GM Inside News Forum - View Single Post - 8.1L & 4L80E/4-L85E Transmission

MarkSS · 12-21-2003, 05:04 PM

The 8100/heavy duty 4 speed auto is also available in Avalanches. I am not sure why it is not available on Silverado, but I bet is has something to do with trailering capacity.

12-21-2003, 05:04 PM	#2 (permalink)
MarkSS 2.4 Liter SIDI ECOTEC Join Date: Jan 2003 Posts: 162	The 8100/heavy duty 4 speed auto is also available in Avalanches. I am not sure why it is not available on Silverado, but I bet is has something to do with trailering capacity.