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The engine air filter in your 2003 GMC Sierra Denali cleans the air that enters your engine. Checking and replacing the air cleaner in your 2003 Sierra Denali at least once a year will help you get better gas mileage. A dirty air filter will cause your Sierra Denali to lose 1 - 3 mpg; depending on your driving, you can improve your fuel economy and save 70 - 100 gallons of gas per year simply by changing your filter regularly. The video above, shows you where the engine air filter is located in your Sierra Denali and how to check it!
In addition to improving the fuel economy of your Sierra Denali, replacing your air filter will improve the performance of your engine. These filters are fairly inexpensive, so check out our parts page for great deals and coupons on a new one (tip: buy several air filters for your 2003 Sierra Denali so you can easily replace it with a new one if it is dirty.)
DRLs are on more than your headlights. They burn out faster and should be replaced regularly2003 GMC Sierra Denali 6.0L V8
Many cars will burn or leak a little bit of oil. Over time, this adds up and you might need to add some - learn how to here!2003 GMC Sierra Denali 6.0L V8
Replacing a dirty air filter can improve gas mileage by up to 4%. Isn't efficiency great?2003 GMC Sierra Denali 6.0L V8
Leaking coolant is usually a sign that your water pump needs to be replaced. This video shows you how to quickly plug it2003 GMC Sierra Denali 6.0L V8
If your blinker doesn't blink, or blinks rapidly, you likely have a burnt out bulb2003 GMC Sierra Denali 6.0L V8
If you have an electrical component that doesn't work, try replacing the fuse first2003 GMC Sierra Denali 6.0L V8