GM Service Manual Online
For 1990-2009 cars only
  1. Turn the steering wheel to the straight-ahead position.
  2. Turn the ignition switch to LOCK and remove the key.
  3. Remove the air bag fuse F2 in the I/P fuse block and wait more than 1 minute for the SIR capacitor to discharge.
  4. Refer to SIR Disabling and Enabling for proper zone disabling and enabling.