U.S. Patent No. 12,236,477 — Patented Automotive Data Standardization Technology
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Vehicle Details

VIN3GKALMEV6ML331802
TrimSLE
Exterior ColorGray
DrivetrainFWD
Engine1.5L I4
TransmissionAutomatic
Fuel TypeUnleaded
Inventory Typeused
Days on Lot66

2021 GMC Terrain

SLE

Great Deal
$12,995125,484 mi

Milwaukee, WI 53215

Is this 2021 GMC Terrain SLE a good deal?

OAV verdict: Great Deal

Why: Listed at $12,995, comparable market range $16,990–$25,957, based on 44 comparable listings. Days on lot: 66 days (market average 60 days).

Market price position

16,990
25,957
12,995

$12,995 · $3,995 below market low

$16,990comparable$25,957
Regional range
$16,990 – $25,957
vs. market low
— $3,995 (24% below)
Comparable vehicles
44
Demand-Verified· Backed by recent sales data

Similar vehicles recently sold in an estimated 2277 days.

Market Breakdown

Local = comparable listings in the same metro. Regional = comparable listings across the broader state or multi-state region. Both ranges refresh daily.

Regional Range$16,990 – $25,957

Millennium Motor Sales

Milwaukee, WI

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

View all vehicles from millennium motor sales

Request availability and out-the-door price

OAV will route your inquiry to Millennium Motor Sales for current availability of this 2021 GMC Terrain SLE 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 Terrain

Listing updated: Jul 8, 2026

Listed by an independent dealer in Milwaukee, WI · On lot for 66 days · VIN verifiable at NHTSA

This used 2021 GMC Terrain SLE is listed at $12,995 by millennium motor sales in Milwaukee, WI 53215. It has 125,484 miles on the odometer. The exterior color is Gray. It features a FWD drivetrain with a 1.5L I4 engine and Automatic transmission.

OAV's AI-powered Price-to-Market analysis rates this vehicle as a Great Deal — priced below market value. Based on 44 similar vehicles in the Milwaukee market, the estimated market range is $16,990 to $25,957.

This vehicle has been on the lot for 66 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 Milwaukee, WI suvs 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 Terrain 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:

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 Milwaukee, WI, one of 57,000+ U.S. dealerships in OAV's nationwide inventory network.The VIN 3GKALMEV6ML331802 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 Terrain Market in WI

Comparable Vehicles

843

Average Price

$22,323

Price Range

$9,995–$36,549

Avg Days on Lot

60

Based on 843 comparable 2019-2023 GMC Terrain listings in WI, the average asking price is $22,323. This listing at $12,995 is $9,328 below average (42% below market). Comparable prices in WI range from $9,995 to $36,549. Similar vehicles spend an average of 60 days on dealer lots in this market.

Similar GMC Terrain Listings in WI

8 comparable vehicles within ±2 model years and ±30,000 miles (subject trim: SLE — compare trims below)