Hi
My tahoe today lose the reverse and foward, start to shift over 2500 rpm.
does somebody know what happend and if is expencive to repair?
thank a lot
Andre.

 

Most anytime you deal with an automatic transmission it's going to be expensive. As for what went wrong you can't really tell without driving the vehicle oro maybe even tearing it down.

About all you can probly do is check to see if the fluid is full. Other than that plan on taking it to a dealership(recomended) or a transmission shop.