It's no longer listed as a feature on the current Mountaineer line-up... not that I could find. 
http://www.keystonerv.com/mountaineer/#/features
Terri, the Chevy co-pilot
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'06 Chevy 2500HD 6.6L Duramax/Allison 4x4 CC SB
2010 Laredo 265RL {SOLD}
Reese 15K Pro-series (manual slide)
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