Recent Arrival! 2023 GMC Sierra 2500HD AT4 4WD 10-Speed Automatic Duramax 6.6L V8 TurbodieselValue Market Pricing, 10-Speed Automatic, 4WD, Leather.Certified. GM Certified Details:* Exchange policy is 30 days or 2,500 kilometres, whichever comes first* Current students, recent graduates and full/part-time students eligible for $500 student bonus offer on the purchase of an eligible certified pre-owned vehicle.. Certified PRE-OWNED OFFERS FOR CANADIAN NEWCOMERS. To make Canada feel more like home, we're offering $500 off any eligible Certified Pre-Owned Chevrolet, Buick or GMC vehicle as a welcoming gift. Free 3-month SiriusXM Trial. 1-month OnStar Trial. GM Owner Centre and Mobile App* Finance rates from 4.99% APR FOR 24 MONTHS ON SELECT MODELS* 3 months or 5,000 kilometres (whichever comes first) which can be extended or upgraded to an even more comprehensive Certified Pre-Owned Vehicle Protection Plan* 24/7 roadside assistance for 3 months or 5,000 km (whichever comes first)* 150+ Point Inspection