Is the 2018 Cadillac CT6 PLUG-IN HYBRID reliable?

The 2018 Cadillac CT6 PLUG-IN HYBRID has 5 complaints filed with NHTSA (0.5x the segment average). Our reliability verdict: above-average. Most common issue: ELECTRICAL problems.

What are common problems with the 2018 Cadillac CT6 PLUG-IN HYBRID?

Top problems: ELECTRICAL (1 complaints, avg repair $500); TRANSMISSION (1 complaints, avg repair $500); ELECTRONIC SYSTEMS (1 complaints, avg repair $500). Issues typically appear around 50K miles.

Are there any recalls on the 2018 Cadillac CT6 PLUG-IN HYBRID?

No recalls have been issued for the 2018 Cadillac CT6 PLUG-IN HYBRID.

How much does it cost to insure a 2018 Cadillac CT6 PLUG-IN HYBRID?

Estimated US average full-coverage insurance for the 2018 Cadillac CT6 PLUG-IN HYBRID is approximately $2,143/year (sedan-luxury class). Actual quotes vary heavily by state, driver age, driving record, and credit — see the interactive insurance estimator on this page for state-specific pricing.

2018 Cadillac CT6 PLUG-IN HYBRID

Problems, Recalls & Reliability Report

Above Average

Quick Summary

The 2018 Cadillac CT6 PLUG-IN HYBRID has 5 owner complaints filed with NHTSA — that's 0.5x the segment average of 11. The most common issue is electrical problems (20% of all complaints), specifically: right after purchase, the nav screen kept flickering, causing a distracted driver situation and a hazard. the dealer did everything they could per gm guidelines, but even after the 1st service visit, the car would shut down in drive mode, as the vehicle was in motion. then the vehicle would not shut.

Total Complaints

Recalls Issued

—/5

Safety Stars

0.5x

vs Segment Avg

Known Problems(top 5 of 5)

ELECTRICAL

1 complaints

20%

• RIGHT AFTER PURCHASE, THE NAV SCREEN KEPT FLICKERING, CAUSING A DISTRACTED DRIVER SITUATION AND A HAZARD. THE DEALER DID EVERYTHING THEY COULD PER GM GUIDELINES, BUT EVEN AFTER THE 1ST SERVICE VISIT, THE CAR WOULD SHUT DOWN IN DRIVE MODE, AS THE VEHICLE WAS IN MOTION. THEN THE VEHICLE WOULD NOT SHUT

Typical onset: 50K miles Est. repair: $500

“RIGHT AFTER PURCHASE, THE NAV SCREEN KEPT FLICKERING, CAUSING A DISTRACTED DRIVER SITUATION AND A HAZARD. THE DEALER DID EVERYTHING THEY COULD PER GM GUIDELINES, BUT EVEN AFTER THE 1ST SERVICE VISIT, THE CAR WOULD SHUT DOWN IN DRIVE MODE, AS THE VEHICLE WAS IN MOTION. THEN THE VEHICLE WOULD NOT SHUT”

— NHTSA complaint filing

Estimated Insurance Cost for 2018 Cadillac CT6 PLUG-IN HYBRID

Estimate only, not a quote. Modeled from NAIC + HLDI averages for a hypothetical 35-year-old driver with clean record + full coverage. Your actual quote depends heavily on your age, driving history, credit, ZIP code, and insurer.

Your state (affects local premium average)

Full coverage / year

$2,143

Full coverage / month

$179

Liability only / year

$710

vs US avg

+28%

How this estimate is calculated

US base full-coverage premium$1674

× state (US)1.00x

× vehicle class (sedan-luxury)1.28x

× theft risk1.00x

× safety rating1.00x

× vehicle age1.00x

= Full coverage estimate$2143

Coverage assumed: 100/300/100 liability + comprehensive/collision, $500 deductibles. Data sources: NAIC 2024 + HLDI loss studies.

Maintenance & Warranty

Cadillac New-Vehicle Warranty Coverage

Bumper-to-bumper (basic)

4 yr / 50K mi

Powertrain

6 yr / 70K mi

Hybrid/EV battery

8 yr / 100K mi

Corrosion (rust perforation)

6 yr / 100K mi

Roadside assistance

6 yr / 70K mi

These are the terms for a new Cadillac. If you're buying a used 2018 CT6 PLUG-IN HYBRID, remaining coverage is usually pro-rated from the vehicle's original in-service date. Not all coverage transfers between owners — check with a Cadillac dealer for VIN-specific remaining warranty.

Estimated Repair Costs

ELECTRICAL(~50K mi)

$500

TRANSMISSION(~50K mi)

$500

ELECTRONIC SYSTEMS(~50K mi)

$500

ENGINE(~50K mi)

$500

STEERING(~50K mi)

$500

Estimates based on average reported repair costs. Actual costs vary by location, shop, and severity.

🔍 Pre-Purchase Inspection Checklist

Based on 5 owner complaints for this specific year, here's what to check or ask about:

☐
ELECTRICAL: RIGHT AFTER PURCHASE, THE NAV SCREEN KEPT FLICKERING, CAUSING A DISTRACTED DRIVER SITUATION AND A HAZARD. THE DEALER DID EVERYTHING THEY COULD PER GM GUIDELINES, BUT EVEN AFTER THE 1ST SERVICE VISIT, THE CAR WOULD SHUT DOWN IN DRIVE MODE, AS THE VEHICLE WAS IN MOTION. THEN THE VEHICLE WOULD NOT SHUT
Typically appears around 50K miles. Repair cost ~$500
☐
TRANSMISSION: LOSS OF ALL VEHICLE POWER WHILE TRAVELING ON THE FREEWAY AT HIGHWAY SPEEDS. VEHICLE CHECK ENGINE, POWER LIMITED, AND ELECTRIC MOTOR OVERHEAT WARNING LIGHTS COME ON. THE COMBUSTION ENGINE WILL NOT START, AND BATTERY POWER AVAILABILITY GOES TO ZERO. THIS IS VERY DANGEROUS TO PUBLIC HEALTH AND SAFETY D
Typically appears around 50K miles. Repair cost ~$500
☐
ELECTRONIC SYSTEMS: MY ENGINE LIGHT IS ON AND THIS IS THE 15TH TIME I HAVE BOUGHT MY CAR IN FOR VARIOUS ENGINE PROBLEMS LIKE ENGINE POWER REDUCED AND OTHER PROBLEMS WITH THIS CAR. THE CAR WOULD JUST STOP IN THE MIDDLE OF THE RIDE OR JERKING AS I DRIVE IT. I HAVE BEEN ON THE HIGHWAY WHEN IT HAS STALLED BEFORE AS I DRIVE
Typically appears around 50K miles. Repair cost ~$500
☐
ENGINE: MY ENGINE LIGHT IS ON AND THIS IS THE 15TH TIME I HAVE BOUGHT MY CAR IN FOR VARIOUS ENGINE PROBLEMS LIKE ENGINE POWER REDUCED AND OTHER PROBLEMS WITH THIS CAR. THE CAR WOULD JUST STOP IN THE MIDDLE OF THE RIDE OR JERKING AS I DRIVE IT. I HAVE BEEN ON THE HIGHWAY WHEN IT HAS STALLED BEFORE AS I DRIVE
Typically appears around 50K miles. Repair cost ~$500
☐
General: Get a pre-purchase inspection from an independent mechanic ($100-$200)

Cadillac CT6 PLUG-IN HYBRID — Year Comparison

How does 2018 compare to other years? Fewer complaints = more reliable.

Full years-to-avoid analysis →

NHTSA Safety Rating

No NHTSA safety rating available

At a Glance

Complaints: 5
Recalls: 0
Fire reports: 0
Crash reports: 0
Injury reports: 0
Segment avg: 11

Check a Specific VIN

See recalls for YOUR 2018 Cadillac CT6 PLUG-IN HYBRID

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