2020 GMC Terrain electrical system problems
The 2020 GMC Terrain has 29 electrical system complaints filed with NHTSA — 10% of the year's total, and down from the prior model year.
29
Electrical System complaints
10%
Share of year
0
Crash-involved
0
Related recalls
Electrical System complaints by year
What owners report
“On fairly level ground, reduce speed hill descent control msg has activated (12 mile and maxwell area 2x, Rochester Hills Kohls parking lot exit) and once entering river bend dr. vehicle has also has had activated brakes on oak hill street in rochester. the vehicle has less than 4100 miles. very…”
Common questions
How many electrical system complaints does the 2020 GMC Terrain have?
NHTSA has 29 complaints about the 2020 GMC Terrain electrical system — 10% 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.