GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 Envoy - 4WD 🢒 Preface 🢒 Cautions and Notices 🢒 Enabling the SIR System
  1. Remove the key from the ignition switch.

    2. Object Number: 208427 Size: SH
  2. Connect the passenger yellow 2-way connector located behind the glove box.
  3. Install the connector position assurance (CPA) to the passenger yellow 2-way connector located behind the glove box.
  4. Close the IP compartment door.

    5. Object Number: 9042 Size: SH
  5. Connect the driver yellow 2-way connector located at the base of the steering column.
  6. Install the connector position assurance (CPA) to the driver yellow 2-way connector located at the base of the steering column.
  7. Install the knee bolster, if equipped. Refer to Driver Knee Bolster Panel Replacement in Instrument Panel, Gauges and Console.
  8. Install the left sound insulator, if equipped. Refer to Closeout/Insulator Panel Replacement - Center in Instrument Panel, Gauges and Console.
  9. Install the SIR Fuse to the IP fuse block.
  10. Staying well away from both air bags, turn the ignition switch to the RUN position.
    11. 10.1. The AIR BAG warning lamp will flash 7 times.
    10.2. The AIR BAG warning lamp will then turn OFF.
  11. Perform the SIR Diagnostic System Check if the AIR BAG warning lamp does not operate as described.