When its cold I like to slowly drag lures on the bottom. My go to would be a senko or a jig. Another producer is is a large kietech fat swing impact swimbait on a jig head. Just bottom roll it slow enough that the tail kicks and you are occasionally hitting rocks.
Those are low miles, you may want to find out why it hasnt been driven much. At a minimum take it to a mechanic for a compression or leak down test (my preference) to make sure the head job was a good one. Also the 3.0 is a little sluggish which can be annoying when going over mountain grades...