Injection Pump and FSD

[M. Grogan]

(formerly grog01)

I have a 99 4 door open top with a 2003 6.5 TD & 65,000 miles on it. It is not a daily driver. Problem: It first started stalling on me at random times that did not form a pattern. Then it would occasionally not start. It would turn over fine but it acted as if it was out of fuel...it was not. Just about the time AAA shows up it starts fine. It happened 3 times in one day before I could get it to a GM Dealer (unfortunately non Hummer). They originally diagnosed it as a problem with the optic sensor in the injection pump. They told me that I needed to replace the entire pump assembly. They tell me that it shot out a code of p0251.

I remembered seeing the article that Chuck had written on this same issue at Flash Offroad which was extremely helpful. Has anyone else had the same scenario? Regardless, from what I know now, I will relocate the FSD to a cooler spot with the kit but do you really think the pump needs to be replaced or is this just another carbon copy FSD failure?

I'm asking because it's over $1500 more to replace the pump than just the fsd.

Thanks in advance.