GMC Sierra

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 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.