2018 GMC Canyon Power Train

This is a known problem with GMC and Chevy trucks, known as the Rumble. At approximately 45mph and up, the truck feels like it’s going over rumble strip and the back end is slipping. This causes the steering wheel and truck to shake. It could result in the loss of control if it gets too bad. I took it in for diagnostic testing, which confirmed that it was the transmission. They recommended a triple flush and replacement of the transmission fluid, as well as a computer upgrade. I had them complete the recommended service. As of right now it seems to have helped. But if it returns the next steps is to replace the torque converter. There were no warning lights, nor messages indicating an issue.

The contact owns a 2018 GMC Canyon. The contact stated that while driving in the snow, the 4WD function became inoperable, and the vehicle lost traction and started skidding. The "Service 4WD" message was displayed. The vehicle was taken to a dealer where it was determined that a chip inside of the casing of the 4WD feature was inoperable. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 40,000.

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.

The transmission is sluggish and jerky resulting in unpredictable and inconsistent speed control. The vehicle is available for inspection, if requested. The inconsistent speed control is a potential hazard during acceleration and deceleration. The issue is known to the manufacturer. No warning lamps or messages have been observed. The symptoms began to appear soon after the vehicle was purchased on 12/28/2024.

Vehicle switched out of four wheel drive while travelling up hill in snow. Resulted in a loss of traction and sliding downhill until it collided with a tree, resulting in$9,000 worth of damage. I have heard of the AWD/4WD actuator failing in other GMC trucks. The vehicle is currently in for repairs.

Transmission developed shutter/shimmy when shifting gears especially at lower speeds. Took truck to dealer and they diagnosed that the torque converter had failed. There are numerous reports and complaints online regarding this issue with GMC Canyons.

The contact owns a 2018 GMC Canyon. The contact stated that on various occasions while driving approximately 70 MPH, the vehicle was shaking. There was no warning light illuminated. The vehicle was taken to several independent mechanics; however, the mechanics were unable to duplicate the failure. The tires were and balanced. The contact stated that the failure was reoccurred. The contact stated that after taking the vehicle back to another independent mechanic, it was determined that the transmission and torque converter needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was unknown.

The transmission has a rough shift from 1st to 2nd, whether it is upshifting or downshifting, and isn't always predictable. This rough shift often feels like a lurching forwards when it shifts from 1st to 2nd and from 2nd to 1st it feels like something hits me in the back and shoves me forward. The 1st to 2nd often makes me feel out of control of the vehicle and while it hasn't endangered anyone as of yet, I am concerned that it will push my into the car in front of me one day. The 2nd to 1st shift also causes me concern for how it may cause me a neck injury if I'm not always focused when I'm close to that shift point. The problem has not be reproduced by a dealer or independent service center, though I do plan to take it when I have the time in the near future. The problem has not been inspected by anyone. There are no warning lights, messages, or other symptom to indicate the problem will occur.

When coming to a stop the truck lunges forward like you have been bumped from behind and you can hear and feel it! When going forward the truck shift fine.

When cold the transmission slips badly causing a loss of power that has caused me to narrowly avoid being struck from behind by another vehicle. The slippage can be severe. The transmission appears starved for fluid. After completely warmed up the problem goes away. It is clearly a factory defect that GM is aware of and refuses to fix.

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.

FOR SEVERAL MONTHS, WE ARE NOW CONTINUOUSLY EXPERIENCING A SHAKING AND SHUDDERING OF THE CANYON EVERY TIME THE TRUCK SHIFTS FROM 1ST TO 2ND GEAR. IT IS VERY DISTURBING DRIVING DOWN THE STREET AND THE CANYON BEGINS TO SHAKE SO HARD THAT EVERYONE IS JARRED IN THEIR SEATS EVEN WITH SEAT BELTS ON. IT IS ALMOST AS IF THE CANYON IS BEING REAR ENDED BY ANOTHER VEHICLE AS WE'RE DRIVING DOWN THE STREET. OUR BIGGEST CONCERN IS THAT IT HAPPENS ON MAJOR ROADS WHENEVER WE ACCELERATE AFTER A TRAFFIC LIGHT TRANSITIONS FROM RED TO GREEN. AS WE CLEAR THE INTERSECTION, THE SHAKING OCCURS AND AS THE CANYON REDUCES SPEED MOMENTARILY, WE HAVE ALMOST BEEN REAR ENDED. OUR CANYON IS STILL UNDER WARRANTY AS WE HAVE THE EXTENDED POWERTRAIN WARRANTY. FURTHERMORE, WE JUST LEARNED OF A GM SERVICE BULLETIN, 18-NA-355 DATED AUGUST, 2019, THAT HAS BEEN CIRCULATING. WE FOUND A COPY OF THE TORQUE CONVERTER CLUTCH SB AND IT APPLIES TO ALL GMC CANYONS FROM 2017-2019. NEEDLESS TO SAY, GM (CORPORATE AND DEALERSHIP) WANT US TO PAY OUT OF POCKET FOR A VERY EXPENSIVE DIAGNOSTICS TEST (E.G., HUNDREDS OF DOLLARS) TO CONFIRM THERE IS A PROBLEM AND THEN DETERMINE IF WARRANTY WILL COVER THE REPAIR(S). THIS IS A VERY SERIOUS VEHICLE SAFETY ISSUE THAT CAN CAUSE ACCIDENTS IF THE DRIVER IS NOT ACCUSTOMED TO BEING TOSSED ABOUT IN THEIR SEAT WHILE DRIVING THE CANYON. GM NEEDS TO DO A RECALL TO FIX THIS PROBLEM FOR ALL AFFECTED VEHICLES AS PEOPLE, ESPECIALLY THOSE THAT ARE ON FIXED INCOMES, ARE NOT ABLE TO PAY OUT OF POCKET FOR A TEST JUST TO VALIDATE THE TOQUE CONVERTER CLUTCH SHUDDER DOES EXIST.

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.

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.

MY 2018 GMC CANYON SLT SHUDDERS ALOT. IT IS NOT CONSTANT BUT IT IS OFTEN. IT SORT OF FEELS LIKE YOU'RE DRIVING OVER RUMBLE STRIPS. I DO NOT FEEL IT AT HIGHWAY SPEEDS, JUST DRIVING AROUND TOWN. IT'S ESPECIALLY PREVALENT WHEN GOING UP HILLS. TO ME, IT FEELS LIKE A TRANSMISSION ISSUE. WHEN I DID A GOOGLE SEARCH, I FOUND OUT IT'S A KNOWN PROBLEM. I CONTACTED MY DEALER AND THEY WERE FAMILIAR WITH IT ASKING IF I HAD A TRANSMISSION FLUID CHANGE YET. I TOLD THEM I HAD NOT AND THEY SCHEDULING ME FOR THAT SERVICE IN A COUPLE WEEKS. I AM NOT HAPPY THAT MY 2 YEAR OLD $40K PLUS TRUCK HAS A TRANSMISSION PROBLEM AT 25K MILES.

I JUST PURCHASED A 2018 GMC CANYON USED WITH 8,000 MILES ON IT. DROVE IT 500 MILES AND NOW I HAVE A 8 SPEED TRANSMISSION AND NOW IT SHUDDERS. NOW I'M READING ALOT OF PEOPLE ARE HAVING ISSUES WITH IT. AM I IN THE LAWSUIT WITH GM IN THERE DEFECTIVE TRANSMISSIONS? IT SHUDDERS AT 55-60 MPH DROVE ME NUTS ON THE HIGHWAY.

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 FEEL AS DANGEROUS TO DRIVE. MY VEHICLE HAS 27,000 MILES ON IT AND HAS BEEN IN THE SHOP COUNTLESS TIMES SINCE I PURCHASED IT IN 2018. I DON'T EVEN LIKE DRIVING IT BECAUSE I FEEL THAT IT IS A SAFETY CONCERN AND IS ENDANGERING MYSELF AND OTHERS.

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.

TRANSMISSION JERKS FROM 4TH TO 5TH. SOMETIMES FEELS LIKE SOMEONE HIT YOU IN THE REAR ENDED.

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.