2018 GMC Sierra 2500HD

Listed by an independent dealer in Castle Rock, CO · On lot for 48 days · VIN verifiable at NHTSA

This used 2018 GMC Sierra 2500HD SLE is listed at $28,998 by an independent dealer in Castle Rock, CO 80104. It has 108,007 miles on the odometer. The exterior color is White. It features a 4WD drivetrain with a 6.0L V8 engine and Automatic transmission.

OAV's AI-powered Price-to-Market analysis rates this vehicle as Fair Price — priced at market value. Based on available similar vehicles in the Castle Rock market, the estimated market range is $28,998 to $28,998.

This vehicle has been on the lot for 48 days.

Analysis powered by OAV's patented inventory standardization technology (U.S. Patent No. 12,236,477).

How this deal is rated

OAV compares this 2018 GMC Sierra 2500HD against similar vehicles currently available in the local and regional market — same make, model, and year range, filtered for comparable mileage. Based on where this listing falls in that comparable set, it is rated:

• Great Deal — priced below the typical range for comparable vehicles.
• Fair Price — priced within the expected range for comparable vehicles.
• Overpriced — priced above the typical range for comparable vehicles.

This rating refreshes daily as inventory enters and leaves the market. The dealer on this listing has not yet activated on OAV, so the business name and contact details are anonymized here. Activated (paying) dealers appear with their verified business name and a Verified badge.

How this listing is verified

This vehicle listing was aggregated from an independent dealer in Castle Rock, CO, one of 57,000+ U.S. dealerships in OAV's nationwide inventory network.The VIN 1GT12SEG3JF289146 can be independently verified via the U.S. Department of Transportation's NHTSA VIN decoder, and safety recalls at NHTSA's recall database.

Vehicle attributes (year, make, model, trim, mileage, location) are standardized using OAV's patented methodology (U.S. Patent No. 12,236,477), which normalizes naming conventions and deduplicates cross-listed inventory across the dealership network. Listing data is refreshed daily; Price-to-Market analysis uses comparable vehicles within the same geographic market.

2018 GMC Sierra 2500HD Market in CO

Based on 58 comparable 2016-2020 GMC Sierra 2500HD listings in CO, the average asking price is $40,848. This listing at $28,998 is $11,850 below average (29% below market). Comparable prices in CO range from $13,400 to $63,999. Similar vehicles spend an average of 47 days on dealer lots in this market.

Similar GMC Sierra 2500HD Listings in CO

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