Used 2015 GMC Sierra 1500 for SaleNationwide

Compare 2015 GMC Sierra 1500 Trims

The 2015 GMC Sierra 1500 offers a range of trims from budget-friendly options to fully loaded models, all featuring a capable V6 engine.

• Starting at $14,865
• Best MPG/MPGe: 18 city / 24 hwy
• Most Popular: SLE

Trim Overview

Prices updated weekly from CarGurus listings.

Quick Compare Table

Listing prices sourced from CarGurus — updated weekly. OEM specs from manufacturer data.

Missing data displayed as "—".

Trim Deep Dives

Base — "Who It's For"

The Base is the pick for shoppers who want essential features without paying for extras. It's an excellent choice for budget-conscious buyers.

• Avg. market price: $14,865 (updated weekly)
• MPG/MPGe: 18 city / 24 hwy
• Inventory: 617 listings
• View Base listings

SLE — "Who It's For"

The SLE is the pick for shoppers who want a well-equipped truck without going for the highest trim. It's the most popular choice in the lineup.

• Avg. market price: $20,088 (updated weekly)
• MPG/MPGe: 18 city / 24 hwy
• Inventory: 2,448 listings — widest selection in the lineup
• View SLE listings

Trim Recommendations

Most Popular — SLE

With 2,448 active listings, the SLE is the clear volume leader in the lineup.

Browse SLE listings

Best Budget Option — Base

At $14,865 avg market price — below the lineup median of $17,476 — it's the most accessible entry point.

Browse Base listings

These recommendations are based on CarGurus' proprietary market data from September 24, 2026, CarGurus experts' opinions, and generative AI.

How much does the 2015 GMC Sierra 1500 cost?

Prices have softened 7.95% compared to this time last year, making it a favorable time to shop this model year.

There are 2,061 listings available, which gives you a solid pool of trucks to compare.

Is the 2015 GMC Sierra 1500 a good car?

Generally — the 4.18/5 user rating and 7.33/10 expert rating point to a truck that lands well with shoppers. The model scores 8/10 across Form and function and Technology.

Owners consistently praise the strong performance, roomy interior, and impressive features, and many also like how it works as both a work and family vehicle. The overview backs that up with a smart cabin, mature exterior, and practical full-size pickup layout, so you’re looking at a truck that aims for usefulness without feeling bare-bones. With 27.0% of listings marked as good or great deals, the market still offers some room to shop selectively.

Is the 2015 GMC Sierra 1500 reliable?

Owners rate it 4.18/5, a solid signal of long-term satisfaction.

The owner summary points to a truck that many people find dependable in daily use, with strong performance and versatility helping it feel like something you can count on. The expert notes also describe a broad, practical powertrain lineup and a cabin built around common-sense usability, which supports the idea of a truck that should hold up well for regular ownership.

A standard 2-year scheduled maintenance program covering up to 24,000 miles helps reduce early ownership costs. For used buyers, the main long-term risk is that some listings may have hidden wear or mechanical issues, so a careful inspection matters.

What should I look for when buying a used 2015 GMC Sierra 1500?

At 63.4% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.

You should start with a vehicle history report and then focus your inspection on body condition, repair quality, and signs of uneven wear. Because this truck is often used for work, it’s smart to check for evidence of heavy towing, payload abuse, or neglected maintenance. A thorough test drive should also confirm that the truck feels composed and that all cabin and tech features work as expected.

Key things to evaluate:

• Trim level: The Sierra comes in one regular cab configuration and two 4-door cab options, with the Regular cab available with either a standard 6-foot-6-inch box or an extended 8-foot box. The Double cab is limited to a 6-foot-6-inch box, while Crew cabs can be paired with either a 6-foot-6-inch or shorter 5-foot-8-inch box. The cabin is functional and spacious, with three USB charging stations, multiple power outlets, a large center console with file-folder hangers, and a roomy back seat.
• Powertrain: You get a 4.3-liter V6 with 285 hp and 305 lb-ft of torque, a 5.3-liter V8 with 355 hp and 383 lb-ft, or a 6.2-liter V8 with 420 hp and 460 lb-ft. The V6 and 5.3-liter V8 use a 6-speed gearbox, while the 6.2-liter Denali gets an 8-speed transmission. The 6.2-liter feels a little overpowered, while the 4.3-liter does not deliver much fuel-saving advantage.
• Safety package: The truck includes optional lane-departure warning, front-collision alert, active seat rumbling, hands-free Siri integration, and a rear backup camera. The camera is especially useful because of the Sierra’s tall stance.
• Infotainment: The truck uses GMC’s IntelliLink system, which is easy to navigate, and it can be fitted with an 8-inch touchscreen. A 4G/LTE wireless hotspot is available with 3GB of free data before you have to pay for the feature.
• Fuel efficiency: The 4.3-liter V6 with 4WD is rated around 17 mpg city/22 highway, the 5.3-liter V8 with 4WD is rated 16/22, and the 6.2-liter V8 with 4WD is rated 14/20.

Which 2015 GMC Sierra 1500 trim should I buy?

The 2015 GMC Sierra 1500 is offered in 3 trim levels: base, SLE, SLT.

Here's the short version:

• base: This is the entry point, and it pairs with the 4.3-liter V6. It makes sense if you want the Sierra’s core utility and a lower starting point, but it is the least feature-rich choice.
• SLE: This is the best-value trim for many shoppers because it opens the door to the more popular 5.3-liter V8 while keeping the truck practical and well equipped. If you want the strongest balance of capability and everyday usability, this is the trim to focus on.
• SLT: This trim builds on the SLE formula with a more upscale feel and access to the same stronger powertrain choices. It suits you if you want more comfort and a more polished ownership experience.

The safety content points to a useful suite of optional driver aids, but they are not standard across the lineup, so check each truck carefully.

Is now a good time to buy a used 2015 GMC Sierra 1500?

The market looks moderately favorable if you’re a selective buyer.

• Deal availability: 27.0% of listings are priced as good or great deals.
• Inventory: There are 2,061 listings available.
• Price trend: Prices have softened 7.95% compared with last year.
• Clean inventory: 63.4% of listings are accident-free.

If you find a listing below $18,953, that's toward the low end of the year-round range and worth acting on quickly.

What is the 2015 GMC Sierra 1500's resale value?

The current average of $19,066 sits slightly below last year's $20,713.

That softer pricing suggests the truck has already absorbed some depreciation, which can help future resale if you buy at the right number. If you shop carefully and avoid overpaying, you may have a better chance of limiting your loss when it’s time to sell. Trucks with broad appeal and strong feature content tend to stay easier to move, especially when they’re well maintained.

Vehicles with solid owner satisfaction ratings, like this model year's 4.18/5, tend to retain buyer demand, which supports resale value over time.

Is the 2015 GMC Sierra 1500 safe?

The 2015 GMC Sierra 1500 earns a Good rating from the IIHS, including a Good rating in the moderate front overlap crash test, and it earns a five-star overall rating from NHTSA, including five-star ratings for frontal and side crashes and a four-star rating for rollover.

It earns a 7/10 safety score from our experts.

The available driver-assistance and safety features include lane-departure warning, front-collision alert, active seat rumbling, hands-free Siri integration, and a rear backup camera. The backup camera is especially helpful given the truck’s height and size.

Should I buy a 2015 GMC Sierra 1500 or consider a different year?

If you're weighing the 2015 against nearby model years, here's how to think about it:

Choose the 2015 if:

• 27.0% of listings are priced as good or great deals.
• At 63.4% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 7.95% compared with last year.
• Owners rate it 4.18/5 — a solid satisfaction signal.
• The 2015 keeps the smart cabin, mature exterior, and three-powertrain lineup that make this generation appealing.

Consider the 2014 if:

• At $16,495, the 2014 costs less than the current year's $19,066 average.
• Redesigned and more capable than its predecessor.

The bottom line: If you want the stronger all-around shopping case, the 2015 is the better target because it combines a softer price trend with solid owner satisfaction and broad market availability. If your priority is simply spending less up front, the 2014 is the value-oriented alternative to compare closely.

These recommendations are based on CarGurus' proprietary market data from September 29, 2026, CarGurus experts' opinions, and generative AI.