6.5 diesel (injection pump controller)
I've had a 1999 GMC K2500 with the turbo diesel for nearly a year now. The previous owner warned me about the injection pump controller problems. However, he also said that at least some of the problems were due to poor placement of the controller: right on top of the water pump which gets pretty hot. He moved the pump to the firewall.
I thought he was pretty clever and had cured the problem until symptoms that appeared to be injection pump controller failure occurred first during a recent PA - FL trip. Then it happened again several times since over the past month. The symptom is that the engine just stops entirely, but will re-start almost right away after letting it cool off for a minute so.
So one of the times it happened last weekend, I went ahead and replaced the controller with a new one that the previous owner had left for me in the glove compartment. However, the symtoms recurred almost immediately after installing the new one, so that obviously was not the real problem this time.
So, this is probably a much longer answer than you were looking for, and if anyone has read this far, maybe they can suggest a next step for diagnosing my diesel engine problem. My best guess is that the relocation of the injector controller has indeed fixed the controller overheating problem and that the remaining problem is due to either fuel quality, filter, or lift pump problems, or maybe (but hopefully not) a problem with the injector pump itself.
I'll let you know what I find (if anyone is interested).
Philip