My H2 05 Hummer was weak and will not start the engine. I tried to boost it from a running 12V battery and it drained my Hummer battery. Any advice PLEASE!

Anand Kumar

• 2035 Answers
• Posted on Jun 08, 2008

SOURCE: hummer h2 2003 55000 mill

Remote the battery wire from the car for 20 minutes make and plug it back this will reset the computer of the car if the light is on you need to service center and get it checked....................

SOURCE: 2009 Hummer h3 won't start

My H3 didn't start this morning. I noticed something unusual about my truck when I first tried. The alarm had a weak sound when it went off. The fact that it turned over but didn't start made me believe it was not the battery. I was trying to call the mechanic and a wrecker to get my H3 fixed. However, before that I got the wrecker out there, I went to Autozone. He told me it sounded like the battery and cold weather kills the battery. So 3 hours have passed and temperatures warmed up to a cool 56 degrees. I was going to put jumper cables but out of curiousity, I said well let me crank it and see if it was cold weather. Sure enough, it cranked right up.

Either way, I am going to take it to Autozone and have the battery checked. I can't miss another day of work due to an old battery.

SOURCE: 03 H2 HUMMER WONT START

Does your scan tool have a reset eeprom mode?

if not, try disconnecting the battery for a 30 min period, then try

SOURCE: 2004 Hummer H2 leaking water on passenger floor

never worked on a hummer but rule of the day is that there always is a drain on the firewall on the engine side. usually a small rubber hose about two inches long direced downward. Usually you can stick your finger in there and clear it out. Don't shove anything hard into it or you can punch a hole in the evaporator core.

SOURCE: Hummer H3 rear lights staying on

if it is the brake lights that are on check the brake light switch on the brake pedal