I am trying to figure out what is going on. For a while now I have been hearing some clicking ticking noises from underneath the truck 2010 crew cab Silverado. The clicking and ticking are random and it also does this when changing gear from P to D to R. I first noticed this when sitting at a drive threw when moving slowly in D. Planning on taking to the dealership but it will be a week before they can look at it. I though I would post up here in hopes this is something simple I am overlooking. Again it is a clicking ticking type nois almost similar to a exhaust leak or electrical click like a solenoid. But it sounds like it is coming from the transmission pan area. Please help.