Hummer H3. Manual — part 557

Fig. 244: Engine Coolant Temperature (ECT) Sensor
Courtesy of GENERAL MOTORS CORP.

8. Disconnect the engine coolant temperature (ECT) sensor (1).

9. Remove the ground terminal bolt (2).

10. Remove the retaining clips (3, 4) from the brackets.

11. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .

12. Remove the starter. Refer to Starter Motor Replacement (LH8) .

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

Fig. 245: Knock Sensor Electrical Connector
Courtesy of GENERAL MOTORS CORP.

13. Disconnect the following connectors:

Left and right side knock sensor electrical connector (1).

A/C pressure switch electrical connector (2).

Block heater electrical connector.

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

Fig. 246: Ground Terminal Bolt
Courtesy of GENERAL MOTORS CORP.

14. Remove the ground terminal bolt (1).

15. Remove the engine harness bracket bolt (3).

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3

Fig. 247: Engine Wiring Harness Electrical Connector & Crankshaft Position (CKP)
Sensor
Courtesy of GENERAL MOTORS CORP.

16. Disconnect the engine wiring harness electrical connector (1) from the crankshaft position

(CKP) sensor.

2008 Hummer H3

2008 ENGINE Engine Mechanical - 5.3L - H3