Is the $42,200 price on this 2021 GMC Sierra 3500HD a good deal?

OAV rates this as Fair Price because the asking price of $42,200 is within the typical market range for this vehicle.

What is the average price for a 2021 GMC Sierra 3500HD in CO?

Based on 85 comparable listings in CO, the average asking price for a 2019-2023 GMC Sierra 3500HD is $54,226, with prices ranging from $28,488 to $70,594.

How long does a 2021 GMC Sierra 3500HD typically stay on dealer lots?

Comparable GMC Sierra 3500HD listings in CO spend an average of 50 days on dealer lots.

Where is this 2021 GMC Sierra 3500HD located?

This vehicle is listed in Castle Rock, CO 80104. VIN: 1GT49SEY8MF235699. Mileage: 75,641 miles.

What is the fair market price range for this 2021 GMC Sierra 3500HD?

OAV's Price-to-Market analysis estimates the fair market range is $42,200 to $42,200, based on available comparable vehicles.

No Photo Available

Vehicle Details

VIN1GT49SEY8MF235699

TrimBase

Exterior ColorBrown

Drivetrain4WD

Engine6.6L V8

TransmissionAutomatic

Fuel TypeDiesel

Inventory Typeused

Days on Lot143

2021 GMC Sierra 3500HD

Base

Unscored

$42,20075,641 mi

Castle Rock, CO 80104

Is this 2021 GMC Sierra 3500HD Base a good deal?

OAV verdict: Unscored

Why: Listed at $42,200, comparable market range $42,200–$42,200. Days on lot: 143 days (market average 50 days).

Market price position

$42,200 · only listing at this price

$42,200 — single data point

Regional range: $42,200 (0 listings)
vs. market: Exact match — no spread
Comparable vehicles: 0

Market Retail Price (MRP™)

$42,200

This vehicle $42,200 · priced at MRP

MRP™ is the midpoint of the comparable market range — the representative price the market is asking for similar vehicles. How MRP works.

True Retail Value (TRV™)

$48,959

This vehicle $42,200 · $6,759 (14%) below TRV

TRV™ is the average paid price for cars like this in the last 60 days (sold data through 2026-07-15) — an estimate, not an appraisal. How TRV works.

Demand-Verified· Backed by recent sales data

Faster-than-average sell-through

Similar vehicles recently sold in an estimated 11–60 days.

What does Demand-Verified mean?

Berkenkotter Motors

Castle Rock, CO

OAV routes your inquiry; pricing, taxes, fees, and availability come from the dealer.

View all vehicles from berkenkotter motors →

Request availability and out-the-door price

OAV will route your inquiry to Berkenkotter Motors for current availability of this 2021 GMC Sierra 3500HD Base and an out-the-door price quote (taxes, fees, addons included).

OAV routes your inquiry; pricing, taxes, fees, and availability come from the dealer.

About This 2021 GMC Sierra 3500HD

Listing updated: Jul 15, 2026

Listed by an independent dealer in Castle Rock, CO · On lot for 143 days · VIN verifiable at NHTSA

This used 2021 GMC Sierra 3500HD Base is listed at $42,200 by berkenkotter motors in Castle Rock, CO 80104. It has 75,641 miles on the odometer. The exterior color is Brown. It features a 4WD drivetrain with a 6.6L V8 engine and Automatic transmission.

OAV's AI-powered Price-to-Market analysis rates this vehicle as Unscored due to insufficient comparable data. Based on available similar vehicles in the Castle Rock market, the estimated market range is $42,200 to $42,200.

This vehicle has been on the lot for 143 days.

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

Market context

This listing is part of OAV's broader Castle Rock, CO trucks market analysis. OAV compares vehicles using local and regional price-to-market ranges, days-on-lot, comparable count, and demand signals where available.

How this deal is rated

OAV compares this 2021 GMC Sierra 3500HD 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.

Listings show OAV's PTM-derived deal quality and live market context. OAV-claimed dealers manage their listing profile and route buyer inquiries directly. Paid OAV partners surface additional verification signals.

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 1GT49SEY8MF235699 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.

2021 GMC Sierra 3500HD Market in CO

Comparable Vehicles

Average Price

$54,226

Price Range

$28,488–$70,594

Avg Days on Lot

Based on 85 comparable 2019-2023 GMC Sierra 3500HD listings in CO, the average asking price is $54,226. This listing at $42,200 is $12,026 below average (22% below market). Comparable prices in CO range from $28,488 to $70,594. Similar vehicles spend an average of 50 days on dealer lots in this market.