No battery issue. The low fuel light is lit with 1/2 tank of gas. The small indicating bar below the shift position on the instrument cluster is now out. if I leave the ignition in the on position for about a minute the Theft Deterrent light comes on. when i try to crank it does sound like the starter solenoid may be picking up but the engine does not turn over. if the hummer had not shut off while driving i would suspect the starter but not sure now.
The first thing should be to have it check for DTC'S - diagnostic trouble codes . Could have ignition switch problem , a shorted sensor bring down the class 2 data serial data network , the control modules all communicate on this data network . The starting system on this vehicle is controlled by the PCM - engine computer ! When you turn the key to start a voltage signal is sent to the PCM , if the PCM sees a voltage signal from the transmission range sensor and thier is no anti-theft system problems the PCM will energize the starter relay .
012 GM Class II Communications
There is also a direct redundant class 2 serial data circuit between BCM and PCM.
The following modules communicate on the class 2 serial data circuit:
• splice pack - SP205 attaches to:
• Air Suspension Module (ESC)
• BCM
• DDM
• EBCM
• FPDM
• HVAC Control Module
• IPC
• PCM
• Radio
• TCSCM
• splice pack - SP206 attaches to:
• Audio Amplifier
• RSA Control
• VCIM
• splice pack - SP207 attaches to MSM-Driver and SDM
Hooking up a scan tool an checking scan data would be a first step . Testing electrical connections , B+ voltage at the fuse boxes ,main power feeds etc. Looking at wiring diagrams an power distribution diagrams . Using a voltmeter to test with.
Electric Testing Techniques You Need to Know
Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model an engine ! Under system click power distribution then under subsystem click on power distribution . Click the search button then the blue link. Look at the power flow path an test with volt meter . Could be something simple but then again ! The complexity of the modern vehicle is well above most peoples scope .
SOURCE: H2 Hummer
Today 11-12-08 my 2003 H2 Hummer would not start. Checked battery it ischarged. Cables tight. Tried to start with portable booster pak. No go. Tridto jump start with my wife's Suburban. Still no go.
When I turn the switch I hear a single click and that is it. No engine turning over. While trying to start with key the headlights go out. Out of ideas, Will take to Chevy garage in am. Will post solution.
SOURCE: 2003 Hummer H2 overheats while idling in Park
NED TO HAVE THE CODES FOT THE CHECK ENGINE LIGHT READ.THE CODE WIL LEAD U IN THE CORRECT DIRECTION.GET BACK TO ME W/THE CODE.
SOURCE: My H2 2003 hard or take time to shift when running to 35+ MPH
check your tranny fluid and filter. you may have a clog some where or could be low on tranny fluid.
SOURCE: Hummer H2 engine won't turn over, key won't
Dead Battery? Bad starter motor?
Try pushing on the brake and making sure its all the way in park.
Turn the steering wheel back an forth a little to remove the key.
None of those work, Call triple A, find a shop.
Car not starting or turning over indicates towards multiple possibilities. It can be issue with battery or weak battery. But if battery checks out ok, then it can be starter issue or faulty alternator or problem with low fuel pressure or no spark at spark plugs due to dirty spark plugs or faulty ignition coil or injectors getting cracked or dirty and needs to be cleaned.
To confirm the problem, the basic troubleshooting is required.
Click this link below and follow the troubleshooting:------
http://technoanswers.blogspot.in/2012/02/car-starting-issues.html
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This will help.
Thanks
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