2002 Oldsmobile Alero GLS help?
Geo
You apparently did something to the Shift Interlock. Make sure you press firmly on the brake before you shift. If that doesn't work look up Shift Interlock Troubleshooting for your car. There may be something particular to that car that causes that. But on all car a faulty Brake Switch can cause that.
WB
I don't think you ruined it, but it probably needs adjustment. You should be able to read the manual on AutoZone's website. It's free to sign up and read your manual. Good luck.
thebax2006
Take it back apart and check the wiring running to the shift lever lock out solenoid. GM didn't make the wiring harness long enough and I've had 2 Pontiac's that had a broken wire at the solenoid.
Anonymous
Check your installation again and check if the wires to the shift interlock solenoid is being pinched.