2018 GMC Sierra 1500 Transmission Problems
From NHTSA owner complaints and recalls. Updated Oct 17, 2026.
How common are transmission problems on the 2018 GMC Sierra 1500?
131 owners have reported transmission problems on the 2018 GMC Sierra 1500, 43% of all complaints for this year and the most reported problem area. Most reported problems happened at about 11,000–66,000 miles. No recall covers this problem.
131 complaints 43% of all 2018 complaints 30,000 miles typical
Which parts fail
The specific part named in each complaint.
Mileage when it failed
Each dot is a complaint that gave a mileage (57 of 131). The amber line is the middle value.
When problems were reported
Transmission complaints by the year the problem happened.
Transmission complaints by Sierra 1500 year
Related recalls
No recall covers transmission problems on the 2018 GMC Sierra 1500. See all 7 recalls for this year.
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We check NHTSA every month. If a new recall or safety investigation covers the 2018 GMC Sierra 1500, you'll hear about it the same week.
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Common questions
What are common 2018 GMC Sierra 1500 transmission problems?
Complaints most often name the torque converter.
At what mileage do 2018 GMC Sierra 1500 transmission problems happen?
Most complaints that gave a mileage fell between about 11,000–66,000 miles. The middle value is about 30,000 miles.
Is there a recall for 2018 GMC Sierra 1500 transmission problems?
NHTSA lists no recall for this problem on the 2018 GMC Sierra 1500. If you have the problem, file a complaint at nhtsa.gov so it is counted.
Which Sierra 1500 year has the most transmission complaints?
The 2021 Sierra 1500, with 142 complaints.
Source: NHTSA complaints and recalls databases. Complaints are unverified owner reports.