GM Service Manual Online
For 1990-2009 cars only

To replace a back-up lamp bulb, do the following:

  1. Reach underneath the vehicle near the license plate and find the bulb socket.

  2. Object Number: 949431  Size: B4
  3. Remove the socket from the lamp assembly by locating and then squeezing the release tab while turning the socket counterclockwise.
  4. Turn the bulb counterclockwise and then pull outward to remove it from the socket.
  5. Insert a new bulb into the socket by lining up the notches on the bulb and turn it clockwise to secure it.
  6. Reverse the steps to reinstall the lamp assembly on the vehicle.