Showing the 2021 XT6 Platinum Sport. We haven't verified this trim's engine; the numbers below cover every version of this model year. Every version
Owner complaints, recalls, fuel economy and safety ratings from public NHTSA and EPA data, updated Oct 18, 2026.
Fuel economy
21–23 mpgcombined; city 18–21, highway 25–27; every version of this model year
Five years of fuel
$15,470–$17,500U.S. average; Ohio $13,820–$16,490 at local prices; every version of this model year; fuel only, not other costs of owning it; 15,000 miles a year, at EIA fuel prices for the week of Oct 12, 2026
NHTSA's VIN data lists these trims for the 2021 XT6. A trim's engine and numbers are shown as its own only where EPA names versions after the trim and no other version could be it; "seen with" means a source shows that engine on the trim, not that it was the only one. Recalls and complaints cover the whole model year: whether a recall applies to a car depends on its VIN, on NHTSA's recall lookup.
Owners have filed 20 complaints with NHTSA about the 2021 XT6. These are unverified owner reports, counted by the part of the car they name; one complaint can name several parts. Counts aren't adjusted for how many were sold, so they don't show how reliable a car is.
Complaints by part of the car
Part
Complaints
Crashes
Fires
Injuries
Electrical system
5
0
0
0
Back over prevention
4
0
0
0
Engine
4
0
0
0
Fuel/propulsion system
4
0
0
0
Steering
3
0
0
0
Unknown or other
3
0
0
0
Forward collision avoidance
2
0
0
0
Engine and engine cooling
1
0
0
0
Power train
1
0
0
0
Service brakes
1
0
0
0
What the columns count
Complaints: complaints that name that part. One complaint can name several parts, so the rows overlap and don't add up to the total.
Crashes and Fires: complaints that report one. Two owners can file about the same event, and NHTSA doesn't link them, so these count reports, not events.
Injuries: the number of people the complaints say were injured.
None of these columns shows that a part caused a crash, fire or injury: they're what owners reported, unverified.
Complaints by model year
Newer years have had less time to collect complaints, and counts aren't adjusted for sales, so a shorter bar doesn't mean a more reliable year.
NHTSA lists 2 recall campaigns for the 2021 XT6 over its history. Campaigns are matched by model and year, so each one may apply to a given car, and its repair may already be done: check a VIN on NHTSA's recall lookup for the open recalls on that exact car.
Back over prevention: sensing system
NHTSA campaign 22V709000 · reported Sep 22, 2022 · 95,231 vehicles potentially affected across the whole campaign
Remedy: Dealers will replace the coaxial cables, free of charge. Owner notification letters were mailed January 18, 2023. Owners may contact Cadillac customer service at 1-800-458-8006 or GMC customer service at 1-800-462-8782. GM's number for this recall is N222378380.
General Motors, LLC (GM) is recalling certain 2020-2021 Cadillac XT5, XT6, and GMC Acadia vehicles equipped with the optional Surround Vision feature. The rearview camera coaxial cable connectors may have been crimped improperly, causing the rearview camera to fail or function intermittently.
Risk: An inoperative rearview camera can reduce the driver's rear visibility, increasing the risk of a crash.
NHTSA campaign 21V422000 · reported Jun 3, 2021 · 572 vehicles potentially affected across the whole campaign
Remedy: Dealers will inspect and replace fuel supply lines as necessary, free of charge. Owner notification letters were mailed on July 1, 2021. Owners may contact Cadillac customer service at 1-800-458-8006 and GMC customer service at 1-800-462-8782. GM's number for this recall is N212335590.
General Motors, LLC. (GM) is recalling certain 2021 Cadillac XT5, XT6, and GMC Acadia vehicles. The fuel supply lines may be improperly attached and seated.
Risk: Improperly attached and seated fuel supply lines may loosen or separate, causing a fuel leak and increasing the risk of a fire.
Carmakers sent NHTSA 815 service bulletins and notices that cover the 2021 XT6, the latest on Sep 26, 2026. They tell dealers how to fix known issues.
The parts they mention most: equipment (213), electrical system (197), engine and engine cooling (130), unknown or other (117), power train (97).
NHTSA defect investigations
Opening an investigation isn't a finding of a defect. Outcomes are as NHTSA's summary states them. A recall is shown as an investigation's outcome only where NHTSA's summary names it; other recalls NHTSA's file lists with it are marked as listed, not caused.
Investigation
Part
Opened
Status
Preliminary evaluation PE22006 Rear-View Camera Failure · covers 2 makes
The owner's manual gives the oil and how often to change it. We show oil facts only once we've checked them against the manual, and we haven't yet for the 2021 XT6.
EPA class: small sport utility vehicle. EPA greenhouse gas score: 4–5 out of 10. Each version EPA tested:
Swipe the table sideways for more columns.
Version
Engine
Transmission
Fuel
City / hwy / comb
XT6 Front-Wheel Drive
2.0 L, 4 cyl, turbo
Automatic (S9)
Premium Gasoline
21 / 27 / 23
XT6 All-Wheel Drive
2.0 L, 4 cyl, turbo
Automatic (S9)
Premium Gasoline
21 / 26 / 23
XT6 Front-Wheel Drive
3.6 L, 6 cyl
Automatic (S9)
Regular Gasoline
19 / 26 / 21
XT6 All-Wheel Drive
3.6 L, 6 cyl
Automatic (S9)
Regular Gasoline
18 / 25 / 21
Sources and dates
U.S. EPA fuel economy data, file of Sep 29, 2026
NHTSA owner complaints, file of Oct 18, 2026
NHTSA recalls, file of Oct 18, 2026
NHTSA manufacturer communications, file of Oct 18, 2026
NHTSA defect investigations, file of Oct 18, 2026
NHTSA 5-Star Safety Ratings, file of Aug 7, 2026
U.S. Energy Information Administration, file of Oct 12, 2026
Fuel cost: EPA mpg with fuel prices for the week of Oct 12, 2026 and electricity prices for Jul 2026. Source: U.S. Energy Information Administration (Oct 2026). Complaints are unverified reports owners filed with NHTSA. About the data