GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 Sonoma Pickup - 2WD 🢒 Body and Accessories 🢒 Horns 🢒 Horns System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

Press the steering column horn switch.
    • The relay clicks.
    • The horn sounds.
    •  Horns Inoperative
    •  Horns Always On

2
  1. If equipped, press the RKE transmitter LOCK button twice.
  2. Press the PANIC button on the RKE transmitter.
    • The relay clicks.
    • The horn sounds.
    •  Horns Inoperative

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.