NHTSA opens preliminary probe into more than 870,000 GM vehicles

[jfoj]

Well you have started out much better than most owners. Get the 0W20 out and drive around town in L9 for now. You could drive in L9 on the highway if you wanted to give up some fuel economy.

The next thing I need to check and see if Trailer or Sport mode shuts down DFM??

 

[blanchard7684]

@blanchard7684 2024 Tahoe RST 6.2L purchased new last September.​

Dang I thought the 2024 had the new module part number 13554821 that was the improved part…

 

[Scarey]

I think it has been shown on various threads sport/tow does not shutdown Dfm.

 

[Sean Michael]

Dang I thought the 2024 had the new module part number 13554821 that was the improved part…

And to be specific, it was assembled late August 2024, so it hadn't sat on the lot, I bought it right off the transport truck.

 

[jfoj]

My 2024 was an August 2024 build with the engine build date of July 15, 2024.

My spare fuel pump modules are the 4821 units, I do not think I checked the part number of the original yet