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Used 2015 GMC Sierra 1500 for Sale

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2015 GMC Sierra 1500 SLT

$30,998* 88K Miles

CarMax Newark Free shipping • DE to VA

Key Features
Bed Cover, 4WD/AWD, Leather Seats, Satellite Radio Ready, Parking Sensors, Rear View Camera
Location: CarMax Newark in Newark, Delaware 19711
Description: Used 2015 GMC Sierra 1500 SLT for sale - $30,998, 87,350 miles with Bed Cover, 4WD/AWD, Leather Seats, Satellite Radio Ready, Parking Sensors, Rear View Camera
Transmission: Automatic Color:Gray Interior Color: Black Average Vehicle Review: (4.933 reviews) get vehicle for first time teenager - gets great gas mileage, comfortable and we use it all the time to haul things.

About the 2015 GMC Sierra-1500

Vehicle Summary

If you do a lot of heavy hauling and towing, a full-size pickup truck like the 2015 GMC Sierra 1500 can really come in handy. And with this full-size truck, enjoying rugged performance doesn't mean sacrificing creature comforts. With several trims, bed lengths, cab sizes, and engine configurations to choose from, there's likely a 2015 Sierra 1500 model out there that suits your needs. Whether you're looking for something relatively simple like the base trim with its 4.3L V6 engine or prefer something with indulgent features like the top-tier Denali's built-in navigation system, heated/ventilated seats, and heated steering wheel—this truck has a lot to offer. 

Unless otherwise noted, information related to these featured vehicles comes from third-party sources, including manufacturer information. Product and company names may be trademarks™ or registered® trademarks of third-party entities. Use of them does not imply any affiliation with or endorsement by these entities.


Q: What is the towing capacity of the 2015 GMC Sierra 1500?

A: When properly equipped, the 2015 Sierra 1500 can tow up to 12,000 pounds.1

Q: What engine is in a 2015 GMC Sierra 1500?

A: A 4.3L V6 engine is standard on the 2015 Sierra 1500, although SLT and Denali trims are outfitted with a 5.3L V8. An optional 6.2L V8 is also optional on the SLT and Denali. 

Q: What kind of fuel economy does the 2015 GMC Sierra get?

A: Fuel economy can vary based on engine size and other factors. The 2015 Sierra 1500 base trim with 4.3L V6 engine, six-speed automatic transmission and front-wheel drive gets an EPA-estimated 18 mpg combined.2 Meanwhile, the 2015 Sierra 1500 SLT trim with 5.3L V8 engine, six-speed automatic transmission, and front-wheel drive gets an EPA-estimated 17 mpg combined.2

Q: How many people can the 2015 GMC Sierra 1500 seat?

A: The 2015 Sierra 1500 with crew cab can seat up to six people. 

Q: Does the 2015 GMC Sierra 1500 have a rearview camera?

A: A rearview camera is not standard equipment on the 2015 Sierra 1500, but it does come on the SLE trim and above. 

1Various factors may impact towing capacity, including weight of passengers, cargo, and options/accessories.

2Fuel economy figures are based on EPA estimates for when vehicle sold as new. Fuel economy may vary for reasons like driving conditions and vehicle history. Unless specified, figures are for vehicles equipped with an automatic transmission. See

Generation Overview

The 2015 GMC Sierra 1500 was released in the middle of this truck's third generation of production (2014-2018). When this generation debuted in 2014, it brought with it new upgrades like a revised suspension and additional driver-assistance features (like lane-departure, forward-collision warning, and more). 

GMC Sierra 1500 Engine Options

A 4.3L V6 engine at 285 hp is standard on the third-generation Sierra 1500, as is a six-speed automatic transmission and front-wheel drive. Four-wheel drive is optional on every trim. 

On the SLT and Denali trims, a more powerful 5.3L V8 engine at 355 hp is standard equipment, though this V8 engine is optional on other trims. Also optional on the SLT and Denali trim exclusively is a 6.2L V8 engine rated at 420 hp. 

GMC Sierra 1500 Cab and Bed Sizes

Three cab sizes are offered on the third-generation Sierra 1500. The standard cab is a regular cab with a single front bench seat, which can hold up to three passengers. Need more passenger space? Consider the double cab (which seats up to five) or the crew cab (which seats up to six and offers larger rear doors). 

Three bed lengths are available on the third-generation Sierra 1500: a five-foot-eight-inch short bed, a 6.5-foot standard bed, and an eight-foot long bed. 

GMC Sierra 1500 Trim Configurations

Which Sierra 1500 trim best suits your needs? Explore the main features of each trim to find out, keeping in mind that these are specific to the 2015 model. 

Base (2014-2018)

  • 17-inch steel wheels 
  • Chrome grille and bumpers 
  • Rubber floor covers 
  • Four-speaker sound system 
  • Power windows and locks 

SLE (2014-2018)

  • Tinted glass 
  • 17-inch stainless steel wheels 
  • Available OnStar® functionality with 4G LTE Wi-Fi capability (when activated)3 
  • Leather-wrapped steering wheel 

SLT (2014-2018)

  • 18-inch alloy wheels 
  • Chrome exterior trim accents 
  • Automatic dual-zone climate control 
  • Leather upholstery 
  • Heated front seats with power adjustment 

Z71 (2014)

  • These features are specific to the 2014 model: 
  • Upgraded shock absorbers 
  • Hill-descent control 
  • Cabin air cleaner 
  • Recovery hooks 

Denali (2015-2018)

  • 20-inch wheels 
  • Side-assist steps 
  • Built-in navigation system 
  • Heated and ventilated front seats 
  • Heated steering wheel 

3 OnStar features require activation and most require a paid OnStar plan to use. Wi-Fi hotspot functionality may also require an additional data plan. Limitations and restrictions apply. See for more information.

Safety Rating

The National Highway Transportation Safety Administration's independent crash tests help you make informed decisions about vehicle safety. NHTSA's 5-Star Safety Ratings give consumers insights into how vehicles perform in crash tests, with more stars equaling higher safety ratings. Here are the ratings for the 2015 GMC Sierra 1500. Certain vehicles may have unrepaired safety recalls. Visit to look up a specific vehicle.

NHTSA Overall Rating
Frontal Barrier Crash Rating Test: A head-on collision between two similar vehicles traveling at 35 mph.
Front Driver Side
Front Passenger Side
Side Barrier Crash Rating Test: A vehicle standing in an intersection sustains driver side impact from a vehicle moving at 38.5 mph.
Rear Passenger
Side Pole Crash Rating Test: A vehicle slides sideways at 20 mph and impacts a tree or telephone pole.
Combined Side Barrier and Pole Crash Ratings: Test data is combined to indicate overall safety by passenger location.
Front Seat
Rollover Resistance Test: A single vehicle moving at 55 mph loses control on a curve, leaves the road, and rolls over.
Rollover Rating
Dynamic Test Result
No Tip
Risk of Rollover

Reviews for 2015 GMC Sierra 1500

Overall Rating

5.0 out of 5(13 reviews)

Reliable and a fair price!

Great comfort. Solid exterior. Good mileage.

- A P, 2015 GMC Sierra 1500

Teenagers First Truck

get vehicle for first time teenager - gets great gas mileage, comfortable and we use it all the time to haul things.

- Michelle Pickett, 2015 GMC Sierra 1500

Great Truck

Its a well built truck that rides like a high priced car & is very quiet and comfortable to drive on long trips.

- Rod Stokes, 2015 GMC Sierra 1500

This price does not include tax, title, and tags. Additional fees may also apply depending on the state of purchase.