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

 

[blanchard7684]

Mine is the 13554821 with a September 24 build.

 

[Jayhawkeye3]

I’ve been following this because I’m in the market for a Hoe or Denali. Are the 2025 models impacted here too? Seems as if they are, which would give me serious pause and/or shift to the baby diesel.

 

[WalleyeMikeIII]

I’ve been following this because I’m in the market for a Hoe or Denali. Are the 2025 models impacted here too? Seems as if they are, which would give me serious pause and/or shift to the baby diesel.

Nobody really knows. Have yet to see a post about a 2025 engine blown, but, it’s early.

 

[Stbentoak]

Has anything materially changed for 25 that would say that "It's over with"? I don't believe so.....

 

[jfoj]

Article from The Car Connection

Seems to indicate that at least 346 reports have been filed with NHTSA. Assume this is less than 20% of actual failures?

A comment indicated that GM has until March 28th to provide requested information. Then NHTSA needs to digest all this info and decide if they need more data or what if anything they may request GM to do in order to address failures. We shall see what happens and when, I do not expect any solid info until Sept or later.

The Car Connection Article