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 Yukon powertrain problems
moderate Owners of the 2020 GMC Yukon have filed 14 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
14
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2016 Yukon | 33 |
| 2017 Yukon | 44 |
| 2018 Yukon | 16 |
| 2019 Yukon | 11 |
| 2020 Yukon (this page) | 14 |
| 2021 Yukon | 42 |
| 2022 Yukon | 26 |
| 2023 Yukon | 34 |
| 2024 Yukon | 21 |
When does it fail?
Of the 14 powertrain complaints filed for the 2020 GMC Yukon, here's the actual mileage breakdown — failures cluster heaviest at 100,000-125,000 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 service bulletin helps diagnose/reduce possible CCND issues on Transfer Cases - Service 4WD on DIC, Intermittent Failures, Noise Concerns, Driveline/Steering Vibration/Shudder, Intermittent DTCs/MIL Illuminated, Engagement/Disengagement/Ratcheting Concerns.
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 Preliminary information communicates Diagnostic aids for a no start or DTC'S following a transmission replacement
full bulletin at NHTSA ↗This bulletin helps aid the tech in possible noise that may be normal or abnormal depending on the concern noted.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners of 2020 Yukon models describe critical powertrain failures centered on the transmission and torque converter. The most common complaint is sudden, catastrophic gear engagement failure—the vehicle loses the ability to shift or maintain a gear, sometimes requiring multiple engine restarts just to move a few miles. One owner reported 15 separate stalling events in a 10-mile drive.
Several owners specifically cite torque converter failure as the root cause, noting this is described as a "known problem" that occurs regardless of maintenance. Failures cluster around 100,000 to 119,000 miles, often shortly after factory warranty expiration. In one case, transmission fluid inspection revealed burnt discoloration with visible metallic particles, indicating severe internal damage.
Another failure mode involves transmission overheating warnings coupled with loss of motive power, with the vehicle continuing to roll forward even in Park or Neutral—a safety hazard.
Notably, most failures produce no check engine light or diagnostic code until the transmission is already destroyed. One dealership's attempt to reset transmission computer settings actually worsened the problem. Repair costs cited range from $5,000 to $7,200 for complete transmission replacement. Owners express frustration that despite describing this as a widespread, known defect, no recall has been issued.
Same GMC Yukon powertrain reports on nearby years: 2017 · 2018 · 2021 · 2022 · 2023
Failure modes owners describe
Torque converter failure and transmission damage
Torque converter fails without warning, often shortly after warranty expiration, leading to transmission failure requiring complete transmission replacement. Owners report the failure occurs as a known defect unrelated to maintenance or abuse.
When: Under 107,000 miles; one reported at 100,000 miles, one at 107,267 miles
Symptoms owners cite: Vehicle will not change gears while driving; Sudden loss of power and motive force; Transmission slipping in and out of gear; No warning lights prior to failure; Vehicle jerks when attempting to move from a stop; Engine revs but vehicle hesitates to respond
Repairs/costs cited: Torque converter replacement and complete transmission replacement; costs cited at $5,000 to $7,200
Recalls/TSBs owners mention: One owner reported manufacturer was notified and case opened via NHTSA; owners indicate this is a known problem with no recall issued
Transmission slipping and gear engagement failure
Transmission repeatedly fails to engage gears, requiring repeated engine restarts to regain power. Fluid inspection reveals burnt fluid with metallic particles, indicating internal transmission damage.
When: One complaint at approximately 100,000 miles
Symptoms owners cite: Serious loss of speed and deceleration; Downshift without re-engagement in lower gear; Vehicle becomes stranded and unresponsive; Transmission fluid burnt in color with visible particles; Multiple restarts required per short drive to restore engagement
Repairs/costs cited: New transmission required, cost $7,200; technician reset transmission computer settings prior to failure, which worsened the issue
Transmission overheating with loss of motive power
Vehicle loses motive power while driving and continues to roll forward even when shifted into Park, Neutral, or Reverse. Transmission overheating warning illuminates.
When: At 119,000 miles
Symptoms owners cite: Sudden loss of motive power while driving; Vehicle continues to move forward in Park, Neutral, or Reverse; Transmission overheating warning message illuminated
Recalls/TSBs owners mention: Manufacturer notified, case opened, contact referred to NHTSA
Transmission shuddering and complete failure
Transmission begins shuddering and slipping, loses power, and fails completely within a short timeframe. One instance reports failure while driving with shaking and check engine light.
When: One reported as occurring within one hour of initial symptoms
Symptoms owners cite: Transmission slipping; Shuddering or shaking; Loss of power; Check engine light illumination; Complete transmission failure
Synthesized from 14 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 9 most recent
2020 GMC Yukon transmission failed at 103.000 miles
The transmission is out. Prior to it going out, I experienced loss of power, gear slipping, shuttering and not being able to go among other things. This is very dangerous and can cause serious accidents to occur. This should not be happening on such an expensive and newer vehicle.
The contact owns a 2020 GMC Yukon. The contact stated that while driving at various speeds, the vehicle jerked and the transmission malfunctioned, causing the wheels to lock up and the check engine warning light to illuminate. The vehicle was driven to a local dealer who diagnosed that the transmission clutch and pressure control solenoid had failed. The contact was advised that the transmission…
Transmission slipping and damage
Complete transmission failure at 82,000 miles. Well maintained vehicle, not used for towing or heavy hauling. Required complete replacement. Traveling at highway speeds and-according to repair facility- valve failure caused transmission to overheat a stripped gears, causing complete failure. Vehicle was unable to shift into any gears and was left inoperable. Required towing assistance and…
The contact owns a 2020 GMC Yukon. The contact stated that while depressing the accelerator pedal, there was an abnormal popping sound coming from the engine compartment, and the vehicle hesitated while accelerating. The cause of the failure was not yet determined. The manufacturer was notified of the failure, but no assistance was provided. The local dealer had not yet contacted. The failure…
The contact owns a 2020 GMC Yukon. The contact stated that while driving at an undisclosed speed, the vehicle inadvertently lost motive power, prompting the contact to pull over to the shoulder of the roadway. The contact became aware that the vehicle continued to move forward while shifted into Park, Neutral, or Reverse. The contact stated that the message "Transmission Overheating" was then…
Shortly after the warranty expired my torque converter went out and damaged the transmission. After speaking with several transmission shops this is a known problem with this vehicle! The torque converter and transmission are poorly made, and no matter if you get all of your services this will still happen to you! This should be a recall on this vehicle. Less than 4 years old and I am having…
Severe transmission shuttering destroyed my transmission and I need a new one according to a local body shop and a GMC service center. This is a KNOWN issue with these 10 speed transmissions, but they will not recall the ones from this year, they only recalled newer models. Car has been inspected by a local autobody shop, a 3rd party warranty company, and a GMC dealership service center.…
Had powertrain trouble with your 2020 GMC Yukon?
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 Yukon?
It's a documented issue but not catastrophic. 14 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 14 complaints filed, powertrain issues most often appear around 97,067 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/Yukon.
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.