Re: h2 transfer case
Per my powertrain charts, Tahoes offered:
BW4482, two-speed, full-time, 4-WD system (exactly what PhilD has stated previously)
BW4481, one-speed full-time AWD system,
NVG 246, two-speed automatic active system.
(NOTE: Tahoes prior to 2003 were equipped with NVG t/cases only.)
The H2 uses the BW 4484, two-speed, full-time 4-WD system.
As for the New Venture T/cases used on the trailblazers (NVG 226), not sure where you have heard they are stronger than either of the above BWs. Possibly you are thinking of the bigger NVG T/cases such as the 263 and 261 which are used on some of the HD pickup trucks mated with the 8.1L and the 6.6L Duramax engines.
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