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

[MCurtis762]

Before you throw parts at it, I would look into a data logger or bluetooth dongle and data logger app. Have your wife tell you the exact time it happens and see what the logger shows.

I would hesitate to replace any OEM part with something new (even OEM replacement). You could be introducing a whole new problem.

 

[bigt61]

How heavy is the keychain?

I had one ignition switch go bad from the weight hanging on it. Wouldn’t know it unless i rocked the keychain back and forth.

 

[testdepth]

How heavy is the keychain?

I had one ignition switch go bad from the weight hanging on it. Wouldn’t know it unless i rocked the keychain back and forth.

BWHAHA that's what I tell my wife about the 3lbs of crap she has on the key chain. Too funny someone else said it!

 

[savannahboy]

BWHAHA that's what I tell my wife about the 3lbs of crap she has on the key chain. Too funny someone else said it!

That's your problem! Probably why it doesn't fail with you. Keychain obesity is a switch killer.

 

[roundhouse]

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.

You also gotta flush out the tiny tube inside the block that goes to the sensor

 

[Gunanddoglover]

How heavy is the keychain?

I had one ignition switch go bad from the weight hanging on it. Wouldn’t know it unless i rocked the keychain back and forth.

I lost track of the number of ignition switches I changed on the ex's car due to keychain obesity.

 

[testdepth]

You also gotta flush out the tiny tube inside the block that goes to the sensor

Are you talking about the tiny filter under the oil pressure sensor?

 

[testdepth]

My wife and I just went to lunch and while I was driving this happened. Starting from a light and accelerating the truck starts chugging and rpms going up and down and acting like it was going to stall out. We turned around and came back home. No check engine or any other warnings indicated or DTCs.

 

[Wile E. Coyote 5.0]

My wife and I just went to lunch and while I was driving this happened. Starting from a light and accelerating the truck starts chugging and rpms going up and down and acting like it was going to stall out. We turned around and came back home. No check engine or any other warnings indicated or DTCs.

Mine went that way for months. My mechanic could never get it to replicate the issue when he was driving it until he drove it home one night. It was the MAF sensor the entire time. It would rev up and down and stall. Thing runs perfect now

 

[testdepth]

Mine went that way for months. My mechanic could never get it to replicate the issue when he was driving it until he drove it home one night. It was the MAF sensor the entire time. It would rev up and down and stall. Thing runs perfect now

I'm going to replace the MAF sensor along with the throttle body I already bought.