Silverado 5.3 transfercase

What's the transfercase that should b in a 1999 1500 Silverado 5.3 mine had a tag that said np246 got another one says 246 gm is their a difference

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On Sun, 29 Mar 2015 15:18:01 +0000, Q

New Process makes the transfer cases for gm , so its the same.
Cheers
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