*Glockner Discount includes $1,000 Trade-in Assistance and $1,000 Finance Assistance. Contact dealer for details.
Meet the 2026 GMC Sierra 2500HD AT4X a powerhouse designed for those who demand capability and refined comfort. This crew cab standard bed combines a robust 6.6L V8 engine with a 10-speed automatic transmission and 4WD to handle any terrain, while its striking red exterior and premium Obsidian Rush leather interior deliver commanding presence and luxury.
- Bose Premium 12-Speaker audio system with SiriusXM and GMC Infotainment
- Off-road suspension with 2-speed active transfer case and hill descent control
- Heated and ventilated leather seats with 16-way power driver adjustment
- Advanced safety: automatic emergency braking, lane departure warning, trailer side blind zone alert
- 15 multicolor head-up display with wireless phone projection
- HD surround vision and bed view camera with trailer provisions
- 18 machined aluminum wheels with power sunroof
This Sierra AT4X delivers the performance and technology you expect from GMC's most capable lineup. Visit us today to experience its commanding drive and premium features firsthand.

