- New 2010 GMC Sierra 2500HD VIN 1GT3KZBGXAF135569 from O Connor Motors by EveryCarListed.com You must see this 2010 GMC Sierra 2500HD WT that we just got into, O Connor Motors. This Sierra 2500HD has a 6.0 liter 8 cylinder 16 valve engine and a 6-Speed Automatic that are ready to haul up to 3594 pounds. It comes with an AMFM Stereo and gives you peace of mind with its safety features, including 4-Wheel ABS and more. We would love to put you in the driver's seat of this Sierra 2500HD. Please contact us for more information.