Truck went from working perfectly to unable to start in 1 second while traveling at 70 mph on the interstate.

2001 CHEVROLET SUBURBAN
165,000 MILES • 5.3L • V8 • 2WD • AUTOMATIC
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SUBURBANLS
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My very dependable 2001 Chevy Suburban LS with 165,000 miles was working perfectly on cruise control at 70 mph on the interstate going east from Houston toward Louisiana. Then, I noticed that I was losing speed, and I could see from the lights on the dash that the engine had shut off while the truck was still in gear. I coasted to a stop on the side of the interstate, shifted into park and tried to restart. I noticed that the engine turned over more rapidly than usual and would run very roughly for a second or two, but no longer. I had to get towed in to a Chevy dealer and am waiting to see what they find out after the Labor Day holiday. So what could make the truck just shut down like that without any warning? I am dying to hear your theories! Best, George Paul
Aug 31, 2014 at 3:06 PM
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SATURNTECH9
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Without knowing if it has codes fuel pressure etc I could only speculate whats wrong.sounds like a fuel issue if it was starting for a few seconds after it died.It could be the fuel pump failed because it was getting old.Also could be the crankshaft position sensor failed that can cause random dieing no starts etc.Without checking for codes testing for spark and actual fuel pressure etc one could only speculate as to what happened.
Aug 31, 2014 at 4:36 PM
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SUBURBANLS
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Thank you, Saturntech9, sounds like a good direction to look. Best, SuburbanLS
Sep 1, 2014 at 6:10 PM
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SATURNTECH9
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Your welcome glad I could help.
Sep 1, 2014 at 6:32 PM
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SUBURBANLS
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You were right, Saturntech9, it was the fuel pump. Thanks, SuburbanLS
Sep 4, 2014 at 6:54 PM
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SATURNTECH9
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Glad to hear you got it fixed and it wasnt a long drugged out process of finding the problem. Fuel pumps fail whenever they want without warning usually.
Sep 4, 2014 at 9:22 PM
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