• SLT
  • SLE
  • Denali
  • SL
  • Work Truck
  • Base
  • 4WD
  • Great Deal
  • Well-Equipped
  • 8 Cyl
  • Flexible-Fuel
  • White
  • Black
  • Heated Seats
  • Keyless Entry
  • Good Deal
  • Low Mileage
  • Navigation System
  • Gasoline
  • Gray
  • 2014
  • One Owner
  • Seat Memory
  • Silver
  • Blue
  • Low Fuel Costs
  • Handsfree/Bluetooth Integration
  • 2015
  • 2012
  • Automatic
  • Lower Than Average Mileage
  • 2017
  • 2013
  • Going Fast
  • Popular Model
  • 2016
  • RWD
  • AWD
  • 2011
  • Certified Pre-Owned
  • Fair Price
  • Brown
  • 2010
  • 2008
  • 2006
  • 2009
  • 2007
  • MP3
  • 6 Cyl
  • 2005
  • 2004
  • Beige
  • Bronze
  • 1999
  • 2002
  • 2003
  • 1998
  • 2000
  • 1996
  • 2001
  • 1995
  • 1997

Price Range

$0 $60,000+

Max Mileage

New $80,000+

MPG

Min 14 Max 50

MORE

487 Results for

Used GMC Sierra 1500 For Sale in Longmont, CO

Search Results

Automatic / 4WD / 8 Cyl
15 mpg city / 21 mpg hwy

  • Dealer Page
  • Get Directions
$24,991

2013 GMC Sierra 1500 SLT

136,180 miles / Fort Collins, CO

Photo 1: 2017 GMC Sierra 1500 Denali with  in Aurora, CO
Photo 2: 2017 GMC Sierra 1500 Denali with  in Aurora, CO
Photo 3: 2017 GMC Sierra 1500 Denali with  in Aurora, CO
Photo 4: 2017 GMC Sierra 1500 Denali with  in Aurora, CO
Photo 5: 2017 GMC Sierra 1500 Denali with  in Aurora, CO

Automatic / 4WD / 8 Cyl
15 mpg city / 20 mpg hwy

  • Dealer Page
  • Call
  • Get Directions
$60,096

2017 GMC Sierra 1500 Denali

35 miles / Aurora, CO

Photo 1:  2014 GMC Sierra 1500 SLT in Brighton, CO exterior view of driver's side

Automatic / 4WD / 8 Cyl
16 mpg city / 22 mpg hwy

  • Dealer Page
  • Call
  • Get Directions
$37,486

2014 GMC Sierra 1500 SLT

28,243 miles / Brighton, CO

Photo 1: Iridium Metallic 2014 GMC Sierra 1500 Denali in Denver, CO exterior view from front driver's side
Photo 2: Iridium Metallic 2014 GMC Sierra 1500 Denali in Denver, CO
Photo 3: Iridium Metallic 2014 GMC Sierra 1500 Denali in Denver, CO exterior view of passenger side
Photo 4: Iridium Metallic 2014 GMC Sierra 1500 Denali in Denver, CO exterior view from rear driver's side
Photo 5: Iridium Metallic 2014 GMC Sierra 1500 Denali in Denver, CO view of rear bumper

Automatic / 4WD / 8 Cyl
14 mpg city / 20 mpg hwy

  • Call Dealer
  • Get Directions
$37,991

2014 GMC Sierra 1500 Denali

30,083 miles / Denver, CO

Photo 1: 2014 GMC Sierra 1500 SLT with  in Englewood, CO
Photo 2: 2014 GMC Sierra 1500 SLT with  in Englewood, CO
Photo 3: 2014 GMC Sierra 1500 SLT with  in Englewood, CO
Photo 4: 2014 GMC Sierra 1500 SLT with  in Englewood, CO
Photo 5: 2014 GMC Sierra 1500 SLT in Englewood, CO

Automatic / 4WD / 8 Cyl
16 mpg city / 22 mpg hwy

  • Dealer Page
  • Call
  • Get Directions
$31,287

2014 GMC Sierra 1500 SLT

91,284 miles / Englewood, CO

Photo 1: 2014 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 2: 2014 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 3: 2014 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 4: 2014 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 5: 2014 GMC Sierra 1500 SLT with  in Aurora, CO

Automatic / 4WD / 8 Cyl
16 mpg city / 22 mpg hwy

  • Dealer Page
  • Call
  • Get Directions
$39,900

2014 GMC Sierra 1500 SLT

24,825 miles / Aurora, CO

Photo 1: Onyx Black 2016 GMC Sierra 1500 SLT in Dacono, CO exterior view from front driver's side
Photo 2: Onyx Black 2016 GMC Sierra 1500 SLT in Dacono, CO
Photo 3: cockpit view from driver’s seat 2016 GMC Sierra 1500 SLT in Dacono, CO
Photo 4: Onyx Black 2016 GMC Sierra 1500 SLT in Dacono, CO exterior view of driver's side
Photo 5: Onyx Black 2016 GMC Sierra 1500 SLT in Dacono, CO exterior view from rear driver's side

Automatic / 4WD / 8 Cyl
15 mpg city / 21 mpg hwy

  • Call Dealer
  • Get Directions
$46,553

2016 GMC Sierra 1500 SLT

4,111 miles / Dacono, CO

Photo 1: 2013 GMC Sierra 1500 SLT with  in Greeley, CO
Photo 2: 2013 GMC Sierra 1500 SLT with  in Greeley, CO
Photo 3: 2013 GMC Sierra 1500 SLT with  in Greeley, CO
Photo 4: 2013 GMC Sierra 1500 SLT with  in Greeley, CO
Photo 5: 2013 GMC Sierra 1500 SLT in Greeley, CO

Automatic / 4WD / 8 Cyl
15 mpg city / 21 mpg hwy

  • Get Directions
$28,900

2013 GMC Sierra 1500 SLT

46,199 miles / Greeley, CO

Photo 1: Summit White 2013 GMC Sierra 1500 SLT in Loveland, CO exterior view from front driver's side
Photo 2: Summit White 2013 GMC Sierra 1500 SLT in Loveland, CO
Photo 3: cockpit view from driver’s seat 2013 GMC Sierra 1500 SLT in Loveland, CO
Photo 4: interior dashboard and console 2013 GMC Sierra 1500 SLT in Loveland, CO
Photo 5: interior dashboard and console 2013 GMC Sierra 1500 SLT in Loveland, CO

Automatic / 4WD / 8 Cyl
15 mpg city / 21 mpg hwy

  • Get Directions
$30,494

2013 GMC Sierra 1500 SLT

68,506 miles / Loveland, CO

Photo 1: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 2: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 3: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 4: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 5: 2017 GMC Sierra 1500 SLT with  in Aurora, CO

Automatic / 4WD / 8 Cyl
15 mpg city / 20 mpg hwy

  • Dealer Page
  • Call
  • Get Directions
$56,205

2017 GMC Sierra 1500 SLT

8 miles / Aurora, CO

Photo 1: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 2: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 3: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 4: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 5: 2017 GMC Sierra 1500 SLT with  in Aurora, CO

Automatic / 4WD / 8 Cyl
15 mpg city / 20 mpg hwy

  • Dealer Page
  • Call
  • Get Directions
$54,707

2017 GMC Sierra 1500 SLT

12 miles / Aurora, CO

Photo 1: 2017 GMC Sierra 1500 SLE with  in Aurora, CO
Photo 2: 2017 GMC Sierra 1500 SLE with  in Aurora, CO
Photo 3: 2017 GMC Sierra 1500 SLE with  in Aurora, CO
Photo 4: 2017 GMC Sierra 1500 SLE with  in Aurora, CO
Photo 5: 2017 GMC Sierra 1500 SLE with  in Aurora, CO

Automatic / 4WD / 8 Cyl
15 mpg city / 20 mpg hwy

  • Dealer Page
  • Call
  • Get Directions
$47,688

2017 GMC Sierra 1500 SLE

10 miles / Aurora, CO

Photo 1: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 2: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 3: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 4: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 5: 2017 GMC Sierra 1500 SLT with  in Aurora, CO

Automatic / 4WD / 8 Cyl
15 mpg city / 20 mpg hwy

  • Dealer Page
  • Call
  • Get Directions
$53,244

2017 GMC Sierra 1500 SLT

17 miles / Aurora, CO

Photo 1: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 2: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 3: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 4: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 5: 2017 GMC Sierra 1500 SLT with  in Aurora, CO

Automatic / 4WD / 8 Cyl
15 mpg city / 20 mpg hwy

  • Dealer Page
  • Call
  • Get Directions
$53,244

2017 GMC Sierra 1500 SLT

10 miles / Aurora, CO

Photo 1: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 2: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 3: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 4: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 5: 2017 GMC Sierra 1500 SLT with  in Aurora, CO

Automatic / 4WD / 8 Cyl
15 mpg city / 20 mpg hwy

  • Dealer Page
  • Call
  • Get Directions
$53,249

2017 GMC Sierra 1500 SLT

19 miles / Aurora, CO

Photo 1: 2017 GMC Sierra 1500 with  in Aurora, CO
Photo 2: 2017 GMC Sierra 1500 with  in Aurora, CO
Photo 3: 2017 GMC Sierra 1500 with  in Aurora, CO
Photo 4: 2017 GMC Sierra 1500 with  in Aurora, CO
Photo 5: 2017 GMC Sierra 1500 with  in Aurora, CO

Automatic / 4WD / 8 Cyl
15 mpg city / 20 mpg hwy

  • Dealer Page
  • Call
  • Get Directions
$41,686

2017 GMC Sierra 1500

5 miles / Aurora, CO

Photo 1: Summit White 2014 GMC Sierra 1500 SLT in Brighton, CO exterior view from front driver's side
Photo 2: Summit White 2014 GMC Sierra 1500 SLT in Brighton, CO
Photo 3: cockpit view from driver’s seat 2014 GMC Sierra 1500 SLT in Brighton, CO
Photo 4: cockpit view from driver’s seat 2014 GMC Sierra 1500 SLT in Brighton, CO
Photo 5: interior dashboard and console 2014 GMC Sierra 1500 SLT in Brighton, CO

Automatic / 4WD / 8 Cyl
16 mpg city / 22 mpg hwy

  • Dealer Page
  • Call
  • Get Directions
$34,486

2014 GMC Sierra 1500 SLT

36,558 miles / Brighton, CO

Photo 1: 2014 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 2: 2014 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 3: 2014 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 4: 2014 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 5: 2014 GMC Sierra 1500 SLT with  in Aurora, CO

Automatic / 4WD / 8 Cyl
16 mpg city / 22 mpg hwy

  • Dealer Page
  • Call
  • Get Directions
$38,900

2014 GMC Sierra 1500 SLT

31,987 miles / Aurora, CO

Photo 1: 2017 GMC Sierra 1500 Denali with  in Aurora, CO
Photo 2: 2017 GMC Sierra 1500 Denali with  in Aurora, CO
Photo 3: 2017 GMC Sierra 1500 Denali with  in Aurora, CO
Photo 4: 2017 GMC Sierra 1500 Denali with  in Aurora, CO
Photo 5: 2017 GMC Sierra 1500 Denali with  in Aurora, CO

Automatic / 4WD / 8 Cyl
15 mpg city / 20 mpg hwy

  • Dealer Page
  • Call
  • Get Directions
$59,556

2017 GMC Sierra 1500 Denali

38 miles / Aurora, CO

Photo 1: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 2: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 3: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 4: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 5: 2017 GMC Sierra 1500 SLT with  in Aurora, CO

Automatic / 4WD / 8 Cyl
15 mpg city / 20 mpg hwy

  • Dealer Page
  • Call
  • Get Directions
$56,205

2017 GMC Sierra 1500 SLT

7 miles / Aurora, CO

Photo 1: 2014 GMC Sierra 1500 SLE with  in Golden, CO

Automatic / 4WD / 8 Cyl
16 mpg city / 22 mpg hwy

  • Call Dealer
  • Get Directions
$33,237

2014 GMC Sierra 1500 SLE

37,774 miles / Golden, CO

Photo 1: Pewter Gray 2006 GMC Sierra 1500 SLT in Longmont, CO exterior view from front driver's side
Photo 2: Pewter Gray 2006 GMC Sierra 1500 SLT in Longmont, CO
Photo 3: cockpit view from driver’s seat 2006 GMC Sierra 1500 SLT in Longmont, CO
Photo 4: 2006 GMC Sierra 1500 SLT in Longmont, CO
Photo 5: 2006 GMC Sierra 1500 SLT in Longmont, CO

Automatic / 4WD / 8 Cyl
13 mpg city / 17 mpg hwy

  • Call Dealer
  • Get Directions
$15,295

2006 GMC Sierra 1500 SLT

124,831 miles / Longmont, CO

Photo 1: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 2: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 3: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 4: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 5: 2017 GMC Sierra 1500 SLT with  in Aurora, CO

Automatic / 4WD / 8 Cyl
15 mpg city / 20 mpg hwy

  • Dealer Page
  • Call
  • Get Directions
$54,033

2017 GMC Sierra 1500 SLT

20 miles / Aurora, CO

Photo 1: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 2: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 3: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 4: 2017 GMC Sierra 1500 SLT with  in Aurora, CO
Photo 5: 2017 GMC Sierra 1500 SLT with  in Aurora, CO

Automatic / 4WD / 8 Cyl
15 mpg city / 20 mpg hwy

  • Dealer Page
  • Call
  • Get Directions
$54,895

2017 GMC Sierra 1500 SLT

6 miles / Aurora, CO