Unless you can sustantiate your claim with something other than hearsay..That is not even close to being true..In all the car's documents it says nothing of the sort...I called the dealer and they said they add additive to all GM fuel systems all the time..GM sells a fuel system cleaner..

Listen..there are a couple GM/Hummer servicedudes on this board, they will be able to settle this

 

Thats exactly why I brought it up.
Listen..there are a couple GM/Hummer servicedudes on this board, they will be able to settle this

Maybe someone else knows better than me.

 

I've never heard of a car breaking down because of a fuel additive.

 

I'm pretty sure if you added the Kaleco Engine Scrub you'd be hearing about it.