Used 2026 GMC Sierra HD for sale in Castle Rock
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Vehicle Details
Unknown
Unknown
4WD
Diesel
V-Shaped
Unknown
Pickup
Owners
What was with this car history VIN 1GT4UPEY3TF321867?
Popular features
Seller description
Discover the uncompromising power and capabilities of the 2026 GMC Sierra 2500HD AT4. This rugged and versatile pickup is engineered to conquer any terrain, with a Duramax 6.6L V8 Turbodiesel engine delivering an impressive 470 horsepower and 975 lb-ft of torque. - UPFITTER SWITCH KIT, (5) - LPO, ALL-WEATHER FLOOR LINERS, 1ST AND 2ND ROWS - ASSIST STEPS, POWER RETRACTABLE, BLACK - ENGINE BLOCK HEATER - ALTERNATOR, 220 AMP - HIGH IDLE SWITCH - GOOSENECK / 5TH WHEEL PREP PACKAGE The AT4 Premium Plus Package enhances your driving experience with premium features like a power sunroof, advanced technology, and high clearance steps for off-road adventures. Enjoy the convenience of wireless charging, the clarity of the Bose premium sound system, and the peace of mind of advanced safety technologies like Rear Cross Traffic Alert and Trailer Side Blind Zone Alert. Designed for the most demanding jobs and toughest terrain, the 2026 GMC Sierra 2500HD AT4 is the ultimate expression of power, capability, and refinement. Schedule a test drive today and experience the difference for yourself. Price includes: $1000 - Buick & GMC Consumer Cash Program. Exp. 06/30/2026 $500 - GM Military Cash Allowance Program. Exp. 01/04/2027 $903 Fuel Credit for Full Size Vehicle. See Dealer For Full Details. Expires 8/1/26.
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Frequently Asked Questions About the 2026 GMC Sierra HD
The average price of a used 2026 GMC Sierra HD is $69,222 based on 23,000 listings currently available nationwide. Prices range from $10,000 to $111,945 depending on mileage, condition, and location. This particular Sierra HD in Castle Rock, CO is listed at $83,022.
Used 2026 GMC Sierra HD vehicles on our marketplace have an average of 14,593 miles. You can compare mileage across all available units on the GMC Sierra HD listings page.
Reliability varies by model year, maintenance history, and driving conditions. We recommend checking the vehicle history report and having an independent inspection before purchase.
The 2026 GMC Sierra HD runs on Diesel. Exact fuel economy figures vary by trim level and driving conditions. Check fueleconomy.gov for EPA estimates specific to this model year.
There are 769,898 used Pickup vehicles priced under $100,000 currently listed on our marketplace. Browse all options on the Used Pickup under $100,000 page. You can also narrow your search to Used GMC vehicles under $100,000 if you prefer to stay with the GMC brand.
