For Allen re. new truck

mjbrown · Jul 24, 2015

I haven't been where I could post this. We have an '07 Chevy with the Duramax Allison combo at work. The truck has had problems when it's towing on the interstate of going into limp mode without warning. It's as if someone reached over and turned the key off in the center lane at 70. This is a pucker inducing experience. It will then limp along at 25 while I franticly work my way to the shoulder. Turning it off for 5 or 10 minutes seems to fix it for a while and after a couple of times it seems to run just fine. Our diesel truck guy has seen this before and explained that the high pressure fuel pump sucks fuel from the tank through the filter and if the filter isn't nearly perfect it can't pull quite enough through when demand is greatest. The computer senses a low fuel pressure reading and shuts it down He suggested a lift pump at the tank with 2 filters which we have installed now. We haven't made any trips with it yet so I can't say if it is the cure. Just sharing.

Ferd · Jul 24, 2015

The same thing happened on the diesel truck that I owned and it turned out to be the fuel module was bad. They said that if the battery runs low it'll take the fuel module out and the battery's had just given out right before it happened.

mjbrown · Jul 24, 2015

Did replacing it fix your problem?

For Allen re. new truck

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