this is a California truck, 1999 model, built in December '08, I took delivery in January '99. It doesn't have the 10/99 and later glow plug control module set-up, it's whatever system they were using in this early model first year super duty turbo diesel. The dealer quoted my mechanic $790 for the "glow plug monitor" or module or whatever. Both he and I are trying to determine just whatinhell is really going on, but we know for sure it isn't the harness to bank 2, we replaced it. So maybe 1 or more defective glow plugs in that bank? Or is it the "glow plug relay" which is a pretty cheap part? Or is there in fact a much rarer "glow plug monitor" peculiar to that production run of trucks? Hell, we don't know, but we're thinking there something odd about this price quote from the dealer. Neither of us have the factory service manual, and the TSB's I've seen apply to the 10/98 or later '99's...We should have checked the glow plug impedances when we had the valve cover off, but we we're hoping the harness was the problem, as apparently is most generally the case. Any suggestions? Neither my mechanic nor I place a lot of faith in the dealer's suggested "solution".