2021 GMC Yukon Transmission & Power Train Problems
NHTSA component category: POWER TRAIN · data through 07/14/2026
Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
How power train ranks on this vehicle
Share of the 293 complaints citing each category; one complaint can cite several. Full breakdown on the 2021 GMC Yukon overview page.
What owners report
“Rear end locking up still after 3 attempts at repair. Concerned about an accident when the vehicle stops moving in traffic.”NHTSA complaint 11637876 — filed 01/23/2025
“Upon cold start vehicle rattles when idling down and growling noise when accelerating upon left or right turns. Also, has constant vibrations with sound of…”NHTSA complaint 11637446 — filed 01/21/2025
“The contact owns a 2021 GMC Yukon. The contact stated while driving 60 MPH, the message "Reduced Acceleration" was displayed, and the check engine warning…”NHTSA complaint 11626922 — filed 11/22/2024
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Power Train complaints by year filed
Frequently asked questions
Does the 2021 GMC Yukon have transmission & power train problems?
Power Train is the #2 most-reported problem area on the 2021 GMC Yukon: 47 of 293 complaints on file (16%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 2021 GMC Yukon have in total?
293 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 9 involved a crash, 0 involved a fire, 9 reported injuries, and none reported deaths.
What does NHTSA's power train category include?
NHTSA groups complaints about the transmission (automatic or manual), driveline, axles, transfer case and related parts under a single component category called POWER TRAIN. This page reports that category as NHTSA defines it.
