Hummer H2. Manual - part 1443

1. Install the fuel pressure gauge to the fuel pressure service connection, located on the fuel rail.  

2. Turn ON the ignition. 

3. Place the bleed hose of the fuel pressure gauge into an approved gasoline container.  

4. Open the bleed valve on the fuel pressure gauge in order to bleed the air from the fuel pressure gauge.  

5. Command the fuel pump ON with a scan tool.  

6. Close the bleed valve on the fuel pressure gauge.  

7. Inspect for fuel leaks.  

QUICK CONNECT FITTING(S) SERVICE (METAL COLLAR) 

Tool Required 

J 37088-A Tool Set, Fuel Line Quick-Connect Separator. See Special Tools and Equipment . 

Removal Procedure 

1. Relieve the fuel system pressure before servicing any fuel system connection. Refer to the Fuel Pressure 

Relief Procedure .  

2. Remove the retainer from the quick-connect fitting. 

z

The fuel pipe connections  

z

The hose connections  

z

The areas surrounding the connections  

CAUTION: Refer to Fuel Storage Caution in Cautions and Notices.

 

2004 Hummer H2 

2004 ENGINE PERFORMANCE Engine Controls (Introduction) - 4.8L, 5.3L, and 6.0L - Hummer H2

  

Fig. 62: Blowing Dirt Out Of Fitting (Metal Collar) 
Courtesy of GENERAL MOTORS CORP. 

3. Blow dirt out of the fitting using compressed air. 

CAUTION: Wear safety glasses when using compressed air in order to prevent 

eye injury.

 

2004 Hummer H2 

2004 ENGINE PERFORMANCE Engine Controls (Introduction) - 4.8L, 5.3L, and 6.0L - Hummer H2

  

Fig. 63: Releasing Locking Tabs (Metal Collar) 
Courtesy of GENERAL MOTORS CORP. 

4. Choose the correct tool from the J 37088-A tool set for the size of the fitting. Insert the tool into the 

female connector, then push inward in order to release the locking tabs. See Special Tools and 
Equipment . 

 

2004 Hummer H2 

2004 ENGINE PERFORMANCE Engine Controls (Introduction) - 4.8L, 5.3L, and 6.0L - Hummer H2

  

Fig. 64: Pulling Connection Apart (Metal Collar) 
Courtesy of GENERAL MOTORS CORP. 

5. Pull the connection apart. 

6. Use a clean shop towel in order to wipe off the male pipe end.  

7. Inspect both ends of the fitting for dirt and burrs. Clean or replace the components as required.  

Installation Procedure 

NOTE:

If necessary, remove rust or burrs from the fuel pipes with an emery cloth. 
Use a radial motion with the fuel pipe end in order to prevent damage to 
the O-ring sealing surface. Use a clean shop towel in order to wipe off the 
male tube ends. Inspect all the connections for dirt and burrs. Clean or 
replace the components and assemblies as required.

 

2004 Hummer H2 

2004 ENGINE PERFORMANCE Engine Controls (Introduction) - 4.8L, 5.3L, and 6.0L - Hummer H2