I have a 2015, 2500 Silverado with 151k miles on it. Twice in the last two days I've heard a random clicking noise, sounds like a relay coming from near the steering column in the dash. First time it happened after a few minutes of driving, and today it happened after about 10 minutes. It's like 3 or 4 random clicks. Any ideas where to start looking? As far as I can tell nothing is not working.