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The video above shows how to check the belts on your 2009 Hummer H3 - if it gives more than a half inch when pressed, is cracked, frayed or appears shiny, you should change it (or have it changed) immediately. Worn belts in a H3 are one of those things that can cause a lot of problems if ignored, while typically being fairly cheap and easy to replace. Check out our parts page for coupons on new belts for your H3!
The belts in your H3 connect your engine to many of the components you use every day such as your air conditioner, battery (via the alternator), power steering and cooling system. As such, you may experience a dead battery, difficulty steering, overheating, etc. that might be due to a worn belt, not a faulty component! If your H3 is one of those Hummers that shrieks horrendously when it runs, you likely have a worn belt, bad tensioner or both.
Coolant hoses wear out over time and need to be replaced - check 'em early and often2009 Hummer H3 3.7L 5 Cyl.
If you have an electrical component that doesn't work, try replacing the fuse first2009 Hummer H3 3.7L 5 Cyl.
Minor transmission fluid leaks can often be fixed with the right sealant - see how to do this2009 Hummer H3 3.7L 5 Cyl.
Low coolant levels is all to common - top yours up today2009 Hummer H3 3.7L 5 Cyl.
See how to seal up minor power steering fluid leaks2009 Hummer H3 3.7L 5 Cyl.
If your brake fluid is a little low, learn how to add some here. Ignoring a low level leads to big problems2009 Hummer H3 3.7L 5 Cyl.