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Shut off while driving

Tiny
ICE9667
  • MEMBER
  • 1995 GMC SIERRA
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 2,000 MILES
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?
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Thursday, January 27th, 2022 AT 5:09 PM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,269 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
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Friday, January 28th, 2022 AT 6:54 PM
Tiny
ICE9667
  • MEMBER
  • 2 POSTS
Thanks I will try that.
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Saturday, January 29th, 2022 AT 10:27 AM

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