Used 2018 GMC Sierra 1500 for Sale near Denver, CO
301 results
CarGurus Analysis:
2018 GMC Sierra 1500
With 293 currently listed for sale near Denver, CO and an average price of $28,315.00, 25.6% of 2018 GMC Sierras for sale on CarGurus are rated as good or great deals.
Favorably reviewed: Owners rated the 2018 GMC Sierra 1500 4.44 / 5 stars.
71.0% of 2018 Sierra models on CarGurus are accident free.
The 2018 GMC Sierra 1500 enhances its appeal with standard GMC’s IntelliLink infotainment system across all trims and includes a reversing camera and various advanced safety features.
CarGurus Analysis: 2018 GMC Sierra 1500
overall
Summary
With 293 currently listed for sale near Denver, CO and an average price of $28,315.00, 25.6% of 2018 GMC Sierras for sale on CarGurus are rated as good or great deals.
Favorably reviewed: Owners rated the 2018 GMC Sierra 1500 4.44 / 5 stars.
71.0% of 2018 Sierra models on CarGurus are accident free.
The 2018 GMC Sierra 1500 enhances its appeal with standard GMC’s IntelliLink infotainment system across all trims and includes a reversing camera and various advanced safety features.
Why it stands out
The 2018 GMC Sierra 1500 impresses with its combination of luxury, performance, and functionality, making it a strong contender in the pickup segment. With its sophisticated styling and spacious cabin, the Sierra is designed to accommodate both work and leisure. Notably, GMC has made significant upgrades for this model year, such as standardizing the IntelliLink infotainment system and enhancing safety with features like a reversing camera and the Easy Fill Alert tire pressure monitoring system. The vehicle is available with powerful engine options, including a capable 6.2-liter V8, which provides exceptional towing capabilities—up to 12,500 pounds when properly equipped. Although there are some minor drawbacks, such as limited sightlines in tight spaces, the GMC Sierra's blend of luxury and utility makes it appealing to a wide range of buyers, whether they prioritize work performance or comfort.
Other model years to consider
- Average price: $53,511.00
- Good/great deal percentage: 28.4%
- User rating: 5 / 5
- Total listings: 598
- Average price: $45,512.00
- Good/great deal percentage: 25.5%
- User rating: 5 / 5
- Total listings: 537
- Average price: $34,680.00
- Good/great deal percentage: 26.0%
- User rating: 4.28 / 5
- Total listings: 407
This analysis is based on CarGurus' proprietary market data from May 26, 2026, CarGurus experts' opinions, and generative AI.
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4.5 Overall rating
Filter by rating
Ryan A
Reviewed a 2018 GMC Sierra 1500 on Aug 5, 2025
Only thing i didn’t like is the gas mileage. Mine is slightly lifted though and averages about 13 miles to the gallon
Edward E
Reviewed a 2018 GMC Sierra 1500 on Feb 28, 2020
2018 GMC Sierra. Simply the best driving & riding truck I have ever owned. The magnetic ride sets it apart and was the reason I purchased a 2018 vs the newer body style without it. It’s also the reason I choose it over similar Ford and Dodge trucks.
Anonymous
Reviewed a 2018 GMC Sierra 1500 on Mar 3, 2021
very luxurious and drives incredible smooth.. Wouldnt know its a pickup truck
Jason J
Reviewed a 2018 GMC Sierra 1500 on Aug 20, 2022
Great truck, but not liking this heavy shudder from the torque converter.
2018 GMC Sierra 1500 Trims
| Trim type | MSRP |
|---|---|
| SLT Double Cab 4WD | $46,000 |
| Base | $29,000 |
| SLE Crew Cab 4WD | $44,700 |
| Base Double Cab 4WD | $37,000 |
| SLE Double Cab 4WD | $42,100 |
| SLT Crew Cab | $45,200 |
| Denali Crew Cab 4WD | $56,000 |
| SLT Crew Cab 4WD | $48,400 |
2018 GMC Sierra 1500 Price Trends
CarGurus tracks the prices of millions of used car listings every year. See how the average price of 2018 GMC Sierra 1500 prices has changed over time.
See more price trends2018 GMC Sierra 1500 Pricing Analysis: Denver, CO Market Report
Pricing by Nearby Locations
Market Area: Denver, CO
Key Insights
- Highest Price in Cheyenne: The market in Cheyenne, WY ($37,998) shows the highest average price, likely reflecting limited supply or higher demand.
- Lowest Prices in Castle Rock: Castle Rock, CO ($28,333) and Longmont, CO ($28,150) offer the lowest price points, making them more appealing for budget-conscious buyers.
- Inventory Impact on Pricing: Inventory levels are relatively consistent across locations, with Castle Rock (299 listings) leading to a competitive price range.
City-Level Pricing
| City | Total Listings | Avg Price |
|---|---|---|
| Cheyenne, WY | 266 | $37,998 |
| Fort Collins, CO | 259 | $30,331 |
| Colorado Springs, CO | 271 | $29,604 |
| Pueblo, CO | 265 | $30,184 |
| Grand Junction, CO | 236 | $28,194 |
| Longmont, CO | 296 | $28,150 |
| Castle Rock, CO | 299 | $28,333 |
Pricing Analysis by Model Year
Key Insights
- New Models Command Premiums: The 2026 GMC Sierra 1500 averages $61,993, representing a significant markup of +62.5% over its original MSRP.
- Steep Depreciation Trend: Older models see considerable price drops, particularly the 2014 GMC Sierra 1500, which is priced -25.0% below its original MSRP.
- Value Sweet Spot in 2021 Models: The 2021 GMC Sierra 1500 at $36,557 provides strong value, with a modest depreciation of -17.9% compared to its MSRP.
Model Year Pricing
| Model Year | Original MSRP | Avg Price | Price vs MSRP |
|---|---|---|---|
| 2026 | $38,300 | $61,993 | +62.5% |
| 2025 | $38,300 | $53,603 | +40.0% |
| 2024 | $37,700 | $52,962 | +40.4% |
| 2023 | $37,100 | $48,743 | +31.4% |
| 2022 | $35,400 | $45,469 | +28.5% |
| 2021 | $30,100 | $36,557 | -17.9% |
| 2020 | $29,600 | $34,062 | +15.0% |
| 2019 | $29,600 | $31,723 | +7.2% |
| 2018 | $28,405 | $24,814 | -12.4% |
| 2016 | $27,815 | $25,522 | -8.2% |
| 2015 | $26,670 | $20,549 | -22.9% |
| 2014 | $26,075 | $19,568 | -25.0% |
These recommendations are based on CarGurus' proprietary market data from May 28, 2026, CarGurus experts' opinions, and generative AI.
