Onyx Black 2012 GMC Sierra 2500HD SLE 4WD 6-Speed Automatic HD Electronic with Overdrive Tax, Title and Tags not included in vehicle prices shown and must be paid by the purchaser. While great effort is made to ensure the accuracy of the information on this site, errors do occur so please verify information with a customer service rep. This is easily done by calling us at (314) 894-2311or by visiting us at the dealership. Admin Fee: $593.00 applicable on all purchases. Vortec 6.0L V8 SFI Flex Fuel VVT Reviews: * Impressive hauling and towing capabilities; refined and quiet ride; solid build quality; responsive steering; comfortable seats. Source: Edmunds * If youre a GMC loyalist, the 2012 GMC Sierra HD truck line is bound to keep you coming back for more. Those who worry about dirtying up the inside of their truck will appreciate the heavily vinyl trappings of the Work Truck line. Source: KBB.com