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Youu need to open trunk lid remove the two screws holding tailight pull out tailight replace bulb very simple
To replace the tailight out of a 1998 Cadillac Deville just remove the fuse and place a new one in the light\'s bulb.
4 Screws, remove tailight unit, twist & replce infected bulb ......
You will need to open the liftgate and remove the screws that hold in the tail light housing. Once removed, you can twist the bulb socket slightly to remove it from the housing and replace the bulb.
You must remove the entire tailight panel - remove trunk liner and the recessed nuts.
All parts of a vehicle are held together by 2 or 3 screws or bolts. Find the screw(s) in the immediate area of what you are trying to fix and remove them. At times you have to remove more than a few screws and bolts to get to the problem you are working on. But on a tailight I would say it is only 2 screws, and then pull the plug and remove bulb and replace.
with a screwdriver
Remove the seat. Then pull out the black storage bow. You can access the tailight through the hole left.
You might have to remove the whole tailight bezel to replace that bulb, all the nuts for it are in the rear of the trunk compartment, the type of bulb is a 194 type.
open the hatch and you will see two plastic pins on the inside of the vehicle remove these pins by pulling them out( grab with pliers from top) and the tailight cover will come right off. squeeze the cover of the bulb you are trying to remove and pull. it should release easily.
If I recall correctly, it is a 3057 bulb. The associates at an auto parts shop can look it up for you to be exact. They are less than $5 per bulb.
1. Remove lining which covers the bulb section. 2. Press tabs in (usually 2 ) to release the bulb holder. 3. Push in and twist to remove the appropriate bulb, (remember there are 3 different ones, brake ,night, and stop).