Used 2015 GMC Sierra 1500 for Sale nearModesto, CA

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.

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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 7.17% compared to this time last year, making it a favorable time to shop this model year.

There are 2,057 listings available, which suggests you have a solid amount of inventory to compare.

Is the 2015 GMC Sierra 1500 a good car?

Generally — 4.18/5 from owners and 7.33/10 from experts point to a truck that lands well with shoppers. The model scores 8/10 across Form and function and Technology.

Owners consistently praise its strong performance, roomy interior, and impressive features, and many also like its versatility as both a work and family vehicle. That lines up with the overview’s focus on a smart cabin, mature exterior, and practical full-size pickup packaging. The main tradeoffs are fuel economy and some reported mechanical concerns, so it fits you best if you want a polished truck feel more than maximum efficiency. 27.2% of listings are priced as good or great deals, which gives you 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 feedback also points to a truck that many people find dependable and trouble-free in everyday use, with strong confidence in its long-term usefulness. Expert commentary reinforces that impression by noting a recent dependability survey that awarded the Sierra 1500 top honors among its competition. A standard 2-year scheduled maintenance program covering up to 24,000 miles adds some ownership reassurance early on.

For used buyers, the main long-term risk is that some examples may have mechanical issues, so condition and service history matter a lot.

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

At 63.5% 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 prioritize a pre-purchase inspection, especially if the truck has higher mileage or a long option list. Focus on signs of prior body damage, uneven panel gaps, and any evidence of deferred maintenance. Because this is a full-size pickup with multiple configurations, you should also make sure the specific truck you’re considering matches the equipment and cab/bed setup you want.

Key things to evaluate:

• Trim level: The Sierra comes in one regular cab configuration and two 4-door cab options, with different bed-length pairings that affect how practical the truck feels for work or family use. The interior is described as functional and spacious, but the base setup is more businesslike than luxurious, so you should check whether the truck has the comfort and convenience features you want.
• Powertrain: You can choose among a 4.3-liter V6, a 5.3-liter V8, and a 6.2-liter V8. The V6 is the efficiency-minded starting point, the 5.3-liter V8 is the middle-ground choice, and the 6.2-liter V8 delivers the most power but can feel overpowered for some buyers.
• Safety package: Optional safety systems include lane-departure warning, front-collision alert, and active seat rumbling. A rear backup camera is also highlighted as especially useful, so make sure the truck you’re considering has the driver-assistance equipment you want.
• Infotainment: The truck features an easy-to-use IntelliLink system, and the cabin can be equipped with an 8-inch touchscreen. It also offers a 4G/LTE wireless hotspot connection 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 and 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. The V6 and 5.3-liter V8 also use cylinder shutdown, but the fuel-economy gains are described as minimal.

Which 2015 GMC Sierra 1500 trim should I buy?

The 2015 GMC Sierra 1500 is offered in 4 trim levels: Sierra, SLE, SLT, Denali.

Here's the short version:

• Sierra: This is the starting point, and it comes with the 4.3-liter V6. It makes sense if you want the most straightforward entry into the lineup and plan to keep the truck focused on basic utility.
• SLE: This is the best-value trim for many shoppers because it adds access to the more popular 5.3-liter V8 while staying below the luxury end of the range. If you want a balanced mix of capability and everyday usability, this is the trim to target first.
• SLT: This trim also offers the 5.3-liter V8 and is aimed at buyers who want a more upscale feel without jumping all the way to the top. It suits you if you want more comfort and features while still keeping the truck broadly practical.
• Denali: This is the top-shelf choice, and it brings the 6.2-liter V8 plus the most upscale equipment. It’s the right pick if you want maximum power and a more premium cabin experience.

The safety content highlights optional driver-assistance systems rather than a trim-specific standard suite, so verify the exact equipment on any truck you’re considering.

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

This looks like a moderate, selective buyer’s market, so you can shop carefully and still find worthwhile options.

• Deal availability: 27.2% of listings are priced as good or great deals.
• Inventory: There are 2,057 listings available.
• Price trend: Prices have softened 7.17% compared with last year.
• Clean inventory: 63.5% 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 $19,150 sits slightly below last year's $20,629.

That price movement suggests the truck has softened enough to create a better buying window now, but it also means future sellers may need to price competitively to stand out. If you buy well today, you may have a better chance of limiting depreciation pressure later. Trucks with strong owner satisfaction tend to hold demand better, and this model’s positive owner feedback helps support that.

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 earned a Good rating from the IIHS, including a Good rating in the moderate front overlap crash test, and it earns five-star ratings from NHTSA overall, 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 safety content also points to optional lane-departure warning, front-collision alert, and active seat rumbling, plus a rear backup camera that is especially helpful in a tall truck like this. Because those systems are optional, you should confirm whether the specific listing includes them. The main caveat is the four-star rollover result, which is worth keeping in mind if safety is a top priority.

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:

• 27.2% of listings are priced as good or great deals.
• At 63.5% accident-free, a meaningful share of listings has prior incidents — history verification is especially important.
• Price trend: Prices have softened 7.17% compared with last year.
• Owners rate it 4.18/5 — a solid satisfaction signal.
• The 2015 stands out for its smart cabin, mature exterior, and three-powertrain lineup.

Consider the 2014 if:

• At $16,716, the 2014 costs less than the current year's $19,150 average.
• It is described as a major redesign that brought a more polished, capable, and safer full-size pickup.

The bottom line: If you want the better current-market value and a truck with strong owner approval, the 2015 is the primary path to consider. If your budget is tighter and you want to spend less up front, the 2014 is the better price-sensitive alternative.

These recommendations are based on CarGurus' proprietary market data from September 22, 2026, CarGurus experts' opinions, and generative AI.