2018 GMC Canyon owner complaints

Rumbling of transmission. Clucky start. Gm dealer acknowledges the problem and has tried to repair vehicle. Gm says at this time the truck 8 speed transmissions are not fixable.

The contact owns a 2018 GMC Canyon. The contact stated that while driving at an undisclosed speed, there was an abnormal knocking sound coming from the engine compartment. No warning lights were illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the transmission. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 34,929.

When moving on the highway the vehicles' transmission starts to shudder. This usually happens when I am going up a slight incline and my engine is around 1400 rpms. I have taken the truck to the dealership multiple times over this issue. They have replaced the transmission fluid twice and the next appointment is next week on october 31st. The dealership told me that more than likely they will have to flush the transmission fluid again because gm is not letting them do much more with this issue. The truck also has a hard time shifting when it is first started until it gets warmed up. Also there are times I feel like I have been rear ended when I am slowing down and it is down shifting. I have noticed that if I keep the truck at a fairly higher RPM that it does not shudder as bad and doesn't

With 69025 miles transmission momentarily slips into free wheel then re- engages causing a surge. Transmission specialist states computer analysis shows internal issue requiring replacement of transmission. Shutter found after 3rd year.

i purchased this truck used about 5000 miles ago and it now has 26,800 miles and when you put it in park the key will not come out.you have to keep starting and shutting off and eventually it will come out.i have read alot of complaints about this and nothing is being done at gm.they should be ashamed of themselves for a substantial issue and they want to charge the customer for there issue.

My GMC canyon has only 35,000 miles. It started shaking, shuddering frequently, and having hard shift when changing gears, specially when speeding down. It feels similar to drive over the street lines with a similar sound. There is a strong sound coming from the transmission when fast shifting happened from high to low or when stop at the stop light. It is like the engine wants to leave from the body of the truck. This vibration is also felt when driving at low speed or low gear and the truck is demanding more power, but the transmission does not control that demand. It is like not communication between the transmission and the engine.

The automatic transmission shifts aggressively the first gears from a cold started engine after engaging from park to drive. Sluggish shifting and acceleration.

Transmission clunks feels like your hit in the rear end. I thought I was rear ended 3 times so far. My transmission surges forward from 4th to 5th gear. Very dangerous to wear I don't want to drive the truck.

I have been receiving the “Service Trailer Brake System” error intermittently. The only information I have been have to find around this is a defective wiring harnesses between two modules. This defect is not due to wear/tear and has been reported as a defective part on multiple GMC models. When this service error pops up it is distracting and very unsafe for driving as well as dangerous when towing as the driver has no idea of the trailer brake system is functioning properly..

The contact owns a 2018 GMC Canyon. The contact stated while parking the vehicle, the ignition key was difficult to remove from the ignition cylinder. The contact stated that the failure was constant and was unable to remove the key from the ignition cylinder, causing the 12-Volt battery to be drained. The contact had taken the vehicle to a local dealer, where it was diagnosed and determined that the contact needed to jiggle the key until being able to remove the key from the ignition cylinder. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 38,000.

Key sticks in ignition on accessory and cannot be removed. Service Bulletin generated by GMC. Available for inspection. Safety: with key stuck in accessory position battery goes dead in 4-6 hours, potentially stranding occupants and depending on location possibly creating a traffic hazard. Three attempts by GMC Fremont CA to repair so far. They have confirmed the problem. No warning or message.

When placing the vehicle in reverse, the infotainment screen goes to full brightness on the reverse camera, making it difficult to see at night by lighting up the cabin causing interior reflections when trying to see out the windows at mirrors or behind the vehicle. There is no way to adjust the brightness setting. This is a pointless feature as the camera becomes the required visual point and is sometimes obscured by dirt or water so the driver is forced to fight the bright useless screen to see out the windows.

The contact owns a 2018 GMC Canyon. The contact stated while the vehicle was parked, the contact attempted to remove the key fob from the ignition, and the key fob was stuck. There was no warning light illuminated. The contact stated that the gear shifter was in park(P) but the contact was unable to remove the key fob. The contact restarted the vehicle and shifted into other gears several times to remove the key fob. The vehicle was taken to the dealer where it was diagnosed that the gear shifter assembly had failed and needed to be replaced. The vehicle was repaired; however, the failure recurred. The vehicle was taken back to the dealer where it was not diagnosed or repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 32,500.

Vehicle has less than 25,000 miles. Over the last 3 days, after vehicle is put in park and turned off, the key will not always rotate back to the 'off' position, and can not be removed from the ignition. This has happened at least 6 times over the last 3 days. Managed to remove key by turning vehicle back on and driving back and forth a few inches, then trying again. Took multiple tries on some occasions. With less than 25,000 miles, nothing should be worn out... Safety concerns:The possibility that the key will completely fail to be removable, meaning that if the vehicle must be left unattended, it must be left unlocked and in a condition that it could be started and stolen or driven by a curious child. The possibility that see-sawing back and forth in a parking spot could lead to

I was traveling on a two lane highway, a semi in front of me and a truck behind me. A warning message popped up on my dash “Service Emissions System- 65 mi before 65mph max speed”. And within 5 seconds of that message popping up, the engine detuned itself. I pulled over as quick as I could, but I only made it partially out of the road before the engine shut down completely. I couldn’t start the vehicle again to get it the rest of the way out of the road. I was 40 miles from the nearest town on a Sunday. I had to turn on my flashers and sit outside the vehicle for 4 hours until a tow truck was able to come get me. Thankfully at the time of incident I was on a rural highway and I wasn’t hurt, but I could have been seriously injured haha this happened on the freeway or a road in the city. It

My 2018 GMC Canyon just underwent repairs due to a crack in the head gasket. A serious issue which resulted in having to take said GMC Canyon to a mechanic before further damage to the engine could be suffered. My truck only had a measly 76,000 miles. Definitely, something GMC should take a look into. I however was fortunate enough to notice abnormal loss in the coolant reservoir before suffering excessive overheating or potentially an engine fire. At such a low mileage as well as the nature this issue GMC should take pride in ensuring reliability and care for the customers that experienced this manufacturing defect.

At age 4 years and mileage 40,000 the engine oil coolant lines failed, causing a loss of oil. Because of the location of these lines in front of and above the front axle, the potential for oil contamination of the tire running surfaces and the brake rotor existed. Fortunately, we did not drive it any distance and were extremely cautious. In looking at the parts, which we have replaced, they show much more corrosive damage than I would have expected for the trucks age. A cursory search online revealed that this is not an uncommon problem for the gm Canyon/Colorado lines.

Backup lights are not working; bulbs are good. No apparent chafing/wear on wiring harness. Removed ground strap, cleaned and reattached. Still not working. 48,000 miles on 2018 GMC Canyon SLT, diesel engine.

At night, the back-up camera display on the dash is so bright, it lights up the whole cab and this causes the driver not to be able to see anything outside the cab or around the vehicle when reversing. I almost backed over my wife because I could not see her because of the brightness. There is no way to adjust the brightness when it is in reverse and in the dark you can not see much in the screen because of the brightness. I took it to the dealer and he said they have seen this problem on the full sized trucks but not the mid-sized and he said it was in working condition. I feel this is very dangerous if you can't see when you are reversing.

Tl* the contact owns a 2018 GMC canyon. The contact stated that the steering knuckle was cracked where it connected to the ball joint. The dealer (darling's auto mall, 16 kingsland crossing, ellsworth, me 04605, 1-(877) 548-1819) indicated that they ordered the part for the steering knuckle replacement, but they did not specify when it would arrive. The manufacturer was notified of the failure. The VIN was not available. The approximate failure mileage was 3,000.