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The video above shows you how to replace the battery in your 2009 Hummer H3. We recommend changing the battery in Hummers every 4 years. Although some batteries last much longer, most batteries begin breaking down chemically after four years, so you could experience dimmer headlights and other negative effects before you have a dead battery in your H3 that you need to replace.
Replacing the battery in your H3 involves removing the terminals. When you reconnect the terminals, your radio presets are likely to be cleared out. In some H3s, you may need to re-enter a security code to get your radio to work again. Check for this code in your owners manual - it will usually be either a sticker or small card in the booklet. If you can't find it, call Hummer and they will give you the code for free. In many Hummers, the transmission "learns" how you drive over time and makes adjustments, so you may experience altered driving dynamics as your car re-learns your driving style after changing the battery.
If your transmission is running low on fluid, be sure to add some - find out how to do this here!2009 Hummer H3 3.7L 5 Cyl.
Sure you can take it in for a $19 lube, but are you OK with a stripped oil pan and cheap parts in return?2009 Hummer H3 3.7L 5 Cyl.
DRLs are on more than your headlights. They burn out faster and should be replaced regularly2008 Hummer H3 3.7L 5 Cyl.
Burnt out brake lights increase your chance of getting rear ended - check and change yours today2008 Hummer H3 3.7L 5 Cyl.
Harsh downshifts? Slipping gears? You might be low on transmission fluid2009 Hummer H3 3.7L 5 Cyl.
Help keep your car as responsive as you are by maintaining proper power steering fluid levels2009 Hummer H3 3.7L 5 Cyl.