GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1926984  Size: SH
  1. Remove the underhood bussed electrical center (UBEC). Refer to Underhood Electrical Center or Junction Block Replacement .
  2. Remove the body wiring harness (1) /engine wiring harness (2) electrical connection clip from the UBEC bracket.

  3. Object Number: 1926986  Size: SH
  4. Remove the UBEC bracket bolt (1) and nuts (3).
  5. Remove the UBEC bracket (2) and reposition out of the way.

  6. Object Number: 1860397  Size: SH
  7. Disconnect the engine wiring harness electrical connector(s) (1) from the ignition coil(s) (4).

  8. Object Number: 860797  Size: SH
  9. Remove the ignition coil bolt(s).
  10. Remove the ignition coil(s).

Installation Procedure


    Object Number: 860797  Size: SH
  1. Install the ignition coil(s).
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the ignition coil bolt(s).
  4. Tighten
    Tighten the bolt(s) to 10 N·m (89 lb in).


    Object Number: 1860397  Size: SH
  5. Connect the engine wiring harness electrical connector(s) (1) to the ignition coil(s) (4).

  6. Object Number: 1926986  Size: SH
  7. Position and install the UBEC bracket (2).
  8. Install the UBEC bracket bolt (1) and nuts (3).
  9. Tighten
    Tighten the bolt/nuts to 10 N·m (89 lb in).


    Object Number: 1926984  Size: SH
  10. Install the body wiring harness (1) /engine wiring harness (2) electrical connection clip to the UBEC bracket.
  11. Install the UBEC. Refer to Underhood Electrical Center or Junction Block Replacement .