1995 GMC Yukon • 200,000 miles

Cant get the 4x4 low range to engauge put in 4x4 low the truck moves bout 10 feet and them the enging revs ( acts as if the transmission is slipping) and truck stops moving. Put as soon as I put in 4x4 hi range ( or 2 wheel hi ) the truck works fine tried this several times with the same result each time 4x4 hi and 2x4 hi works fine 4x4 low truck wont move more than 10 feet b 4 stopping
September 19, 2011.

Check the actuator on the transfer case. It sounds like it isn't fully engaging.