One problem related to battery cable has been reported for the 2008 GMC Yukon. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 GMC Yukon based on all problems reported for the 2008 Yukon.
Purchased a used 2008 GMC Yukon Jan. 23, 2010 and approximately 4 months later the first issue occurred with the car not starting in my driveway. I thought it was user error. A few months later coming out of the grocery store went to enter my vehicle and no start, went under the hood and moved the battery cable and it started. Later that night I tried to tighten the battery cable, but it wasn't loose. Approximately 1 month later while driving, the dash flickered and "stability traction" light illuminated with slight loss of power. Got to destination exited vehicle and upon return vehicle would not start until I once again moved battery cable around. The last incident which occurred on August 30, 2010 while driving approx. 15 mph through a residential neighborhood, engine just cut off. Wrestled car to side, put in park and restarted. This was the scariest incident because someone could have rear ended me. I took vehicle to shop GMC dealer and they found nothing wrong. 23,000 miles on vehicle now. Purchased with 17,500.