UPDATE 97 GMC Suburban Died UPDATE Here is what I found: I replaced the fuel filter. added HEET gasoline additive for possible h20 contamination, and tested. This did not fix the problem. I went back to O'Reilly's and purchased a new fuel pump and screen. After a massive struggle to remove the pump assembly from the tank, I replaced the pump, and screen. This process took much longer than it should have because of the odd way the pump assm is attached to the tank. I sat in the drivers seat thinking how the next few seconds was going to determine if I had to spend a fortune on a drive chain replacement, or would I be lucky and the Suburban would fire right up.... Moments later, I turned the key and a massive roar came from under the hood... the engine fired up with a more than normal very powerful sound, success! I then toke the Suburban out on the freeway and stressed out my passenger as we soared past 80 like it was a stop sign. Total cost: $225.00 $100.00 was for towing. Parts: $125.00 Apparently I had not realized that the engine had been suffering for fuel for some time. Engine performance was way down and I didn't realize it. Now, the Suburban runs like new, and I am not joking. OReilly's tried hard to sell me a fuel pressure gauge which cost 75 percent of the fuel pump. To verify the pressure, that tool would be a nice thing to have. But the engine was obviously not getting fuel, and the pump, filter and regulator are your primary suspects. And, since this is a 15 year old truck, replacing any and all of these is just simple maintenance anyway. Thanks to all for your great help. I greatly appreciate it.