Car shuts off after driving a while?

2006 GMC ENVOY
139,206 MILES • 3.8L • 6 CYL • 4WD • AUTOMATIC
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DAD'SENVOY
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Car shuts off after driving about an hour , does register as hot .
Sep 1, 2025 at 4:24 PM
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JACOBANDNICKOLAS
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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
Sep 2, 2025 at 7:43 PM
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DAD'SENVOY
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Computer says can not connect to the EPM
Sep 10, 2025 at 12:25 PM
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DAD'SENVOY
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Also the FIRST message is wrong.. It is NOT running hot or overheating.
Sep 10, 2025 at 2:40 PM
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DAD'SENVOY
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Replaced the crankshaft position sensor and it is still shutting down
Sep 12, 2025 at 4:34 PM
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STRAILER
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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


Sep 14, 2025 at 10:24 AM