Cheapest · Used 2018 GMC C6
Rank #1 / 39 listings
Cheapest Used 2018 GMC C6 for Sale in the US
The cheapest used 2018 GMC C6 in the US today costs $15,997 — a 2018 Medium Conventional 97 located in Denver, CO. We track 39 active listings; the median price is $23,000, so the top deal is $7,003 under the median.
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cheapest per yearTop 10 cheapest listings
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$16,0002018 GMC C6 Medium Conventional 97185,503 mi · Fenton, MO · Jim Butler ChevroletView listing → -
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$16,9952018 GMC C6 Medium Conventional 97124,417 mi · Lansing, MI · Twins Auto Sales - LansingView listing → -
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$18,0002018 GMC C6 Medium Conventional 97146,401 mi · Louisburg, KS · Louisburg Ford Sales Inc.View listing → -
$18,8142018 GMC C6 Medium Conventional 97140,443 mi · Lansing, MI · LaFontaine Ford LansingView listing → -
$19,9002018 GMC C6 Medium Conventional 97117,902 mi · Gladstone, MI · Superior Used CarsView listing →
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$21,1432018 GMC C6 Medium Conventional 97101,039 mi · Waterloo, IL · Springer Auto SalesView listing →
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10 pinnedFAQ
How much does the cheapest used 2018 GMC C6 cost?
$15,997 — a 2018 Medium Conventional 97 in Denver, CO (as of 2026-07-19).
What is the median price of a used 2018 GMC C6?
$23,000 across 39 US dealer active listings.
How often are prices updated?
Listings and prices refresh continuously; this page is re-generated at least twice a day.
Explore more
Prices updated 2026-07-19. Data covers active dealer listings across the USA.