GMC Sierra

GMC Sierra Reviews

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About GMC Sierra

The GMC Sierra is a full-size, heavy-duty pickup truck. Read more General Motors reviews to learn about other models.

GMC Sierra Reviews

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    How do I know I can trust these reviews about GMC Sierra?
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    • We use intelligent software that helps us maintain the integrity of reviews.
    • Our moderators read all reviews to verify quality and helpfulness.
    Page 1 Reviews 0 - 10
    Customer ServiceStaff

    Reviewed April 5, 2024

    We bought a GMC Sierra and the vehicle quit on us two times and the third time it quit it was in our driveway and a service Truck from Bull Motors where we bought the vehicle came a loaded the vehicle and to it to Wynne Arkansas and it has been there for over two weeks. Some lady named Laka from GM called me today and told me she would be waiting for 14 days to see why the fuel pump has been on back order. I went online and found the pump myself. I told the lady from GM that I found the pump online and because it is taking this long for them to get the pump I probably won't be buying GM anymore and if they do not get the pump ASAP after it has been up in Bull motors for two weeks, they have just about lost a customer in the future.

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    Reviewed Feb. 14, 2024

    I'll start right from the beginning. First issue was with the truck lurching when putting it into Drive. Took it to the Welland Dealership and no issues found. 2nd Issue. Three times I had to take the truck in to get the radio replaced, the screen kept going black. On the third trip back to the dealership they finally replaced the Radio. 3rd Issue. Right side bank needed new lifters, Replaced them. 4th issue. Left side bank needed new lifters. 5th Issue. I've taken the truck back for service engine light flashing, nothing was done. 6th Issue. The truck is back in the Welland Ontario Dealership getting another set of lifters done on the right bank of the engine. Keep in mind this is a 2021 GMC Sierra Truck. Where is the Quality????

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      Customer ServicePriceStaffProcess

      Reviewed Nov. 15, 2023

      We held off on writing this review because we didn’t want it to be colored by wild emotions. But we are both feeling so taken advantage of that I think it’s time to share our experience. After spending a long 12-hour day driving from New York to Ohio we noticed a problem with our GMC Sierra truck and knew that it was something that needed to be handled by a professional. With a quick google search we found Perrysburg Automall and called to see if we could get an appointment and he (John E.) said “come on in”.

      We pulled in on Wednesday at noon and crossed our fingers that it wouldn’t be a big issue and we’d be on our way soon. A mechanic took a look and decided that it must have been bad DEF and suggested that we would need to have the DEF tank dropped and drained at a cost of $600. That was not the fix and on Thursday he said that we needed to replace a NOx sensor, at a cost of $700. That also did not solve the problem.

      On Friday the service manager said that they had reached out to GM tech support and were waiting for feedback from them. I asked if their mechanics ever worked on Saturdays. He replied sometimes, but I found out that he did not come in that Saturday to work on our car. Until this point we were stranded in our travel trailer in the parking lot of the dealership when it occurred to us that most dealerships offer a loaner car when your vehicle is in for servicing, so we asked and we were able to have a loaner car. So glad that we asked because it was not offered.

      On Monday the dealership heard back from GM tech support who suggested that we would need to replace the diesel particulate filter at a cost of approximately $3000. They also mentioned that the part would be hard to find as their initial search revealed nothing. The service manager said he would be back in touch with us by Thursday, either way. On Wednesday my husband called to check in with John. No luck, and it may actually take two weeks to get the part. At this point we were waiting for an entire week.

      When we got this bit of news, we decided to call customer service at GM. It doesn’t make any sense to us that a car manufacturing company would not be able to help find a needed part to make a repair to one of their own vehicles. The customer service department was not able to help us find the part either. That evening we were telling the tale of our bad luck to the campground supervisor and she mentioned that there were great diesel mechanics in a nearby town called Findlay.

      The next day we called two different car dealers in the Findlay area asking for their help to find the needed part. One of them gave us the name of a dealer that was quite helpful and gave us the number for another dealer to try. We called this dealer and were very pleased to find that they had one in stock. We got all the details and planned to drive right there to pick it up. My husband called John back to tell him we found the part and we would go pick it up in our loaner truck, John responded by saying the dealership didn’t like their loaner vehicles going on long trips, it was an hour each way! When I called John, he said he found the part! He did not, I found the part! It’s not a game and we were both quite disheartened that John found it necessary to lie about the situation.

      The part was in hand for the mechanic to get it all repaired and by 11:30 Friday morning it was complete. Unfortunately, the service manager was not working that day so we wouldn’t see him, but he had our keys and paperwork so we had to wait for him to drop them off at the dealership. We were told to come in at 2:00. Amazing that even after waiting 10 days for our repair to be completed the service manager still needed to hold us up by making us wait. And why were the keys not at the dealership in the first place? The cashier asked when we paid our invoice if we would like to sign up for the GM Rewards program. We figured yes since we will need a new car sooner rather than later. Even though we took the time and gave all of our information, through the acts of the cashier, we were never enrolled in the program.

      John had told us that since those other repairs had been made and not been the actual issue that he would work with us on the price of the repairs in total. When we went to retrieve our car and pay the bill there was no such allowance. In addition, there was a $400 core charge added to the bill but not cancelled out with the expectation of returning the bad part. We only knew about this because we had found the part and that dealer had mentioned it to us.

      To add insult to injury we left the dealership with a bolt stuck in one of the truck tires that needed to be removed and repaired. In addition, even though there was a car wash at the back of the dealership our car came back to us filthy dirty. We have been speaking to a customer service representative named Troy who has been very friendly and understanding but unable to offer any type of good will. This has been one of the worst experiences of our lives!

      Reviewed Sept. 7, 2023

      I went in for high mileage services and oil pan gasket replacement. Upon arrival inquired if a veterans discount was offered. I was told that USAF doesn't count. Also I requested the oil pan gasket be replaced. It was leaking. I not only was disrespected for my military service but I was charged for a oil diagnostic and 2 oil changes. The transmission filters weren't mentioned or replaced with the "transmission service" and they were stock, so my truck is a 2015, 8 years old on those filters should be addressed.

      After service I got in the truck and saw a broken switch in the armrest. They didn't even mention that they broke the switch. The total bill was over $3000 for gear oil and oil pan gasket. I questioned the billing and services. So it's been 3 weeks and still no refund for double billing and the diagnostic charges. The gasket replacement itself was $1000, my truck is lifted 10 inches and no skid plate, literally 6 inches between it and the cross member. Btw, not a gasket replacement just sealed with goop. This place is a ripoff! I will be shopping for a new vehicle soon.

      Reviewed Jan. 13, 2023

      I bought a new 2017 GMC Sierra. I noticed some irregularities with the transmission at times while driving. Specifically the truck would plunge forward while braking on a hill. The plunge was significant and I took the truck in a few times to the dealership. They claimed that they needed to reset the computer and the problem should work itself after driving. Unfortunately, the problem persisted and now I was told I needed a new transmission. But since the warranty had expired passed 67,000 miles I was responsible for the entire cost of replacement. I later found out that other Sierra owners experienced the same issues. I have bought 4 GMC vehicles but will never buy another GMC product again.


      Reviewed Feb. 28, 2022

      Between the transmission vibrating and shifting hard to a point where starting to drive slams into gear and is dangerous in a way that may launch you and your vehicle into danger. To the trained mechanics saying, "I see no problem", to the power running boards not working on either side after being fixed twice, to the phone app not working correctly or the half dozen sensors going off and setting off the alarm and killing the battery completely dead, to where a tow truck has trouble jump-starting it. Just poor quality either from the union workers with no pride or skill to the company trying to pinch a penny for their own pockets. I will never buy another GM product again.

      Reviewed Oct. 13, 2021

      I traded in a 2015. That Sierra had wonderful front bucket seats and the back seats weren't too bad. But the 2020 truck has the hardest back seat and the bucket seats are medium hard. I sometimes drive 6 hours in a day and I'm so painful when I finished.

      Customer Service

      Reviewed Oct. 6, 2021

      I was on the phone for over an hour checking the order status of my new truck. All I got for a hour was representatives assisting other customers. Your call is very important to us. Yes The worst customer service I’ve ever experienced. I’m canceling my order.


      Reviewed Aug. 25, 2021

      I own a 2014 GMC Sierra piece of garbage. 19 recalls +! on this vehicle. (Check out NHTSA. Probably more by now.) They stopped servicing my recalls at 70,000 miles. Great. Could be safety issues that they refused to address due to having so many recalls on one vehicle. Then my transmission fell apart at 150,000 miles. That was $5500. And now my rocker panels have rusted through and need to be replaced.... $4400... for a 7 year old vehicle!! My neighbor's 1974 Ford pickup has perfect rockers and it sits outside all year every year. I will never buy another GM product.. and my father worked at GM for 43 years. What pathetic engineering to have such a defective vehicle. I have had Jeeps that were 15 years old that never had one issue, other than replacing brakes and tires. My next truck will be a RAM. Yours should be too, or a Toyota, or a Ford, or anything other than a GMC....


      Reviewed Aug. 19, 2021

      Horrible experience with a very expensive truck. 3 failure for same crap... trying to get GMC to replace the truck. Never in my life have I owned a more problematic auto. Stay away from GMC! They are producing unreliable vehicles that takes months of downtime. I have stage 4 cancer and this is the last stress I need!!!

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      GMC Sierra Company Information

      Company Name:
      GMC Sierra