2017 GMC SIERRA 1500 Complaints

I have had ongoing issues with my 2017 GMC Sierra Denali Truck's performance since it was purchased in May of 2017 of which I have all the service records to show. In mid-June 2021, the check engine light appeared on the dashboard and I immediately contacted the service department at the GMC dealership in Fremont to schedule an appointment. On 6/18, I dropped the vehicle off for the scheduled appointment. After picking the vehicle up, I immediately noticed that it was shuddering and vibrating upon acceleration of 30-40, 40-50, 50-60 & 75-85 miles per hour. The issue persisted and I returned the vehicle to the dealership on 7/1. After several attempts during the month of July 2021 by the dealership to fix the issue and it not being resolved, I finally contacted GMC Corporate to discuss the problems and options. I was assigned a case number and to customer service assistant Farris. Unfortunately, GMC customer assistance was not very helpful with my claim and was not responsive. At one point, I asked to be referred to a supervisor but was never given that opportunity. Finally, on 8/26, I was advised that based on GMC's evaluation and review of my case, the vehicle would not be replaced or repurchased based on the history of the vehicle repairs. He did not explain to me in detail the basis of this decision. He stated that my options were to take the vehicle back to the Fremont dealership or take it to another a dealership (where I may be charged). I decided to take the vehicle to another dealership which was GMC, Modesto. The appointment was scheduled on 9/14 and the vehicle was returned to me on 9/15 after they could not diagnose or repair the vehicle. The service adviser explained that I would have to return to the dealership in Fremont. On 9/17, the vehicle was towed to that dealership. On 9/23 at 4:55 pm, service manager Dave called stating "two fuel injectors they put in previously were replaced again and wanted permission for the shop foreman to drive it home."

Within a couple of days after purchasing the vehicle new I noticed a vibration or shudder when the transmission shifted. Also, the truck would slam into gear almost like being hit in the back end, and on a few occasions while driving on the highway the truck would just downshift by itself thereby causing the engine RPM's to rev above 5,000. It has been to the dealer four times, transmission has been re-calibrated, the new and improved fluid flush and these problems still exist. The truck has just under 60K miles and has started downshifting on a regular basis causing the engine to rev. How long is that going to last before the engine blows or causes permanent damage?

GM has known issues, which I'm sure the NHTSA is aware of. This involves transmission in 2015-2019 model trucks, both GMC and Chevrolet, among other GM vehicles. In my research there have been no less than 13 TSB's issues by GM trying to rectify these issues. The latest TSB states that a new blend of transmission fluid is the fix. In my instance the transmission started shifting hard with less than 30K miles. Took to dealership and they reprogrammed the transmission control module. Fixed the issue for a while but then started back after about 10K miles. In Feb. 2020 with 60K miles a transmission temperature sensor failed on the transmission. I took it in to replace sensor and as a result they had to change the fluid at which time they told me they replaced it with the new recommended fluid. Now at 94K miles it has started producing the hard shuddering at certain speeds. This is the main problem the fluid change is supposed to fix. Well guess what. It does fix it. I'm now scheduled to take it back in on Monday 8-9-21 to have the torque converter replaced. The company I work for has about 12 of these model GMC trucks and 7 of them have had to go back in to fix this same issue. Some of them multiple times. I'm out of warranty and these repairs are not cheap. The biggest safety issue is the tranny could fail at any point going down the road and leave me with no drivetrain and potentially get hit. In my 40 years of driving and owning 20 vehicles between me, my wife and 3 kids I have never had a tranny fail. This is the first and GM has know about this issue for years. They need to be made to fix these issues and replace all transmission that are having issues and repay me the money I've already paid and the money I'll have to pay next week. This is ridiculous that NHTSA has not gotten involved enough to force GM to correct this. You need to force the hand of GM to make this right. You know of the problems, now get it fixed!!!!!!!!!!!!!!!!!!!!!!!!!

no breaks loud sound grabbing breaks growling sound very loud sweeking sound happens all time

Extreme hard shift from 1 to 2 regardless of power input. Also, sputtering after mantiaining speed (rpms jumping up and down, you can feel the power input increase or decrease). This also happens using cruise control. After researching, this is a major complaint on this vehicle.

Driving at approx 55 to 60 MPH with rear defrost on. Began to smell a burning/electrical smell, and within 90 seconds heard a loud bang. Rear window (stationary piece on drivers side) had shattered. Smell presumably coming from the rear window defrost component. No warning lights or messages on the truck. My son was sitting in the rear seat at the time so this is a huge safety risk. This has not yet been repaired. Window replacement is scheduled with Safelite on 6/8, consult with dealer on rear defrost set for 6/10. Photos are available.

The contact owns a 2017 GMC Sierra 1500. The contact stated that ‘hood open” was displayed on the instrument panel. The contact inspected the hood and confirmed that the hood was securely locked. The vehicle was not taken to be diagnosed. The manufacturer was not informed of the failure. The VIN was not available. The failure mileage was approximately 71,000.

A WARNING APPEARED ON THE DISPLAY IT SAYS SERVICE POWER STEERING DRIVE WITH CARE AND I THINK IT DOESN'T MEAN ANY GOOD THING SO PLEASE TELL ME WHAT I NEED TO DO TO DRIVE MY TRUCK SAFELY OUT OF ANY RISK. THANKS EXACTLY I DON'T KNOW WHAT HAPPENED BUT THAT WARNING APPEARS ANY TIME AFTER TURN THE TRUCK ON.

TL* THE CONTACT OWNS A 2017 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING AT VARIOUS SPEEDS, THE VEHICLE WOULD INTERMITTENTLY STALL AS THE INSTRUMENT PANEL WOULD DRAW BLANK. THE CONTACT STATED THAT THE VEHICLE WOULD RESUME TO NORMAL DRIVING WITHIN FIVE SECONDS OF THE FAILURE. THE CONTACT ALSO MENTIONED THAT HE HAD INJURED HIS LEFT WRIST WHILE TURNING THE STEERING WHEEL AS THE VEHICLE STALLED. LANDERS BUICK GMC(78 GOODMAN RD E, SOUTHAVEN, MS 38671) WAS MADE AWARE OF THE DEFECT BUT HAVE YET OFFER ANY ASSISTANCE. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE CONTACT HAD LINKED THAT FAILURE TO THE FORWARD COLLISION WARNING SYSTEM. THE FAILURE MILEAGE WAS UNKNOWN.

TL* THE CONTACT OWNS A 2017 GMC SIERRA 1500. THE CONTACT STATED WHILE DRIVING VARIOUS SPEEDS, THE VEHICLE STARTED TO SHUDDER. THE CONTACT STATED NO WARNING LIGHT WAS ILLUMINATED. THE CONTACT WAS ABLE TO DRIVE TO HIS DESTINATION. THE VEHICLE WAS TAKEN MULTIPLE TIMES TO LUTHER FAMILY BUICK GMC (3202 36TH ST S, FARGO, ND 58104, (701) 639-4547) AND 6 SOFTWARE UPDATES WERE PERFORMED ON THE TRANSMISSION. THE CONTACT STATED THAT THE FAILURE PERSISTED. THE MANUFACTURER WAS INFORMED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 23,000.