Typically on most modern cars and trucks you would look inside the engine compartment at the back side of the light you need to change and unplug the j-plug from the light, then 1/4 turn (you may have to push a tab down and turn it counter clockwise)and slide it out then just reverse for the installation. Some have a round bar that holds the light assembly in place and you can remove the bar and slide the whole light out and replace the bulb. You just have to look at it and see how to do it.

Thanks for the answer.Its just what I need.I'll let you know how it goes