1998 Tahoe 5.7 will crank and run maybe 2 miles then start to miss real bad. turn key off wait 30 seconds and cranks up fine. It may run 1 mile are 3 miles before it start to miss and will dies it feels like it is running out of gas. Change plugs fuel filter, crankshaft position sensor fuel pump. And a few more things. OB ll shows #3 plug change gas cap also the gas gage goes from 3/4 to full. What numbers have to match on a used computer with the one that is on Tahoe the service number Need help please