Well he cleaned up the battery cable ends and said he got it started. Then all of the lights came on in the dash (CEL, Brake, ABS, etc.). It ran, so he drove it to the dealer about ten miles away. He said it ran fine other than the glow of all those lights. The dealer called him and said that the ABS module needed to be replaced? Its there right now being fixed, for what sounds like a small amount ($400 in parts, a couple hours labor).
I know these trucks have like 11 separate computer modules that work as a "team", but I find it hard to believe that these issues are related. When I see him for fathers day, I'll look over the invoice. Seems odd to me.