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The engine in your 2008 Hummer H3 should be running when you perform a transmission fluid level check, otherwise it will be inaccurate. The video above shows where the transmission fluid dipstick is located in your H3 and how to check the transmission fluid level. If the transmission fluid level in your H3 is low, you need to add transmission fluid through the dipstick tube. When adding transmission fluid to your H3, be sure to add it slowly as it will fill up quickly and is difficult to remove excess fluid if you overfill.
If you are having problems with the transmission in your H3, such as clunky shifting or hesitation, check the fluid level first - it is amazing how many drivers pay thousands of dollars for transmission work when a half quart of transmission fluid would have fixed the problem.
If your blinker doesn't blink, or blinks rapidly, you likely have a burnt out bulb2008 Hummer H3 3.7L 5 Cyl.
White light when you back up - yup, they burn out and you can replace them with bright LEDs2008 Hummer H3 3.7L 5 Cyl.
Power steering fluid is easy to check and many people (mechanics included) often forget about - learn how here2009 Hummer H3 3.7L 5 Cyl.
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.
Cars burn, leak and otherwise dispense of their oil. Check your level frequently and top up when necessary2009 Hummer H3 3.7L 5 Cyl.