CHEVROLET SUBURBAN COMPUTER REPLACE/REMOVE

Driving Down The High Way At 65-70 When The Car Just Shut Off. Instrument Lights Were On. I Pulled Over, Pulled The Plug Wire Off To Check...

How Can I Test My Ecm I Think Its Bad 1991 Chevy Suburban R1500 5.7 L Tbi I Have Changed The Entire Fuel System And It Still Keep Dieing.I...