Truck-lovers have favored the GMC Sierra since its initial release in 1962 and 2003. 

Since 2003, it has been a staple in the GMC line.

However, what are the most reliable years for the GMC Sierra?

What are the Most Reliable Years for the GMC Sierra?

The most reliable years for the GMC Sierra are 2010-2012, 2014, and 2015. The 2010, 2011, and 2012 GMC Sierras each received a 5 out of 5-star reliability rating from J.D. Power. The 2014 and 2015 GMC Sierra models received a 4 out of 5-star reliability rating from J.D. Power.

Although many GMC Sierras are reliable, there are a few years where the released models were not reliable. 

More information about the least reliable GMC Sierras is below.

The Most Reliable GMC Sierra Years

The most reliable GMC is the 2012 model. 

It has a 5 out of 5-star reliability rating from J.D. Power and is a couple of years newer than the 2010 and 2011 GMC Sierras. 

It also received an overall score from U.S. News of 8.9 out of 10, which is abnormally high.

The 2012 GMC Sierra gets up to 403 horsepower and seats up to 6 people at one time.

It gets up to 15 miles per gallon in the city and 22 miles per gallon on the highway.

The interior of the 2012 GMC Sierra is luxurious for most trim models and made of high-quality materials.

There is plenty of legroom in the back seats for even the tallest adults to be comfortable while sitting in them. 

Although it doesn’t have many modern features seen in most cars released in recent years, it has an AUX input and satellite radio.

The 2011 GMC Sierra received a 5 out of 5-star reliability rating from J.D. Power and an overall score of 9 out of 10 from U.S. News, higher than most vehicles.

The 2011 interior uses high-quality materials and includes a CD player, air conditioning, and a stereo.

You can add other features such as heated leather seats, a heated steering wheel, a backup camera, a sunroof, and a back-seat entertainment system.

Since 2011 GMC Sierras are no longer in production, you’ll have less control over the features included in the model.

The 2011 GMC Sierra gets up to 15 miles per gallon in the city and 22 miles per gallon on the highway. 

This model has the same amount of horsepower as the 2012 model.

The 2010 GMC Sierra also received a perfect 5 out of 5-star reliability rating from J.D. Power. The seats are comfortable, and the engine is quite powerful. 

It gets the same gas mileage and horsepower as the 2011 model.

However, it is slightly older and will likely have more miles.

Although 2010, 2011, and 2012 GMC Sierras are the most reliable years for the lineup, the 2015 GMC Sierra also has a high-reliability rating. 

It received a 4 out of 5-star reliability rating from J.D. Power.

The 2015 GMC Sierra has a WiFi hotspot available, and this is the first model of GMC Sierra where it is available. 

The available engines options are powerful, and the truck is easy to control.

The 2015 GMC Sierra gets up to 18 miles per gallon in the city and 24 miles per gallon on the highway. 

It has up to 420 horsepower and scored an overall 8.5 out of 10 from U.S. News. It also received a perfect 5-star overall safety rating from the NHTSA.

What are the Most Reliable Years for the GMC Sierra 1 What are the Most Reliable Years for the GMC Sierra?

The Least Reliable Years for the GMC Sierra

Although many GMC Sierras are reliable, a few models are not as reliable. 

This is determined by the low-reliability scores they received from J.D. Power.

The least reliable GMC Sierra is the 2013 model.

It received only 2 out of 5 stars when judged for reliability by J.D. Power. Surprisingly, when it was first released, it received a 4.5 out of 5-star reliability rating.

However, it needed immediate repairs, so the reliability rating changed drastically.

The 2013 GMC Sierra gets up to 15 miles per gallon in the city and 22 miles per gallon on the highway. 

In the cabin, there is an AM/FM radio, cruise control, a touchscreen navigation system, and a back-seat entertainment system to keep children occupied during long road trips.

The 2019 GMC Sierra is the second-least reliable GMC Sierra. 

It received a 3 out of 5-star reliability rating from J.D. Power, and this model year is more reliable than the 2013 Sierra model.

The 2019 GMC Sierra has a variety of available safety features, but only a rearview camera and Teen Driver settings are standard.

This GMC Sierra received an overall safety rating of 4 out of 5 stars from the NHTSA.

It gets up to 20 miles per gallon in the city and 24 miles per gallon on the highway. 

The engine has up to 420 horsepower.

The interior of the 2019 GMC Sierra is spacious and has an easy-to-use infotainment system not included in other previous models.

The 2018 GMC Sierra received a 3.5 out of 5-star reliability rating from J.D. Power

Although it received an average reliability score, it scored a perfect 5 out of 5-star safety rating from the NHTSA.

The 2018 GMC Sierra comes with a rearview camera, 7-inch touchscreen, and a variety of safety features that you can add. 

The interior of the cabin is roomy and almost luxurious.

The 2018 GMC Sierra gets up to 18 miles per gallon in the city and 24 miles per gallon on the highway. 

This model’s engine gets up to 420 horsepower. 

Surprisingly, it was ranked the second-best full-sized pickup truck released in 2018 by U.S. News. 

However, that ranking is partially because of the high safety rating and the quality of the interior materials.

The GMC Sierra is a great truck, but the reliability rating fluctuates every year.

In summary, avoid purchasing a 2013, 2018, or 2019 GMC Sierra. 

These model years received low-reliability ratings and are unlikely to last as long you need them.

Since these are expensive trucks, it is important that they can endure the years.

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