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

Neutral Safety/Backup Switch

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See Figure 1

1977 and later full size Buick, Olds and Pontiac vehicles do not have a neutral safety switch. Instead, these vehicles have a mechanical interlock between the lock and the transmission selector, which is nonadjustable.

REMOVAL & INSTALLATION

  1. Remove any trim panels which may interfere with the switch removal.
  2.  
  3. Remove the switch attaching screws and disconnect the electrical connector.
  4.  
  5. Remove the switch.
  6.  

To install:
  1. Place the shift lever in NEUTRAL .
  2.  
  3. Mount the switch but do not tighten the screws. Reconnect the electrical connector.
  4.  
  5. Move the switch until you can insert a gauge pin, 0.092 in. (2.33mm), for 1975-76, into the hole in the switch and through to the alignment hole.
  6.  
  7. Tighten the screws and remove the pin.
  8.  
  9. Step on the brake pedal and check to see that the engine will only start in NEUTRAL or PARK .
  10.  



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Fig. Fig. 1: Neutral safety/backup switch adjustment

 
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