24 Tahoe 6.2L - Flashing Engine Light

[FrankG158]

I was driving my Tahoe today and the engine light started flashing. I live in the mountains so it was our normal climb home to about 2k ft. Ambient temp was 110. The light stopped flashing almost immediately. This happened once before on another very hot day except that time it included traction control and another light. What is going on and is it serious? 4200 miles.

 

[Denali4181]

Get it to the dealer. With the lights coming on it should have stored some data for them to see.

 

[OR VietVet]

1. Look at owner's manual

2. Go to dealer and tell them the exact same story in chronological order.

It's a shame your second post was about this.

 

[Doubeleive]

I was driving my Tahoe today and the engine light started flashing. I live in the mountains so it was our normal climb home to about 2k ft. Ambient temp was 110. The light stopped flashing almost immediately. This happened once before on another very hot day except that time it included traction control and another light. What is going on and is it serious? 4200 miles.

flashing check engine light generally indicates a misfire is happening, so ya take it to the dealer, could be something simple
btw it can go to ANY gm dealer nation wide, doesn't have to go to the purchasing dealer

 

[Steveo123]

My 22 6.2 been doing this for awhile. Light flashes for maybe 30 seconds at most then goes away. I’ll pull out my cheap scanner and it always comes back as a misfire on cylinder 3. I actually just picked my Tahoe up from the dealer today for an oil leak and had them check for the misfire codes also. They can’t or won’t do anything unless they get the light to set while in their possession. But they do see the misfires in the history. My warranty is up in a few months and I really don’t know what to do.

 

[OR VietVet]

My 22 6.2 been doing this for awhile. Light flashes for maybe 30 seconds at most then goes away. I’ll pull out my cheap scanner and it always comes back as a misfire on cylinder 3. I actually just picked my Tahoe up from the dealer today for an oil leak and had them check for the misfire codes also. They can’t or won’t do anything unless they get the light to set while in their possession. But they do see the misfires in the history. My warranty is up in a few months and I really don’t know what to do.

Hopefully the info you just shared about codes and history is documented on paperwork the dealer gave you. If not, GET IT! Then ask to speak to the service manager and then the district manager and then......

 

[Doubeleive]

My 22 6.2 been doing this for awhile. Light flashes for maybe 30 seconds at most then goes away. I’ll pull out my cheap scanner and it always comes back as a misfire on cylinder 3. I actually just picked my Tahoe up from the dealer today for an oil leak and had them check for the misfire codes also. They can’t or won’t do anything unless they get the light to set while in their possession. But they do see the misfires in the history. My warranty is up in a few months and I really don’t know what to do.

sounds like bs but.... optionally you can ask and PAY out of pocket for a diagnostic, usually it should take them no more than 1 to 2 hours to find the cause of the misfire.
that get's you somewhere anyway, then the warranty portion would kick in and then you can go to the owner/head manager and plead your case for the diagnostic fee.

 

[Sean Michael]

Did you ever look further into your check engine light flashing? My 2024 6.2 Tahoe also flashed the check engine light today.

 

[GMCnewbee]

Are you running the high octane fuel in it?