Check Light, Check Truck
If the batteries are dead or the check engine light is on, take it to a dealership for inspection. I’ve seen a lot of people finance trucks with the promise they are perfect when they are not. Or the oil pressure gauge moved closer to the oil filter on a Chevy so the gauge stays in the normal range, but you’re losing the pressure near the lifters. Almost any small lower-end engine knock can be covered up with enough Lucas.