[countrypuppy4865]

If this is an 07 model new body style, it could very well be a lifter problem. If it is an 07 it should have active fuel management which disables 4 cylinders to supposedly decrease fuel consumption. These lifters are prone to failing and causing problems. Eventually, it will result in camshaft wear. If it is not a new body style 07, then it would more than likely be a lifter issue. If the noise is mainly when it's cold, it is very likely that a lifter is just getting weak and it bleeds down when sitting.