Transmission swap

[Shawn420]

I was wondering if I can swap a transmission from a 1999 to my 2003 silverado 1500 4x4. Auto transmission

 

I lost 3rd gear a few days ago and found $300 transmission at a scrap yard. Just need to figure out if it will be compatible 

[carnau]

2003 Silverado 1500 4x4 Transmission:

Interchangeable Vehicles :

GMC Sierra 1500 4x4/2x4 - 1999 - 2006

GMC Yukon 1500 4x4/2x4 - 1999 - 2006

Chevrolet Silverado 1500 4x4/2x4 - 1999 - 2006

Chevrolet Tahoe 1500 4x4/2x4 - 1999 - 2006

Chevrolet Suburban 1500 4x4/2x4 - 1999 - 2006

Chevrolet Avalanche 1500 4x4/2x4 - 2001 - 2006