Super appreciates this video my dude.. I have a GMC as well and I've been hearing a stupid chime anytime my oil pressure sensor decides to have sludge near it and the drive gets annoying if it wasn't for having my music loud. I've been looking everywhere trying to find somebody who's just as annoyed as i am and I finally found somebody after so long of this bullspit sound! Wish me luck. If this works, you'll see me back here commenting. Mark my word.