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FinalBid / Copart + IAAI

2018 GMC Sierra 1500 auction results: final bids and sale history

FinalBid holds 5,615 completed Copart and IAAI auctions for 2018 GMC Sierra 1500. Across 5,219 recorded USD final bids, the median sold price is $7,850. Most of those cars were sold with front end. Half of the 3,497 verified odometer readings sit above 111,851 mi. The oldest auction in the archive closed in Jun 11, 2019, the newest in Oct 17, 2026. Auction results for the 2018 GMC Sierra 1500 at Copart and IAAI. Each sold lot below shows the final bid together with the damage, odometer and title that explain it, so you can see where a particular 2018 GMC Sierra 1500 belongs in the sold-price range rather than guessing at an average.

$7,200
Median final bid
$5,000–$9,600
Middle half
$12,500
Top 10% from
$24,000
Highest

Price index

Median final bid by month (line) and number of sales (bars), last 12 months.

$6,200 $6,930 $7,670 $8,400 Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct $7,025

Where they go

Buyer country of the winning bid, with the median price and model year each market buys. Shares of 1,709 sales with a known buyer country.

Buyer country Share Median final bid Median model year
United States
75%
$7,075 2018
Mexico
23%
$7,500 2018
Oman
1%
$4,000 2018
United Arab Emirates
0.2%
$2,588 2018
Guatemala
0.2%
$9,500 2018
El Salvador
0.1%
$3,800 2018
Armenia
0.1%
$9,800 2018
Bahamas
0.1%
$13,050 2018
Canada
0.1%
$7,550 2018
Georgia
0.1%
$8,900 2018
Honduras
0.1%
$3,200 2018
Lebanon
0.1%
$2,050 2018
Other countries 0%

Country totals only. Individual lots do not show the buyer's country.

Copart vs IAAI

Copart 1,363 sold median $7,000
IAAI 775 sold median $7,500

Last 12 months · updated October 14, 2026

Top recent results

The highest final bids among the latest sales.

Date Vehicle Damage Final bid
Oct 9, 2026 2018 GMC Sierra 1500 Denali Front end $17,200
Oct 6, 2026 2018 GMC Sierra 1500 Denali Minor dents & scratches $15,900
Oct 3, 2026 2018 GMC Sierra 1500 SLT Hail $15,900
Oct 3, 2026 2018 GMC Sierra 1500 Denali Minor dents & scratches $15,500

Sierra 1500 years

2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971 1969 1968 1966 1964 1955 1948

GMC models

1 Ton Pickups 2500 Pickups 3500 Pickups Acadia Caballero Canyon Denali Envoy HUMMER EV HUMMER EV Pickup Jimmy Rally S15 4WD Safari Safari Cargo Savana Savana Cargo Savana Commercial Sierra 1500 Sierra 1500HD Sierra 1500HD Classic Sierra 2500 Sierra 2500HD Sierra 3500 Sierra 3500HD Sierra Denali Sierra EV Sonoma Suburban Terrain Van Vandura Yukon Yukon Denali Yukon XL

Auction archive FAQ

How much does a 2018 GMC Sierra 1500 sell for at Copart and IAAI?

Over the last 12 months the median final bid for a 2018 GMC Sierra 1500 was $7,200; half of the 2,138 sales went for $5,000 to $9,600.

Where do 2018 GMC Sierra 1500 cars from US auctions go?

Among sales with a known buyer country: United States (75%), Mexico (23%), Oman (1%).

Is a 2018 GMC Sierra 1500 cheaper at Copart or IAAI?

Median final bid over the last 12 months: Copart $7,000, IAAI $7,500.

How much does a 2018 GMC Sierra 1500 sell for at auction?

The auction results listed here are the answer — every 2018 GMC Sierra 1500 lot carries its own final bid. Read the range and place your car inside it instead of trusting one figure.

What pushes a 2018 GMC Sierra 1500 final bid to the bottom of the range?

Water and fire losses, missing keys, deployed airbags and a branded title. Any two of those together usually explain a sold price that looks improbably low.

VIN history beyond the auction

Look past the final bid on any 2018 GMC Sierra 1500

Title brands, accident reports and odometer entries: the VIN history behind any auction lot.

Example VIN history →