The truck shuts off while driving which disables the power steering, engine and power braking. The electrical systems seems to reboot and turn back on after a second or two. This also happens occasionally while driving at slower speeds and turning the steering wheel or after hitting the turn signal. I have had the entire electrical system and engine shut off while doing 50mph on the high just because I turned my turn signal on. This happens every 4 weeks or so. You can tell it is about to happen when the headlights start deeming when tapping the brakes or using the turn signal. It usually happens when the truck is in motion. It has happened in all temperatures. After it happens the console states "stablitrak is disabled".

- Hockessin, DE, USA

I own a 2014 GMC Sierra and the air conditioning condenser has gone out. This should be a recall since so many GMC & Chevrolet are having the same problem and no help is being offered to us. What a disappointment from GMC. If I would of been notified of this defect I would have never purchased these truck. Now I'm driving around in 110 degrees with my little son. Recall and fix this.

- Riverside, CA, USA

My vehicle turned completely off and it put my breaks to the floor at 26 mph. My steering locked also as if I turned it off. Prior to this happening 3 months my steering column has a popping feeling. Not noise. Feeling. When I took it to the shop, they read the code and it said something along the lines of communication error. Dealership couldn't find anything wrong, took apart steering column nothing was loose and popping stopped also had battery replaced 7 months prior and no bad connections. Received my truck back, was good until a week ago the popping feeling, is back.

- Sioux City, IA, USA

Radiator has micro-holes which leaks coolant. Engine code P0455 with no GM mechanics able to find a solution to the engine code.

- Topeka, KS, USA

Radiator is leaking from the top with only 67,000 miles and transmission shifts hard and when U let off gas while driving about 55 the rpms go down to idle then start bouncing up 500rpms then back down. Then eventually will find a gear to go

- Richmond, VT, USA

Vehicle radiator has leak at 86K miles. There is known issue w/radiator and thermostat in this truck leading to tsb 15829. My truck has the same engine/drive-train/cooling system, but the year of the tsb only applies to ld models. GMC will not cover repair costs. GMC dealer quoted me $2900 for repair.

- Evergreen, CO, USA

Began running rough bad lifters. Also interior is beginning to rust. Hheadlights are terrible it aka nearly impossible to see.

- Beech Island, SC, USA

The contact owns a 2014 GMC Sierra 1500. The contact stated that the vehicle stalled after depressing the accelerator pedal without warning. The contact took the vehicle to simpson Buick GMC of buena park (6600 auto center dr, buena park, ca 90621) for an oil leak and the gasket was replaced. Afterwards, the vehicle would shudder when reversing at a low rate of speed. There were no warning indicators illuminated. The contact took the vehicle back to the dealer to be serviced; however, the failure could not be duplicated. The manufacturer was notified and did not assist. The vehicle had not been repaired. The failure mileage was 408.

- Victorville, CA, USA

Intermittent stalling, ( complete shut down at freeway speeds). No engine, no power steering or brakes, windows will not operate, no emergency flashers, no dash re-out, will not turn over. Happens at any time while in motion. Has placed myself, my wife & other drivers in danger numerous times.

- Houston, TX, USA

The contact owns a 2014 GMC Sierra 1500. While driving approximately 65 mph, the service stabilitrac warning indicator illuminated, the door locks activated independently, and the power steering failed. Additionally, the vehicle independently turned off and on within a few seconds. The vehicle was taken to an independent mechanic to be diagnosed, but the mechanic was unable to retrieve a fault code. The vehicle was not repaired. The dealer and manufacturer were not contacted. The approximate failure mileage was 88,124.

- Phenix City, AL, USA

I've always liked your GMC trucks but mostly been a Ford owner so this December I bought a 2014 GMC Sierra 1500 with 98,000 miles... really love the truck but then start by having problems.. first my passenger window wouldn't roll down all the way..got that fixed..then my rear drivers door lock don't work..and the big one my ac condenser has a leak ($1500 fix)which supposedly is a common problem with this vehicle..which I'm just so dissatisfied..I would really appreciated to have these problems fix for free!!! for I am regretting going GMC.

- Crookston, MN, USA

While slowing down at traffic truck felt like it was super heavy and kept going, brake pedal got hard and could not press down. Ac went out on me twice do to bad compressor and had to repair at dealer. Transmission knocks when slowing down and hard shifts like its going to break. Also visibility is poor on vehicle when driving at night as the light are very dim. Had to buy alternate lights but still dim.

- Casa Grande, AZ, USA

I purchased my vehicle brand new in order to avoid unexpected expenses that one sometimes inquire when we purchase a used vehicle. However, the truck has given me nothing but mechanical issues I've head engine power loss problems, have gone through two air conditioner major issues, radiator gone bad, transmission go out and the most recent my roof started to leak. As I did more research I came to discover that I am not the only customer in this predicament there are several others. I'm reaching out to for assistance in regards to these matters, something has to be done GMC has to take responsibility for faulty vehicles if that's is the case. They only give the go around to customers like myself that on top of having a car payment we have to somehow pay high mechanical bills for issues that should not be accruing to new vehicles.

- Concord, NC, USA

The truck dies at any moment. Stability track system warning pops up in the little screen and the steering wheel is blocked when this happen. After these to things happens the truck shut down. Sometimes, after a few minutes the truck comes back to normal. This has happened to me for like 10 times in a period of like 15 months. I have taken to the dealer like 6 times and they haven't found the problem. They have change some wires from the battery. They have reprogram the software and nothing I still have the same problem. The truck dies at any moment. All of this happen when I am driving the truck most of the times at low speed and while turning to the left or right except like two times that occurred while I was driving in the highway. The mechanics in the dealer have done all kind of diagnostic that they have but they could not duplicated the problem so the answer that I get every time is that every is fine and that they couldn't duplicated the problem.

- Austin, TX, USA

The truck will completely turn off, loss of electrical, power steering, braking - everything. First time was on highway30mph in traffic 2nd time highway going 45-50 in traffic & today in parking lot, turning in to droppoff lane an childs school. No stearing and hit the curb.

- Montgomery, TX, USA

While tapping the brakes, the vehicle's headlights will dim occasionally. 2 times now while tapping the brakes, the entire dashboard (including the touchscreen) turn off and restart. The first time was travelling on a highway and the second time was on my driveway, I applied the brakes and the entire car shut down, including the power steering, power brakes, and engine. That time I rolled out of my driveway and into the road. I was lucky no one was coming

- Mcgregor, MN, USA

Radiator coolant leaking. Either a crack in radiator or the hoses are leaking. Vehicle only has 50,000 miles

- Minot, ND, USA

While tapping the brakes, the vehicle's headlights will dim. Occasionally, while tapping the brakes, the entire dashboard (including the touchscreen) turn off and restart. On 6/18/18, while travelling on a highway at 40 miles an hour and approaching a red light, I applied the brakes and the entire car shut down, including the power steering, power brakes, and engine. I had to place the car into neutral and turn it back on in order to brake in time.

- Bonney Lake, WA, USA

On making a turn at low speed, my engine has cut out completely. I had full loss of acceleration, power steering, ac, radio. I put the truck in neutral and restart the engine to get to safety. This has occurred 3 times in the last 20 days.twice in city traffic, once on the highway, turning off for gas. The "service steering assist" light appeared. I took the truck for a full diagnostic at a local electric repair shop, for $170. The tech found nothing after hooking my truck to his computer. The day I retrieved my truck from the electrical shop, I stopped in walmart for groceries. My key fob would not lock or unlock my doors. I manually unlocked the truck to determine that the truck would not start at all. No panel/ interior lights, no response in ignition, no automatic unlocking, the truck was completely dead. Roadside service came to tow it, and the truck was jumpstarted from his battery pack. The key fob began to work, unlocking, etc. I towed the truck home. I have VIN checked my truck and there are none but I believe my vehicular failure refers to GM part 573 safety recall 17V-414 regarding the loss of eps. A secondary recall which may apply is GM# 14V26000 re steering linkages, tie rod assembly.as the "steer assist' alert was what I saw. I have the work invoice from the electrical shop, if needed.

- Horseshoe Bay, TX, USA

I temporarily had no control over the vehicle causing me to have an accident. While driving down a residential street approaching a stop sign intersection I merged into the center of St to pass a trashcan and in the process of returning to my correct position on the road I suddenly had no steering. Panicking from the loss I pressed my brakes an attempt to bring vehicle to a stop but was unsuccessful because the tires began a slide once noticing the traction loss I proceeded to release brakes and reapply in hopes of gaining traction the brief relief from brakes caused the vehicle to regain traction and while I still have no control over steering, the vehicle jerks towards the right side of the road and the brakes being reapplied the vehicle continues to slide off pavement making contact with stop sign and telephone pole.

- Moss Bluff, LA, USA