Well, I was thoroughly prepared for the install and it went as planned. Got into the dash, unplugged the Onstar unit, plugged in the Costar and I was done! Unfortunately the unit would not wake up on a recurring basis. When it worked, it was great, but sometimes (daily) it would simply not come out of sleep mode to sync up. Chris from Costar was very helpful, but after sending the unit to him, it checked out fine on his bench. He promptly refunded my cost, but I was disappointed to learn it wasn't compatible with my truck. Great idea, but I must have something odd on my truck to reject it...but it's all stock? Oh well, worth the shot.
