GMC Sierra Reviews

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.

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.

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.

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.

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....

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!!!

My 2021 GMC Sierra Denali 1500 had to have new lifters ordered at 5000 miles. I had a complete engine failure on a brand new vehicle purchased in February 2021. I’m now waiting on the dealership to get back with me on the status and estimated completion because they can’t give me a loaner and they have no idea when I’ll get the vehicle back.

Bought a new truck. Parked it in driveway. Truck engine caught fire and destroyed truck. GMC 2021 Sierra. Dangerous truck. It can explode in fire ball without notice. GM does not care. A few minutes earlier and I would not be here to write review. GM CEO does not care.

I leased Denali Sierra 1500 and it started vibrating on the road at 60 mph. What I learned these vehicles and the Silverado have this defect. You can Google or YouTube it. It's a nightmare when it happens. GM can't fix it & the dealer makes you pay for all these procedures & new tires to no end. I had to take McGuire GMC to court. If this happens you can take them to small claims. It only costs $70 to file, you don't need a lawyer if you're claiming up to $15,000. I'll never buy a GM truck again.

I purchased a GMC Sierra. I purchased a GMC Sierra. 2013 SLE, one owner with 80,000 miles. I've had this truck for little over a year. Regularly scheduled oil changes and have even had a tune-up done. One day last week I was driving the truck and the engine begin to tick. I took the truck to my local mechanic where he said what everyone else has said, the motor is junk. I have a lifter ticking as well as a rod broken. The engine is toast and GM is telling me that I have to move a vehicle that is not drivable to a GM dealer, unbelievable. GM customer service immediately asks for the VIN number so that they can look and immediately remove all fault from GM and place the blame on the customer. They will immediately tell the customer that its an out of pocket expense.

I recently passed 50,000 miles on my pickup. It is just out of warranty. The air conditioner condenser went out and when they were fixing that they showed me the radiator that is leaking and has to be replaced. I have religiously maintained this truck at the dealer, most of the miles are freeway miles and I have towed things about 6 times in the life of the truck (mostly just a two horse trailer with one horse in it). I have owned many trucks over the years and have never had problems at 50,000 miles before. I was told by the dealer that these things can fail at any time. If that's true I sure am not going to buy another.

My 2019 Sierra has been at the dealer for 9 weeks. They disassemble the front differential and does not have parts. As of this date GM cannot tell when the parts will be available. Life long gm owner, but stay away. You have been warned.

I bought a 2019 GMC Sierra Denali 1500 on October 31 and only drove it until December 11 and then got a check engine light and I took it back to the dealer and they said that it was a battery problem so we change the battery and then not even 30 minutes later we took it back because there was no brakes and all the lights came on on the dash. Until this day the truck is still in the dealer and I’m making payments while it's still the dealer. I was headed to Wisconsin when this incident happened and I had to turn around and cancel my vacation because of this. I don’t think this is right because it is a 2019 vehicle and I only got 1500 miles on it. I don’t think a 2019 vehicle should be doing this.

I like my GMC Sierra pickup truck. There have been a number of recalls on it but the dealership takes care of them. Even with it being 5 years old with almost 100k miles it still looks and drives great, and is very comfortable for long trips. Other than the recalls and a defective condenser on the air conditioning system I haven't had any repair issues yet.

I bought a 2019 fully loaded Sierra Denali 1500 for $72,000. I have had it since May 2019. My dealer is amazing and have tried to resolve my issues. I have a number of issues happening.

I have had 2 Sierras and would not take anything for them. If it was not for the first one my wife and I probably would not be here. We were in an accident because of a guy running from the police and ran a red light, hit another truck that hit us head on. The accident killed the driver that he hit. My truck was a 2013 and was totaled. I also like the way that the truck handles and rides.

Before you buy any GM car or truck, Google "Chevy shake." After about 16 months of owning a brand new GMC Sierra, there was a shake/shutter/vibration throughout the cabin. This is happening on several models, not just mine. GM is not acknowledging the problem, or just covering it up by saying it falls into their standard or specifications. GARBAGE! Do not buy ANYTHING from them without doing your research. I will be posting their emails that they responded with stating that this is their "standard" for $40,000+vehicles.

I chose the 2017 GMC Denali 2500HD Duramax over the Ram truck even though it was much more. I made a poor choice, this truck is the worst $70K I've even spent! Transmission issues, electrical issues and the manufacture could care less. Filed a lemon lawsuit and they tried to tie it up in court, I settled for much less. I cannot even sell the truck at its value. I will never buy GMC again!

The 2015 GMC Sierra SLT is an extremely comfortable, stylish pickup. It’s sturdy and well made. The doors have extra seals that keep out sound. The standard rims are catchy. The options are much more than expected from a pickup. From heated steering wheel to air conditioned seats, 10 cup holders and lots of room for our big guys to stretch out. Far reclining seats and Bose stereo are impressive. Small touches like pea size light enough to read by without having to turn lights on. Exterior lights and inside lighting are well thought out and attractive. Very pleased. Very blessed to have it.

This is a great truck. Have over 126,000 miles and everything works just like the day I bought it 12+ years ago. Decent mileage for a 3/4 ton 4 wheel drive that spends a lot of time on back roads. Change oil every 7500 miles with Rotella T4 15W 40.

57,000 dollars truck. (gfx model) The rims had to be replaced within less than 2 years due to rust. Numerous recalls. There was a brake system recall which I was disappointed cause my brakes fail once before been aware of recall. For a pricey truck I believe shouldn't have all those recalls.

DO NOT PURCHASE GM PRODUCTS. I purchase a new 2020 GMC Sierra 1500 AT4 a month ago and it is now in the shop for the second time. It has been in the shop for over two weeks and in all, it has been in the shop for roughly three of the four weeks I have owned the truck. Since I need my truck to work, I am now losing income while at the same time I am making payments on a truck that is in the shop. To make matters worse, the GM Corporation has repeatedly cancelled my parts order with no explanation as to why it did so. Worst of all, despite repeated requests, the GM Corporation will not do anything to make me whole in terms of the financial losses I have incurred as the result of the corporation's poor quality control.

Brand new 70,000 dollar Gmc Sierra Denali 3700 miles. Loud lifter noise. Never made it to the first oil change. Now they have to tear down the whole engine. Been a GM man my whole life. Saved and worked to get this truck and this is how it is. Maybe it’s time to change.

We are retired and have had superb service from our 2014 GMC Sierra extended cab 4x4 that was purchased new. Recently completed a 5000 mi road trip through Canada over some rough roads. The truck is quiet and comfortable and has had no mechanical issues. Very satisfied with our purchase.

2003 GMC Sierra - Bad Brakes. Been in two rear collisions because the brakes are weak, had every brake component replaced including lines and hoses and brakes still feel the same. I've read from many others that this is an issue they tried to blame on salty roads rusting the lines but I can assure you even with brand new lines they are no different. Truck sits in the driveway and I'll be buying a Dodge Ram when it comes to my next truck because this one I'm scared to drive and I have thousands of dollars invested in keeping it maintained and replacing poorly designed parts that were redesigned after everyone had issues at our expense.

At 9600 miles my 6.2 motor blew up and almost ended my life while traveling at highway speed on cruise control, in heavy traffic, on the NYS Thruway. Luckily it didn't lock up or I might not have survived. 18 days later a new 6.2 engine direct from the factory was installed. The very day I picked it up, the second stop I made it wouldn't start. 34 consecutive days later without my truck, I finally get it back after starter was replaced, fuel lines, fuel pump, and cam actuator. 3 days later, truck stalls out again at highway speeds and won't start!! GM does nothing but refer me to my dealer who have been great. I had a start issue with my 2017 Chevy Silverado at 30k (4 different times), never resolved. Why I'm here. Why am I here??!! New 2019 loaner truck with 2k on it and the service 4WD light is on!!! Been GM for over 30 years and I don't have a choice but to move on from all this. BUYER BEWARE!!! Oh, PS, truck is still in shop. GM won't even talk to me anymore.

I bought a 2008 Sierra new in 2008. It now has 163000 mi on it. A ticking noise developed on acceleration. I took it to the dealer and was told it had a bad cam. $5300 to repair or $7750 for a new engine. They charged me $139 for this bogus info. I knew it did not have a bad cam. I took it to an independent service dealer. He told me it had a faulty active fuel management.. (runs between 4 and 8 cylinders). Told me to disable it. He did not charge me for this info. I disabled it and it runs better than new. Talked to GM customer service, they didn't do anything except lip service. I just wanted my $139 back for telling me erroneous diagnose. In the last 52 years I have bought 22 GM vehicles. Never again!

I bought my 2014 GMC Sierra on 2017 with 20k miles on it. Within a month I noticed that the paint was peeling in the bed of the truck. I bought it to the dealership and because it was still under warranty they repainted it for me. About six month later I notice the paint was bubbling off the doors. Took it back to the dealership and neither the dealership or GMC would assume any responsibility financially. (Warranty was expired). I had to spend over $1,000 to get my doors repainted. Within several month of me getting the doors done the paint is bubbling off of the roof and around my windows. I know there are many people who are having this same problem with this particular year GMC and Chevy.

Have had new GM trucks since 2010. A new one every year, brand new truck drove off lot and Have had the 8 sp shutter in trans ever since, driver's seat has a bad spring which makes terrible noise. Finally got fed up now. Has 5000 miles. GM will not warranty and repair seat, reprogrammed trans and made the problem worse. GM is losing a customer. I'm going to go to a Ford. It's sad when you buy a truck that cost almost 60k and this is the quality of product you get.

I was nearly killed on the job as an Inspector on a Highway project when I tried to pull out of my lane closure and the drive train and/or brakes locked up on me after accelerating above 5 mph. The dealer is unable to find and fix the issue. Don't drive any of the 2019 GMC pickups for extended periods and/or leave in idle. Unfortunately for me for my job I need to do just that. I am now terrified to drive my truck and it is only a matter of time before I am involved in a serious accident.