6L80 Transmission Rebuild

[89PWRRAM]

I'm near Texas City , Texas. This is what our local Snider trans shop quoted me for my 8.1ltr, 4x4 installed.........ESTIMATED COST FOR 2004 YUKON XL TRANS 2000-2600. APROX

 

[stocksj]

Can an 07 with a 4 speed be upgraded to the 6 speed transmission? Just asking since I don’t know.