Shut off while driving

1995 GMC SIERRA
2,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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ICE9667
  • MEMBER
  • 2 POSTS
Basically, the truck is all new under hood. Drove the truck for about fifty miles or so and it just lost power and then shut down. Immediately I tried to crank while pulled on side of highway several times, no start. Sat about 15 minutes started right up drove home. Any suggestions?
Jan 27, 2022 at 9:09 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
Hi,

Based on the description, it sounds like a faulty crankshaft position sensor. When they begin to fail, heat adversely affects them. As a result, the engine can shut down due to loss of spark. After it cools a bit, it works again.

Do me a favor. Take a look through this link and let me know if it seems to mirror what you experienced:

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

If it happens again, check to see if you lost spark to the spark plugs. Here is a link that shows how to check:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Let me know your thoughts on what I mentioned. Also, let me know if you have other questions.

Take care,

Joe
Jan 28, 2022 at 10:54 AM
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ICE9667
  • MEMBER
  • 2 POSTS
Thanks I will try that.
Jan 29, 2022 at 2:27 AM
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