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Used GMC Sierra for Sale in Boulder, CO

5 used GMC Sierra listed by 3 local dealers in Boulder, CO. Median asking price $51,499.

5vehicles
3dealerships
$46,303–$59,498price range
$51,499median price
45,771median miles

5 vehicles

Frequently asked questions

How many used cars are for sale in Boulder, CO (GMC Sierra)?
AutosXchange currently lists 5 vehicles in Boulder, CO (GMC Sierra) from 3 dealerships.
What is the average price of a used car in Boulder, CO (GMC Sierra)?
The median dealer-advertised price is $51,499, ranging from $46,303 to $59,498.
What are the most common makes for sale in Boulder, CO (GMC Sierra)?
The most-listed makes are GMC (5).

Dealer listings are supplied by each dealership from its own website and refreshed as inventory changes; prices are dealer-advertised asking prices, so confirm availability, fees and final price with the selling dealer. Listings marked "Private seller" are submitted by the car's owner and reviewed by AutosXchange; AutosXchange does not inspect private-party vehicles.

AutosXchange Intel

Who removed and who added cars in Boulder, CO

Last 7 days, from listing tracking of every dealer. Removed = not advertised anywhere since (not always a sale); cars moved to another dealer and bulk feed changes are not counted.

Removed the most

  1. Corwin Toyota Boulder — 63 removed (2026 Toyota Sienna ×5…)
  2. Fowler Jeep of Boulder — 1 removed (2027 Jeep Wrangler…)

All 64 cars removed in Boulder, CO, last 7 days →

Added the most

  1. Corwin Toyota Boulder — 42 added (2026 Toyota RAV4 ×7…)

All 42 cars added in Boulder, CO, last 7 days →

Dealer activity in Boulder, CO · Heatmap