GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 Sonoma Pickup - 4WD 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Daytime Running Lamp (DRL) Diode Replacement

Removal Procedure

    Object Number: 378738 Size: SH

    Important: Ensure that the headlamp switch is OFF and that the ignition switch is in the LOCK position.

  1. Open the hood.
  2. Remove the protective cover from the underhood fuse block.
  3. Remove the diode. Refer to

    DRL Diode (CKT 992 and CKT 592)
    Object Number: 357886 Size: LF
    in Lighting Systems Component Views.

Installation Procedure

    Object Number: 378738 Size: SH
  1. Insert the diode. Refer to

    DRL Diode (CKT 992 and CKT 592)
    Object Number: 357886 Size: LF
    in Lighting Systems Component Views.
  2. Install the protective cover to the underhood fuse block.
  3. Close the hood.