the water pump pulley and the water pump pulley bolts.
- Use the EN 46104: tool in order to retain the water pump pulley.
- Install the water pump pulley bolts and tighten to 10 N.m (89 lb in).
- Install the right engine strut mount. Refer to «Engine Mount Strut Replacement - Right Side»(ref-365266-S35897459922010070600000) .
- Install the right engine mount strut bracket. Refer to «Engine Mount Strut Bracket Replacement - Right Side»(ref-365266-S12727493682010070600000) .
- Install the drive belt. Refer to «Drive Belt Replacement»(ref-365266-S33372321292010070600000) .
- Fill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(ref-365258-S42715675352010070600000) or «Cooling System Draining and Filling (Vac N Fill)»(ref-365258-S15415891712010070600000) .
Scheme 5
Scheme 5: Radiator Replacement (Acadia, OUTLOOK, Traverse)
| Callout | Component Name |
|---|
| Preliminary Procedure Drain the coolant. Refer to Cooling System Draining and Filling (Static Fill) or Cooling System Draining and Filling (Vac N Fill) Remove radiator inlet hose. Refer to Radiator Inlet Hose Replacement . Remove radiator outlet hose. Refer to Radiator Outlet Hose Replacement . Remove fan shroud top mounting bolts and pushpin from radiator and position fan shroud rearward. Refer to Cooling Fan and Shroud Replacement . Remove transmission inlet cooling line from radiator. Refer to Fluid Cooler Inlet Hose Replacement . Remove transmission outlet cooling line from radiator. Refer to Fluid Cooler Outlet Hose Replacement . Remove coolant reservoir hose from radiator filler neck. Remove the front bumper fascia upper support. Refer to Front Bumper Fascia Upper Support Replacement (OUTLOOK, Acadia, Traverse) Pinch fastening tabs together at top of condenser to remove from radiator and position forward. Remove side rubber air deflectors from radiator tanks. |
| 1 | Radiator Mounting Bolt (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten: 10 N.m (89 lb in) |
| 2 | Radiator Tip: Bottom of condenser mounts into holding fixtures at bottom of radiator. Radiator will slide out between the condenser and fan shroud. |
| CAUTION |
|---|
| Refer to Fastener Caution . |
Radiator Replacement (Enclave)
| Callout | Component Name |
|---|
| Preliminary Procedure Drain the coolant. Refer to Cooling System Draining and Filling (Static Fill) or Cooling System Draining and Filling (Vac N Fill) Remove radiator inlet hose. Refer to Radiator Inlet Hose Replacement . Remove radiator outlet hose. Refer to Radiator Outlet Hose Replacement . Remove fan shroud top mounting bolts and pushpin from radiator and position fan shroud rearward. Refer to Cooling Fan and Shroud Replacement . Remove transmission inlet cooling line from radiator. Refer to Fluid Cooler Inlet Hose Replacement . Remove transmission outlet cooling line from radiator. Refer to Fluid Cooler Outlet Hose Replacement . Remove coolant reservoir hose from radiator filler neck. Pinch fastening tabs together at top of condenser to remove from radiator and position forward. Remove side rubber air deflectors from radiator tanks. |
| 1 | Radiator Mounting Bolt (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten: 10 N.m (89 lb in) |
| 2 | Radiator Tip: Bottom of condenser mounts into holding fixtures at bottom of radiator. Radiator will slide out between the condenser and fan shroud. |
| CAUTION |
|---|
| Refer to Fastener Caution . |
Scheme 6
Scheme 6: Coolant Heater Replacement
| Callout | Component Name |
|---|
| Preliminary Procedure: Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . |
| 1 | Coolant Heater Procedure Disconnect the coolant heater cord from the coolant heater. Remove the coolant heater. |
- Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-365243-S07204316382010070600000) .
- Disconnect the coolant heater power supply cord from the coolant heater.
- Lower the vehicle.
- Disconnect the coolant heater cord clips (3) from the cylinder heads.
- Disconnect the coolant heater cord clip from the engine wiring harness.
- Remove the coolant heater cord (1) from the vehicle.
- Position the coolant heater cord (1) to the engine harness.
- Connect the coolant heater cord clip to the engine wiring harness.
- Connect the coolant heater cord clips (3) to the cylinder heads.
- Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-365243-S07204316382010070600000) .
- Connect the coolant heater cord to the coolant heater.
- Lower the vehicle.
Scheme 7
Scheme 7: Cooling Fan Description and Operation
The engine cooling fan system consists of 2 electrical cooling fans and 3 fan relays. The relays are arranged in a series/parallel (S/P) configuration that allows the engine control module (ECM) to operate both fans together at low or high speeds. The cooling fans receive positive voltage from the cooling fan relays which receive battery positive voltage from the underhood fuse block.
During low speed operation, the ECM supplies the ground path for the low speed fan 1 relay through the fan 1 relay control circuit. This energizes the fan 1 relay coil, closes the relay contacts, and supplies battery positive voltage from the Fan 1 fuse through the cooling fan motor supply voltage circuit to the left engine cooling fan. The ground path for the left cooling fan is through the S/P fan 2 relay and the right engine cooling fan. The result is a series circuit with both fans running at low speed.
During high speed operation the ECM continues to supply battery positive voltage for the right cooling fan by grounding the coil of the fan 1 relay. The ECM also grounds the high speed fan 3 relay and the S/P fan 2 relay through the fan 3 relay control circuit. This energizes the S/P fan 2 relay coil, closes the relay contacts, and provides a direct ground path for the left engine cooling fan. At the same time the fan 3 relay coil is energized closing the relay contacts and providing battery positive voltage from the Fan 2 fuse on the cooling fan motor supply voltage circuit to the right cooling fan. During high speed fan operation, both engine cooling fans have their own ground path. The result is a parallel circuit with both fans running at high speed.
