2012 Yukon Denali with 6.2 engine. Truck stalled and shut off while driving. 169000 miles.

[prestige30165]

check the ground cables , My 2012 Silverado started doing the same thing and 1 of the ground cables was the culprit.
Sorry cannot remember which one it was. Fought this gremlin for a while till I figured out what is was

 

[testdepth]

I drove this truck until reaching normal engine temperature and it never shutoff on me once no matter which way I turned or how fast I was going. I intentionally jerked the steering wheel left and right to see if anything happened and nothing abnormal. I did notice while stopped in drive or park the RPM is sitting at between 500 and 600 and oil pressure shows 10 to 15 psi. Oil is full. I got it back home and scanned it again but no check engine or DTCs set. While at idle the engine appears to stumble a little bit but nothing major.

I'll check ground cables as suggested. I also bought new camshaft and crankshaft sensors as they are cheap to replace and this car is 13yrs old and they are original.

 

[Gunanddoglover]

I have a really good code reader. After doing a complete scan there is no check engine light or trouble code.

Truck shut off on my wife again today twice.

I'll pick the brain of our mechanic this morning.

 

[Gunanddoglover]

I drove this truck until reaching normal engine temperature and it never shutoff on me once no matter which way I turned or how fast I was going. I intentionally jerked the steering wheel left and right to see if anything happened and nothing abnormal. I did notice while stopped in drive or park the RPM is sitting at between 500 and 600 and oil pressure shows 10 to 15 psi. Oil is full. I got it back home and scanned it again but no check engine or DTCs set. While at idle the engine appears to stumble a little bit but nothing major.

I'll check ground cables as suggested. I also bought new camshaft and crankshaft sensors as they are cheap to replace and this car is 13yrs old and they are original.

I gave the information to our mechanic his first thought is to replace the crank sensor. The oil psi is a tough one. On of our guys has a 2500 that shows low oil psi at idle for the first 15 minutes after a cold start. Replacing the sensor made no difference.

 

[MCurtis762]

If you get new sensors, go OEM. But even that isn't a guarantee, quality on newer replacement parts is getting worse and worse.

If oil PSI was triggering it, your wife should get an alarm about it on the cluster display. And 10-15 at idle isn't awful for a high mileage motor.

If it starts right back up after it stalls, it sounds like an electrical gremlin. Does your scanner have a data logging function?

Any chance you can switch cars for a few days to see if happens to you?

 

[jamie1475]

may sound crazy but no generic or after market key been used lately? I had a key made at ACE once and used it in a pinch when wife had the key fob and it started a whole series of this happening.

 

[Mirvin 264]

Give ya tree fiddy for it..........

 

[testdepth]

I gave the information to our mechanic his first thought is to replace the crank sensor. The oil psi is a tough one. On of our guys has a 2500 that shows low oil psi at idle for the first 15 minutes after a cold start. Replacing the sensor made no difference.

Thank you very much for taking the time to help someone you never met. Very appreciated

 

[Gunanddoglover]

Thank you very much for taking the time to help someone you never met. Very appreciated

Send me a pm if you have any questions or need tech support.

 

[testdepth]

If you get new sensors, go OEM. But even that isn't a guarantee, quality on newer replacement parts is getting worse and worse.

If oil PSI was triggering it, your wife should get an alarm about it on the cluster display. And 10-15 at idle isn't awful for a high mileage motor.

If it starts right back up after it stalls, it sounds like an electrical gremlin. Does your scanner have a data logging function?

Any chance you can switch cars for a few days to see if happens to you?

Man I know my wife hates it because I drive her GMC and nothing happens to me. We drove it 30 miles round trip earlier to Navy Federal and nothing happend while I was driving it. Oil pressure while at normal temp sitting in drive at a light or stop sign RPM 600, 15psi oil pressure. 2012 Yukon Denali XL 6.2 engine with 170000 miles on it. No DTC, no check engine, no weird sounds or anything.

I'll replace the camshaft sensor, crank sensor, flush the engine, change the oil and filter. There is a possibility the oil pressure sensor is going bad. I had to replace it 4 or 5 years ago. My wife was driving it when the gauge randomly pegged to zero. She pulled over and it had plenty of oil so she drove it home. What fun that was changing the sensor and the damn little tiny filter screen under it (flex engine). Sensor is all the way back against the firewall and drop down 6 inches under a heat shield. Whoever at GMC that decided this was the only spot to place this sensor should be slapped with a 2x4.

Scanner I'm using is a bidirectional TOPDON ArtiDiag 900 Lite.