Savana 3500 V8-4.8L (2009)
under pressure if the radiator cap or the surge tank cap is removed while the engine and radiator are still hot.
4. Remove the surge tank fill cap from the surge tank or the coolant pressure cap from the radiator.
5. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in SI.
6. Place a clean drain pan under the radiator drain cock or under the lower radiator hose depending on the vehicle. Refer to Cooling System Draining
and Filling in SI.
7. Loosen the radiator drain cock if equipped or use J 38185 clamp pliers and reposition the clamp on the lower radiator hose at the radiator.
8. Remove the end of the lower radiator hose from the radiator.
9. Drain the engine coolant sufficiently below the level of the ECT sensor.
10. Close the radiator drain cock or connect the lower radiator hose at the radiator.
11. Use the J 38185 clamp pliers to place the clamp into the original position on the hose.
12. Lower the vehicle.
13. Disconnect the wiring harness connector from the ECT sensor (2).
14. Remove the ECT sensor (1) from the front of the cylinder head.
15. Remove the corresponding size plug at the rear of the OTHER cylinder head.
16. Coat the threads of the ECT sensor with sealer. Use GM P/N 12346004 (Canadian P/N 10953480) or an equivalent.
17. Install the ECT sensor in the hole of the cylinder head where the plug was removed.
Tighten
Tighten to 20 Nm (15 lb ft).
18. Coat the threads of the plug with sealer. Use GM P/N 12346004 (Canadian P/N 10953480) or an equivalent.
19. Install the plug in the hole of the cylinder head where the ECT sensor was removed
Tighten
Tighten to 20 Nm (15 lb ft).
Important
Leave enough wire attached to the ECT sensor harness connector in order to create manageable splices that are at least 40 mm (1.5 in)
away from the other splice.
