2018 GMC Sierra 1500 transmission problems
The 2018 GMC Sierra 1500 has 126 transmission complaints filed with NHTSA — 30% of the year's total, and roughly flat versus the prior model year.
126
Transmission complaints
30%
Share of year
4
Crash-involved
0
Related recalls
Transmission complaints by year
What owners report
“Hard changes with transmission like a car has hit you from behind. It has had a hit in the transmission changing gears since 15,000 miles but it has progressively gotten worse and at 67k itâs enough to knock you to change steering direction. ”
Common questions
How many transmission complaints does the 2018 GMC Sierra 1500 have?
NHTSA has 126 complaints about the 2018 GMC Sierra 1500 transmission — 30% of all complaints filed for that model year.
Related
Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.
Compiled by Sharon Ben-Moshe, Founder.