Car shuts off after driving a while?

Tiny
DAD'SENVOY
  • MEMBER
  • 2006 GMC ENVOY
  • 3.8L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 139,206 MILES
Car shuts off after driving about an hour, does register as hot.
Monday, September 1st, 2025 AT 4:24 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Hi,

Is the engine overheating? That can cause it to shut down if it is hot enough. When it does stall, does it start right back up?

First, make sure the engine coolant is full. Also, pay attention to see if the radiator cooling fan is running when it gets hot.

Next, an engine stalling and then restarting when it cools can be an indication of a faulty crankshaft position sensor. However, I think we need to focus on the engine registering hot. Check the coolant level first and let me know what is found. Also, and don't laugh, see if the heater works properly. If there is no heat, suspect low coolant.

Additionally, take a look at this link. It describes common symptoms of a failing crankshaft position sensor. See if this mirrors what you experience.

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

Let us know what you find or if you have other questions.

Take care,

Joe
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Tuesday, September 2nd, 2025 AT 7:43 PM
Tiny
DAD'SENVOY
  • MEMBER
  • 4 POSTS
Computer says can not connect to the EPM
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Wednesday, September 10th, 2025 AT 12:25 PM
Tiny
DAD'SENVOY
  • MEMBER
  • 4 POSTS
Also the FIRST message is wrong. It is NOT running hot or overheating.
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Wednesday, September 10th, 2025 AT 2:40 PM
Tiny
DAD'SENVOY
  • MEMBER
  • 4 POSTS
Replaced the crankshaft position sensor and it is still shutting down
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Friday, September 12th, 2025 AT 4:34 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,243 POSTS
To me is sounds like a fuel pump is going out, when it does not start I would try starting fluid to help confirm the problem is fuel related. Here is a video that can help.

https://www.youtube.com/watch?v=lXLJbuAZ4CE&t

Please upload pictures or videos in your response

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Sunday, September 14th, 2025 AT 10:24 AM

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