Hummer H2. Manual - part 1907

2004 STARTING & CHARGING SYSTEMS 

Starters - H2 

DESCRIPTION & OPERATION 

The PG-260L is an non-repairable starter motor. It has pole pieces that are arranged around the armature within 
the starter housing. When the solenoid windings are energized, the pull-in winding circuit is completed to 
ground through the starter motor. The hold-in winding circuit is completed to ground through the solenoid. The 
windings work together magnetically to pull in and hold in the plunger. The plunger moves the shift lever. This 
action causes the starter drive assembly to rotate on the armature shaft spline as it engages with the flywheel 
ring gear on the engine. At the same time, the plunger closes the solenoid switch contacts in the starter solenoid. 
Full battery voltage is then applied directly to the starter motor and it cranks the engine.  

As soon as the solenoid switch contacts close, current stops flowing thorough the pull-in winding as battery 
voltage is now applied to both ends of the windings. The hold-in winding remains energized; its magnetic field 
is strong enough to hold the plunger, shift lever, starter drive assembly, and solenoid switch contacts in place to 
continue cranking the engine. When the engine starts, the pinion gear overrun sprag protects the armature from 
excessive speed until the switch is opened.  

When the ignition switch is released from the CRANK position, voltage is removed from the starter solenoid S 
terminal. Current flows from the motor contacts through both windings to ground at the end of the hold-in 
winding. However, the direction of the current flow through the pull-in winding is now in the opposite direction 
of the current flow when the winding was first energized.  

The magnetic fields of the pull-in and hold-in windings now oppose one another. This action of the windings, 
along with the help of the return spring, cause the starter drive assembly to disengage and the solenoid switch 
contacts to open simultaneously. As soon as the contacts open, the starter motor is turned off.  

STARTER MOTOR USAGE 

Vehicle uses starter model PG-260L.  

BATTERY USAGE 

BATTERY SPECIFICATIONS 

COMPONENT LOCATOR 

Application 

Rating 

Cold Cranking Amperage (CCA) 

880 Amps 

Reserve Capacity Rating 

115 Minutes 

Replacement Battery Number 

79-6YR 

 

2004 Hummer H2 

2004 STARTING & CHARGING SYSTEMS Starters - H2

  

 

2004 Hummer H2 

2004 STARTING & CHARGING SYSTEMS Starters - H2

  

Fig. 1: Locating Battery Cable Junction 
Courtesy of GENERAL MOTORS CORP.

 

2004 Hummer H2 

2004 STARTING & CHARGING SYSTEMS Starters - H2

  

Fig. 2: Locating Park/Neutral Switch (A/T) 
Courtesy of GENERAL MOTORS CORP.

 

2004 Hummer H2 

2004 STARTING & CHARGING SYSTEMS Starters - H2

  

Fig. 3: Locating Starter Assembly & Starter Solenoid 
Courtesy of GENERAL MOTORS CORP. 

ENGINE ELECTRICAL CONNECTOR END VIEWS

 

2004 Hummer H2 

2004 STARTING & CHARGING SYSTEMS Starters - H2