GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1998 🢒 Park Avenue 🢒 Steering 🢒 Steering Wheel and Column - Tilt 🢒 Shift Lock Control Schematics
Figure 1:

Cell 138: Brake Transaxle Shift Interlock (BTSI)
Object Number: 452603 Size: FS
Tilt Wheel/Column Components
Automatic Transmission Shift Lock Control Circuit Description
Cell 138: Park Neutral Position Switch
Handling ESD Sensitive Parts Notice
Handling ESD Sensitive Parts Notice
Lighting Systems Connector End Views
Cell 14: G202 (3 of 4)
Tilt Wheel/Column Connector End Views
Body Control System Connector End Views
Cell 50: Class 2 Serial Data Line
Figure 2:

Cell 138: Park Neutral Position Switch
Object Number: 452673 Size: FS
Tilt Wheel/Column Components
Automatic Transmission Shift Lock Control Circuit Description
Handling ESD Sensitive Parts Notice
Cell 138: Brake Transaxle Shift Interlock (BTSI)
Cell 50: Class 2 Serial Data Line
Cell 14: G100, G101, G102 and G103
Powertrain Control Module Connector End Views
Automatic Transmission Inline Harness Connector End View