2011 GMC Sierra Denali Transmission and drivetrain Problems
- Complaints
- 2about this part
- Share
- 7%of 28 total for the year
- Median mileage
- 51,875miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the transmission and drivetrain of the 2011 GMC Sierra Denali, 7% of the 28 complaints for this model year. Where a mileage was given, the median is 51,875 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“In 2017 before my vehicle completing two years from the date of purchase at (70,000 km) the vehicle start shuddering when accelerating at low speed, when the service was due I took the vehicle to dealer for service & complained about the shuddering issue, after diagnosing the vehicle they said that they have to replace the torque converter, so they did replace the torque converter under warranty after fixing the torque converter issue I found trace of oil in front driver side & again when the service was due I complained about the leak, after diagnosing the found that the shock absorber is…”
NHTSA complaint #11337567, filed 2020-07, 43,750 miles“On july 29, 2015, while driving at approximately 45 MPH, the vehicle suddenly downshifted itself into first gear causing the vehicle to slow down suddenly with no notice. I was able to get the vehicle off the road and into a gas station. After the fact the check engine light was illuminated. The vehicle was towed to the dealership. I was told the TCM (transmission control module) needed replacing and that there is a known issue with this year truck. This is a very dangerous situation to have your vehicle suddenly slow down while driving at speed. …”
NHTSA complaint #10746325, filed 2015-08, 60,000 milesRelated service bulletins
- 11011205Oct 28, 2024This informational bulletin explains Unscheduled Supplemental Services and the importance of GM Simplified Maintenance Schedules.
- 11009756Sep 17, 2024This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and…
- 11009088Sep 16, 2024This service bulletin provides information on some vehicles that may rock or move slightly forward or rearward while in Park at start up after cold soak. This condition may be…
- 11006421Jul 24, 2024GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or…
- 11005311Jul 9, 2024This service bulletin provides information on Driveline Clunk Noise and what is acceptable and what is considered normal operation.
- 11001321May 16, 2024This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.
- 11000119Apr 26, 2024This service bulletin provides technicians with information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
- 10250347Feb 2, 2024This Warranty Admin service bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and…
- 10249579Jan 12, 2024This PI bulletin advises the technician on the proper way to install the pistons in an engine.
- 10248721Dec 18, 2023This bulletin advises the technician that the 6L50 (MYB), 6L80 (MYC) and 6L90 (MYD) Transmission Oil Filter and Seal Kit part number 24236933 is currently transitioning from a…
Transmission and drivetrain: other model years
Other parts of the 2011 GMC Sierra Denali
17 complaintsAir bags
10 complaintsBody and structure
9 complaintsSuspension
1 complaintsWheels
1 complaints
← All problems reported for the 2011 GMC Sierra Denali
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology