10/15/2026
Just arrived ’21 GMC Sierra AT4 3.0L Duramax!
125,000 km across 2,763 engine hours = a 45 km/h lifetime average. Open highway kms, not idling. Loaded with the Tech Package (HUD, Rear Camera Mirror, 360° Cam), sunroof, and heated/cooled leather, memory seats.
Off-road capability meets 11.3 L/100 km diesel economy.
Check it out at Boyer GM in Ajax!