I have a 94 Suburban Silverado K1500 5.7L 4WD...I have been having problems with my fuel pump, so I think. I replaced it myself in Jan 06 and then again in May 06 by a machanic. He took my receipt and fuel pump back to Schucks because it was under warranty and repalced it and the filter and cleaned the injectors. 5 months later it is doing the same thing, which is it hesitates or acts/sounds like it isn't getting any fuel while I am doing 5 to 25mph. Do these need to to have a fuel pump from the dealership instead of an aftermarket rebuild you get at the local parts store? I had a Dodge that was that way after putting in 3 fuel pumps! can anybody out there give me any ideas. Thanks