Change you ABS speed sensor on the top of you rear axle diff housing. Napa should have the sensor for under $35. 00. Most of the time this fixes problem. I have had ALOT of these trucks do this and it has fixed every one. The lift pump is a good one... . I have heard of them going from 3,000- 300,000 miles. Best thing to do is get a fuel pressure gauge and monitor it. Be conscience of fuel filter and overflow valve. I got my truck and immediately replaced all three of those items and kept pump and overflow as spares. I change my filter every 8,000-10,000 miles. Hope this helps.