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The video above shows you to replace the headlight in your 2003 Cadillac DeVille. Headlights grow dimmer by up to 20% over time and eventually burn out - for this reason, we recommend changing your headlights in pairs. Changing both headlight bulbs on your DeVille at the same time will allow both bulbs to have the same intensity and prevent the new headlight bulb from appearing brighter than the bulb on the opposite side. In some Cadillacs, the highbeam is the same bulb as the headlight and it is possible for the highbeam to work, but the headlight be burnt out even if they are the same bulb (and vise versa). Some Cadillacs have high intensity discharge headlights, sometimes referred to as xenon lights. These bulbs have a very high voltage that runs through them, even if the battery is disconnected. If your DeVille has this type of bulb, we do not recommend that you attempt to change it yourself.
When you change the headlight on your DeVille, it is important to 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.
Leaking coolant is usually a sign that your water pump needs to be replaced. This video shows you how to quickly plug it2004 Cadillac DeVille DTS 4.6L V8
On many cars, the high beam bulb runs at reduced power during the day - check 'em and change 'em!2004 Cadillac DeVille DTS 4.6L V8
Flushing the coolant in your car is not that hard and will extend the life of your engine tremendously - learn how here!2004 Cadillac DeVille DTS 4.6L V8
If you are leaking oil and parking on your oil spots each night, the oil is breaking down your tires' rubber2004 Cadillac DeVille DTS 4.6L V8
DRLs are on more than your headlights. They burn out faster and should be replaced regularly2004 Cadillac DeVille DTS 4.6L V8
Don't be caught in the fog with burnt out fog light bulbs2004 Cadillac DeVille DTS 4.6L V8