GM Service Manual Online
For 1990-2009 cars only
Figure 1:

L26


Object Number: 1888843  Size: FS
Master Electrical Component List
Automatic Transmission Shift Lock Control Description and Operation L26/L32/3.6L
Control Module References
Shift Lock Control LS4
Figure 2:

LS4


Object Number: 1888845  Size: FS
Master Electrical Component List
Automatic Transmission Shift Lock Control Description and Operation LS4/5.3L
Control Module References
Shift Lock Control