Skip to content

Change language

en English pl Polski ru Русский ar العربية az Azərbaycanca de Deutsch es Español fr Français hy Հայերեն ka ქართული lt Lietuvių pt Português ua Українська

FinalBid / Copart + IAAI

2018 GMC Sierra 3500HD auction results: final bids and sale history

FinalBid holds 132 completed Copart and IAAI auctions for 2018 GMC Sierra 3500HD. Across 127 recorded USD final bids, the median sold price is $12,000. Most of those cars were sold with front end. Half of the 45 verified odometer readings sit above 134,557 mi. The oldest auction in the archive closed in Jun 17, 2019, the newest in Oct 15, 2026. Auction results for the 2018 GMC Sierra 3500HD 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 3500HD belongs in the sold-price range rather than guessing at an average.

$11,800
Median final bid
$6,700–$15,000
Middle half
$21,880
Top 10% from
$26,000
Highest

Price index

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

$5,600 $11,030 $16,470 $21,900 Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep $6,025

Copart vs IAAI

Copart 32 sold median $12,100
IAAI 1 sold median $3,525

Last 12 months · updated October 14, 2026

Sierra 3500HD years

2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 1995 1993

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 Denali Classic Sierra EV Sonoma Suburban Terrain Van Vandura Yukon Yukon Denali Yukon XL

Auction archive FAQ

How much does a 2018 GMC Sierra 3500HD sell for at Copart and IAAI?

Over the last 12 months the median final bid for a 2018 GMC Sierra 3500HD was $11,800; half of the 33 sales went for $6,700 to $15,000.

Is a 2018 GMC Sierra 3500HD cheaper at Copart or IAAI?

Median final bid over the last 12 months: Copart $12,100, IAAI $3,525.

How much does a 2018 GMC Sierra 3500HD sell for at auction?

The auction results listed here are the answer — every 2018 GMC Sierra 3500HD 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 3500HD 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 3500HD

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

Example VIN history →