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The video above shows you how to replace the battery in your 2009 GMC Acadia. We recommend changing the battery in GMCs 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 Acadia that you need to replace.
Replacing the battery in your Acadia involves removing the terminals. When you reconnect the terminals, your radio presets are likely to be cleared out. In some Acadias, 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 GMC and they will give you the code for free. In many GMCs, 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.
Don't be the guy with your third brake light burnt out2012 GMC Acadia SLE 3.6L V6
White light when you back up - yup, they burn out and you can replace them with bright LEDs2012 GMC Acadia SLE 3.6L V6
If your brake fluid is a little low, learn how to add some here. Ignoring a low level leads to big problems2012 GMC Acadia SLE 3.6L V6
A/C blowing hot air?2012 GMC Acadia SLE 3.6L V6
Power steering fluid is easy to check and many people (mechanics included) often forget about - learn how here2012 GMC Acadia SLE 3.6L V6
If you have an electrical component that doesn't work, try replacing the fuse first2012 GMC Acadia SLE 3.6L V6