Question about 2007 Hummer H3X

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07 H3 will just die while stopped at light. Starts right back up and just placed a new battery in vehicle. Any suggestions?

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Sometimes this happens because when you removed the battery you also cleared the ECM(Electronic Control Module) computers memory and now need top drive it around at various speeds 30-50 mph for approx. 50 miles so it will relearn the vehicles driveability system.
Be certain no codes pop up after doing so, if you dont have a scanner take the vehicle to Auto Zone or Discount Auto and they will scan it for free, if any old codes are in the system have them erase them by using the scanner and after a few days check back with them to see if the codes re that time you will need to address the failure codes in order to correct the problem.
Happy Motoring!!

How many miles do you have on these important maintenance items:
It is important to regularly maintain your vehicle in order to help prevent avoid break downs.

Air Filter:
inspect/replace under normal driving conditions 20,000-30,000 miles.

Fuel Filter:
Replace between 30-40,000 miles

Spark plugs:
Replace every 60,000-90,0000 miles

Spark Plug Wires:
Replace every 60,000 miles

Fuel Injector Servicing:
Perform every 30-50,000 miles

Posted on Jul 19, 2010


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But possibilities are to be inspected to confirm what exactly it is.------

To troubleshoot and confirm the issue,i suggest you refer few solved help links with similar types of problem like yours:------

Click the link below:------

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1 could it be the init.switch
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