Vehicle Details
2020 GMC Sierra 1500
SLE
South Portland, ME 04106
Is this 2020 GMC Sierra 1500 SLE a good deal?
OAV verdict: Unscored
Why: Listed at $29,996, comparable market range $24,486–$36,998, based on 3 comparable listings. Days on lot: 44 days (market average 57 days).
Market price position
$29,996 · within market range
- Regional range
- $24,486 – $36,998
- vs. market
- $5,510 above low · $7,002 below high
- Comparable vehicles
- 3
Similar vehicles recently sold in an estimated 11–55 days.
What does Demand-Verified mean?
Market Breakdown
Local = comparable listings in the same metro. Regional = comparable listings across the broader state or multi-state region. Both ranges refresh daily.
Dealer Info
South Portland, ME
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About This 2020 GMC Sierra 1500
Listing updated: May 23, 2026Listed by a franchise dealer in South Portland, ME · On lot for 44 days · VIN verifiable at NHTSA
This used 2020 GMC Sierra 1500 SLE is listed at $29,996 by a franchise dealer in South Portland, ME 04106. It has 72,597 miles on the odometer. The exterior color is Black. It features a 4WD drivetrain with a 5.3L 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 3 similar vehicles in the South Portland market, the estimated market range is $24,486 to $36,998.
This vehicle has been on the lot for 44 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 South Portland, ME 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 2020 GMC Sierra 1500 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 a franchise dealer in South Portland, ME, one of 57,000+ U.S. dealerships in OAV's nationwide inventory network.The VIN 1GTR9BED0LZ231503 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.
2020 GMC Sierra 1500 Market in ME
Comparable Vehicles
367
Average Price
$35,359
Price Range
$18,995–$49,995
Avg Days on Lot
57
Based on 367 comparable 2018-2022 GMC Sierra 1500 listings in ME, the average asking price is $35,359. This listing at $29,996 is $5,363 below average (15% below market). Comparable prices in ME range from $18,995 to $49,995. Similar vehicles spend an average of 57 days on dealer lots in this market.
Similar GMC Sierra 1500 Listings in ME
8 comparable vehicles within ±2 model years and ±30,000 miles (subject trim: SLE — compare trims below)
2021 GMC Sierra 1500
SLE
Brunswick, ME
2021 GMC Sierra 1500
SLE
Lewiston, ME
2019 GMC Sierra 1500
SLE
Falmouth, ME
2021 GMC Sierra 1500
SLE
Auburn, ME
2021 GMC Sierra 1500
SLE
Biddeford, ME
2019 GMC Sierra 1500
SLE
South Portland, ME
2020 GMC Sierra 1500
AT4
Newcastle, ME
2020 GMC Sierra 1500
AT4
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