I've had my new truck for a month and last week I turned on the AC. I was surprised how noisy the AC is when the truck is stopped and idling or moving slowly in traffic. It was so annoying I would turn it off and on in slow traffic. It's not a super loud noise, but just a constant whine. When I first turn it on it's not too bad, but after a minute it starts. I came from a Ford Ranger and the AC was quiet compared to this truck. Is this normal?