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

Tiny
SUBURBANLS
  • MEMBER
  • 2001 CHEVROLET SUBURBAN
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 165,000 MILES
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
Sunday, August 31st, 2014 AT 3:06 PM

5 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
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.
Was this
answer
helpful?
Yes
No
Sunday, August 31st, 2014 AT 4:36 PM
Tiny
SUBURBANLS
  • MEMBER
  • 2 POSTS
Thank you, Saturntech9, sounds like a good direction to look. Best, SuburbanLS
Was this
answer
helpful?
Yes
No
Monday, September 1st, 2014 AT 6:10 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Your welcome glad I could help.
Was this
answer
helpful?
Yes
No
Monday, September 1st, 2014 AT 6:32 PM
Tiny
SUBURBANLS
  • MEMBER
  • 2 POSTS
You were right, Saturntech9, it was the fuel pump. Thanks, SuburbanLS
Was this
answer
helpful?
Yes
No
Thursday, September 4th, 2014 AT 6:54 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
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.
Was this
answer
helpful?
Yes
No
Thursday, September 4th, 2014 AT 9:22 PM

Please login or register to post a reply.

Sponsored links