GM Buick/Oldsmobile/Pontiac/Full-Size 1975-1990 Repair Guide

Signal and Marker Lights

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REMOVAL & INSTALLATION



Front Turn Signal and Parking Lights

See Figures 1 and 2

  1. To replace the bulbs, reach in and up behind the front bumper and twist the lamp socket counter-clockwise until it can be pulled backward and out.
  2.  
  3. Lightly depress the lamp and turn it counter-clockwise to release it. Install in reverse order.
  4.  

If the entire housing must be replaced:

  1. Remove the lamp sockets as described above. Remove the three screws securing the lamp housing to the bumper and remove it.
  2.  
  3. Remove the three J-nuts from the old housing and install them onto the new one. Install the new housing in reverse order.
  4.  



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Fig. Fig. 1: The front turn signal lights can be removed by reaching in the access hole behind the bumper and twisting the socket counter-clockwise



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Fig. Fig. 2: Lightly depress the bulb until it bottoms and turn it counter-clockwise to release it

Side Marker Lights
  1. To replace the bulb, reach up behind the housing and twist the lamp socket counterclockwise until it can be pulled away from the housing and out.
  2.  
  3. Slightly depress the lamp and turn it counterclockwise to release it. Install in reverse order.
  4.  

If the entire housing must be replaced:

  1. Remove the headlight bezel. Remove the two screws that retain the marker light housing from inside the headlamp housing.
  2.  
  3. Remove the marker light housing. Disconnect and remove the bulb and socket as described just above. Unscrew and remove the lens.
  4.  
  5. Install the lens onto the new housing. Install the lamp into the new housing. Install the housing in reverse of removal.
  6.  

Rear Turn Signal, Brake and Parking Lights

See Figures 3, 4, 5, 6 and 7

Most rear lenses are fastened in place from inside the luggage compartment. A stud is attached to the lens and passes through the sheet metal at the rear of the body. In some cases, the rear inner wheelhouse panel has to be removed. Remove the attaching nuts from inside the luggage compartment and pull this type of lens off. A few small lenses are attached with screws that are accessible from the rear. To remove these, simply remove the screws and remove the lens.

Once the lens is removed, the bulb can be replaced simply by depressing it, turning it counterclockwise, and removing it. Install in reverse order.



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Fig. Fig. 3: The rear lens attaching nuts can be accessed from inside the luggage compartment



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Fig. Fig. 4: Carefully slide the lens out only far enough to remove the bulb sockets



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Fig. Fig. 5: Twist the socket and remove it from the lens assembly



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Fig. Fig. 6: This type of bulb can be removed by first depressing it lightly until it bottoms then twist and release it



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Fig. Fig. 7: This type of bulb can be removed by simply pulling it out of the socket

High-mount Brake Light
EXCEPT WAGON
  1. Remove the two screws, one on each lamp base, and slide the assembly rearward.
  2.  
  3. Disconnect the electrical connector and remove the assembly.
  4.  
  5. Remove the two screws on the outside edges of the assembly.
  6.  
  7. Separate and remove the bulb.
  8.  
  9. Installation is the reverse of removal.
  10.  

WAGON
  1. Remove the two screws in the lens.
  2.  
  3. Remove the lens and remove the bulb from the socket.
  4.  
  5. Installation is the reverse of removal.
  6.  

Dome Light
  1. Remove the dome light cover.
  2.  
  3. Remove the bulb.
  4.  
  5. Installation is the reverse of removal.
  6.  

Passenger Area Lamps

To replace the courtesy and glove box lamps, simply remove the bulb through the access hole. To replace the ashtray lamp, it is necessary to remove the ashtray and the ashtray retainer first.

License Plate Lights

See Figures 8, 9 and 10

  1. Remove the lamp attaching bolts or screws.
  2.  
  3. Remove the lamp socket then remove the bulb.
  4.  
  5. Installation is the reverse of removal.
  6.  



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Fig. Fig. 8: Remove the attaching screws. Soaking the screws with penetrating oil first will make their removal easier



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Fig. Fig. 9: Remove the socket from the lens



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Fig. Fig. 10: The bulb on this model can be removed by simply pulling it from it's socket

 
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