This preliminary informational (PI) bulletin provides information to dealership personnel that may be helpful when addressing underbody component corrosion with customers.
full bulletin at NHTSA ↗2020 GMC Canyon powertrain problems
moderate Owners of the 2020 GMC Canyon have filed 5 NHTSA complaints about the powertrain at roughly $2,500 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See powertrain across all vehicles →
Complaints
5
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2016 Canyon | 34 |
| 2017 Canyon | 16 |
| 2018 Canyon | 24 |
| 2019 Canyon | 6 |
| 2020 Canyon (this page) | 5 |
| 2022 Canyon | 4 |
| 2023 Canyon | 3 |
When does it fail?
Of the 5 powertrain complaints filed for the 2020 GMC Canyon, here's the actual mileage breakdown — failures cluster heaviest at 0-25,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering powertrain on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This Preliminary information communicates Diagnostic aids for a no start or DTC'S following a transmission replacement
full bulletin at NHTSA ↗This Preliminary information communicates Diagnostic aids for a no start or DTC'S following a transmission replacement
full bulletin at NHTSA ↗This service bulletin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flares.
full bulletin at NHTSA ↗This Preliminary Information communication provides information to the technician about vehicles that may have a delayed engagement into drive, shudder at a launch, or the transmission is slipping when shifting into 1st, 2nd, 3rd or 4th gears. This may be due to loose stator support to pump cover bolts causing a leak at the stator support to pump cover gasket. Technician will check for the bolts to be loose. If any of the bolts are loose or the gasket is misaligned or leaking, the transmission pump cover must be replaced and the 1234 clutch plates should be inspected for being distressed and repaired as needed.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 5 most recent
The wiring in most vehicles 2020 and newer are soy/ nut based product… which squirrels, rodents and other animals can’t resist and the wiring throughout the vehicle is being chewed this all makes all models all manufacturers… there is also problems with the 8 speed transmission that shutters and hard gear changing and the quick fix is to flush out and refill it with transmission fluid
I'm the owner of a newly bought (6/5/2020 purchased date) 2020 GMC canyon. I took my truck into the dealership and complained that I have experienced transmission issues when downshifting or accelerating. My most common issue is 'shuddering' when the truck accelerates and sudden 'jerking' when downshifting gears when driving up an incline or even coming to a complete stop. The dealership said…
The main issue is the transmission... It shudders. Now I have to change the oil every 10K miles on it, or it will start shuddering again. It first started when the truck had 50K or a little more miles in it. The issue was resolved, I thought... Then it did it again at 69K (Just out of the warranty). I called the dealership and they stated I had to pay if I wanted an oil change, and they could…
I am the owner of a 2020 canyon sle that was purchased in june of 2020. The vehicle has about 20,000 mile on it currently. I have been experiencing a "lag" on acceleration after coming to a stop. This feels like the transmission isn't down shifting all the way. At time when accelerating from a stop the truck will act as it is in a high gear then suddenly slam into a first gear. I have take…
When rolling to stop signs or red lights, the vehicle occasionally fails to downshift properly and will attempt to continue pushing the vehicle when trying to stop. On multiple occasions, the vehicle acts as if it cannot be stopped due to the transmission failing to downshift. One must aggressively apply the brakes to get the vehicle to come to a stop. Unable to have the vehicle checked out at a…
Had powertrain trouble with your 2020 GMC Canyon?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the powertrain problem on the 2020 GMC Canyon?
It's a documented issue but not catastrophic. 5 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Based on the 5 complaints filed, powertrain issues most often appear around 13,500 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2020/GMC/Canyon.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.