Is the 2017 Cadillac CT6 reliable?

The 2017 Cadillac CT6 has 28 complaints filed with NHTSA (1.8x the segment average). Our reliability verdict: below-average. Most common issue: TRANSMISSION problems.

What are common problems with the 2017 Cadillac CT6?

Top problems: TRANSMISSION (10 complaints, avg repair $500); ELECTRICAL (4 complaints, avg repair $500); SPEED CONTROL (3 complaints, avg repair $500). Issues typically appear around 50K miles.

Are there any recalls on the 2017 Cadillac CT6?

Yes, there are 2 recall(s): SEATS:MID/REAR ASSEMBLY, EXTERIOR LIGHTING. Contact any Cadillac dealer to verify if recalls have been completed on your specific vehicle.

How much does it cost to fuel a 2017 Cadillac CT6?

The 2017 Cadillac CT6 gets 25 MPG combined. At current US average gas prices, driving 12,000 miles per year costs roughly $1920. See the interactive fuel cost calculator on this page for state-specific pricing.

How much does it cost to insure a 2017 Cadillac CT6?

Estimated US average full-coverage insurance for the 2017 Cadillac CT6 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.

2017 Cadillac CT6

Problems, Recalls & Reliability Report

Below Average

Quick Summary

The 2017 Cadillac CT6 has 28 owner complaints filed with NHTSA — that's 1.8x the segment average of 16. The most common issue is transmission problems (36% of all complaints), specifically: when auto stop is engage taking your foot off the brake pedal from a complete stop when the engine starts back up it has a harsh jerk sometimes, it feels as though someone has hit you from the rear. this been going on for three years the car has been in service twice for this problem the service tec. There are 2 recalls issued for this model year.

Total Complaints

Recalls Issued

—/5

Safety Stars

1.8x

vs Segment Avg

Known Problems(top 5 of 8)

TRANSMISSION

10 complaints

36%

• WHEN AUTO STOP IS ENGAGE TAKING YOUR FOOT OFF THE BRAKE PEDAL FROM A COMPLETE STOP WHEN THE ENGINE STARTS BACK UP IT HAS A HARSH JERK SOMETIMES, IT FEELS AS THOUGH SOMEONE HAS HIT YOU FROM THE REAR. THIS BEEN GOING ON FOR THREE YEARS THE CAR HAS BEEN IN SERVICE TWICE FOR THIS PROBLEM THE SERVICE TEC
• MY 2017 CADILLAC CT6 3.0 TT PREMIUM LUXURY HAS HAD THIS ISSUE SINCE I PURCHASED IT. DEALERSHIP STATE THAT THIS IS NORMAL AND I SHOULD LIVE WITH IT. IF I KNEW THIS BEFORE I PURCHASE THIS $98,000 VEHICLE I WOULD HAVE GONE MERCEDES-BENZ. THE ISSUES WITH THE 8-SPEED 8L90 GM TRANSMISSION ARE TWO-FOLD.
• The contact owns a 2017 Cadillac CT6. The contact stated that while driving at various speeds, the vehicle would hesitate upon depression of the accelerator pedal without warning. The contact had taken the vehicle to a dealer where they initially changed the transmission fluid and reprogrammed the t

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

“WHEN AUTO STOP IS ENGAGE TAKING YOUR FOOT OFF THE BRAKE PEDAL FROM A COMPLETE STOP WHEN THE ENGINE STARTS BACK UP IT HAS A HARSH JERK SOMETIMES, IT FEELS AS THOUGH SOMEONE HAS HIT YOU FROM THE REAR. THIS BEEN GOING ON FOR THREE YEARS THE CAR HAS BEEN IN SERVICE TWICE FOR THIS PROBLEM THE SERVICE TEC”

— NHTSA complaint filing

Recalls (2)

SEATS:MID/REAR ASSEMBLY28/06/2018

General Motors LLC (GM) is recalling certain 2016-2018 Cadillac CT6 vehicles. The inboard child seat anchorage bars may have had excess structural adhesive applied during assembly, which can interfere with the installation of a child seat. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 225, "Child Restraint Anchorage Systems."

Risk: If the child seat cannot be attached correctly to the anchorage bar, there is an increased the risk of injury.

Fix: GM will notify owners, and dealers will inspect, remove any excess adhesive, and apply anti-corrosion primer to the inboard child seat anchorage bars, free of charge. The recall began August 3, 2018. Owners may contact Cadillac customer service at 1-800-458-8006. GM's number for this recall is 18228.

Fuel Cost Calculator for 2017 Cadillac CT6

Live EIA prices

Annual miles driven: 12,000

Your state (affects local gasoline price)

Per year

$1,920

Per month

$160

Per mile

16.0¢

MPG

City driving (worst-case MPG)

$2,182/yr

Highway driving (best-case MPG)

$1,600/yr

Based on EPA fuel-economy ratings and EIA weekly retail prices (2026-07-20). Real-world cost varies with driving style, trim/engine, terrain, and traffic.

5-Year Gas Price History

EIA weekly retail data · 2021 → today

Show:

Current

$4.00

5-year low

$2.78

5-year high

$5.01

Since 2021

+27%

Source: US Energy Information Administration weekly retail gasoline prices.

Estimated Insurance Cost for 2017 Cadillac CT6

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 2017 CT6, 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

TRANSMISSION(~50K mi)

$500

ELECTRICAL(~50K mi)

$500

SPEED CONTROL(~50K mi)

$500

BRAKES(~50K mi)

$500

ENGINE(~50K mi)

$500

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

🔍 Pre-Purchase Inspection Checklist

Based on 28 owner complaints for this specific year, here's what to check or ask about:

☐
TRANSMISSION: WHEN AUTO STOP IS ENGAGE TAKING YOUR FOOT OFF THE BRAKE PEDAL FROM A COMPLETE STOP WHEN THE ENGINE STARTS BACK UP IT HAS A HARSH JERK SOMETIMES, IT FEELS AS THOUGH SOMEONE HAS HIT YOU FROM THE REAR. THIS BEEN GOING ON FOR THREE YEARS THE CAR HAS BEEN IN SERVICE TWICE FOR THIS PROBLEM THE SERVICE TEC
Typically appears around 50K miles. Repair cost ~$500
☐
ELECTRICAL: WHEN YOU PT IN THE REVERVE THE OUT SIDE MIRRORS DID NOT TILTED , AND SOME TIME THE PARKING BREAK LIGHT ON
Typically appears around 50K miles. Repair cost ~$500
☐
SPEED CONTROL: These vehicles have an issue tbat GM is aware of, with their 8 speed automatic transmissions which are used in multiple GM vehicles and these cause safety issues because for instance my vehicle switches gears randomly almost causing a wreck, and shuttering, and even slipping and when this happens th
Typically appears around 50K miles. Repair cost ~$500
☐
BRAKES: WHEN YOU PT IN THE REVERVE THE OUT SIDE MIRRORS DID NOT TILTED , AND SOME TIME THE PARKING BREAK LIGHT ON
Typically appears around 50K miles. Repair cost ~$500
☐
RECALLS: Verify all 2 recalls have been completed — free at any Cadillac dealer
☐
General: Get a pre-purchase inspection from an independent mechanic ($100-$200)