Chevrolet Silverado / GMC Sierra. Manual — part 323

4. Remove the fuel rail (510) with injectors. Lift evenly on both sides of the fuel rail until all

the injectors have left their bores.

Fig. 314: Fuel Rail & Injectors
Courtesy of GENERAL MOTORS CORP.

5. Remove the fuel injector retainers (521) and fuel injectors (533), as required.

6. Remove the O-rings (532, 534) from the injectors, as required.

Use cleanliness and care when handling the fuel system
components.

Do not allow dirt or debris to enter the fuel injectors or
fuel rail components. Cap ends, as necessary.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

INTAKE MANIFOLD REMOVAL

Fig. 315: View Of PCV Dirty-Air Hose
Courtesy of GENERAL MOTORS CORP.

IMPORTANT:

The intake manifold, throttle body, fuel injection rail, and
fuel injectors may be removed as an assembly. If not
servicing the individual components, remove the
manifold as a complete assembly.

DO NOT use the intake manifold-to-cylinder head
gaskets again.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2

1. Remove the positive crankcase ventilation (PCV) hose - dirty air (716).

Fig. 316: MAP Sensor
Courtesy of GENERAL MOTORS CORP.

2. Remove the manifold absolute pressure (MAP) sensor (714) and retainer (736), as required.

3. Remove the O-ring (715) from the sensor, as required.

2008 Hummer H2

2008 ENGINE Engine Mechanical - 6.2L - H2