Have you checked the rear end fluid yet? Before jumping to a new rear, I would at least see how the fluid is in the rear end.
It is on the driver side on the frame under the Tahoe
You don't. The Chevrolet Tahoe does not have a timing belt. It has a chain which requires no scheduled replacement.
Chevrolet Tahoe was created in 1992.
I have a 97 Tahoe and it takes 5 quarts. That should be the same for you.
The 2003 Chevrolet Tahoe has 16 valves.
The 2012 Chevrolet Tahoe has 16 valves.
The 2002 Chevrolet Tahoe has a V8 engine.
The 2013 Chevrolet Tahoe has a V8 engine.
The 2002 Chevrolet Tahoe has 16 valves.
The 2005 Chevrolet Tahoe has a V8 engine.
The 2006 Chevrolet Tahoe has a V8 engine.
The 2012 Chevrolet Tahoe has a V8 engine.