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Daytime running lights, sometimes referred to as DRLs or DTRs, are lights that switch on automatically when your 2003 GMC Envoy is turned on and in drive. Since the daytime running lights are on whenever you are driving your Envoy, they are often the first bulbs to burn out. The video above shows you how to change the daytime running lights in your 2003 Envoy. These bulbs grow dimmer by over 20% over time, therefore we recommend changing both bulbs on your Envoy at the same time, even if only one bulb is burnt out - this will allow both DRL bulbs to have the same intensity and prevent the old DRL bulb from appearing dimmer than the new one.
When you change the daytime running light on your Envoy, it is important not touch the glass part of the bulb with your fingers because the oil from your fingertips will cause that part of the bulb to burn hotter, which significantly shortens the life of the bulb. Some studies indicate that driving with your lights on can reduce accidents by 18 - 34%, driving with your DRLs or headlights on the day can reduce your chance of getting in an accident.
The best way to fix leaking hoses is to replace them, but if you don't have time, a stop leak product might work for you2009 GMC Envoy SLE 4.2L 6 Cyl.
Minor transmission fluid leaks can often be fixed with the right sealant - see how to do this2009 GMC Envoy SLE 4.2L 6 Cyl.
Coolant hoses wear out over time and need to be replaced - check 'em early and often2009 GMC Envoy SLE 4.2L 6 Cyl.
Small bulbs that burn out regularly - did you know you can replace these with LED lights?2003 GMC Envoy SLT 4.2L 6 Cyl.
Don't be the guy with your third brake light burnt out2004 Buick Rainier CXL Plus 4.2L 6 Cyl.
Did you know that heat is worse for your battery than cold? Replace it every 4 years2009 GMC Envoy SLE 4.2L 6 Cyl.