What is the 2021-2024 Cadillac CT5 GM 6.2L V8 Engine Recall for Connecting Rod Bearing Failure?

After widespread engine failures and an NHTSA investigation, GM recalled all 2021-2024 vehicles equipped with the 6.2L V8 engine including the CT5-V. The recall addresses potential connecting rod bearing failure that can cause engine seizure, stalling, or fire risk. The recall co… Repairs typically run $0-$0. Severity: high.

What is the 2020-2022 Cadillac CT5 Roof Rail Side-Curtain Airbag Incorrect Installation?

Certain 2020-2022 CT5 vehicles may have roof rail side-curtain airbags that were not installed correctly during manufacturing. The improper installation could result in the airbag not deploying properly during a side-impact crash, reducing occupant protection. This affects both V… Repairs typically run $0-$0. Severity: high.

What is the 2020-2024 Cadillac CT5 LT4 Supercharged V8 Premature Engine Failure?

The 6.2L supercharged LT4 V8 in CT5-V Blackwing models has experienced premature engine failures including bottom-end bearing failures, lifter collapse, and metal shavings found in oil. Failures have been reported as early as 5,000-15,000 miles. Car and Driver documented a catast… Repairs typically run $0-$15,000. Severity: high.

What is the 2020 Cadillac CT5 Electronic Brake Boost Module Failure — Loss of Brake Assist (2020 Recall)?

GM recalled 2020 Cadillac CT4, CT5 and XT4 vehicles because contamination introduced during the supplier's material production process can affect a sensor connection in the electronic brake-boost system. Under certain conditions, communication between the sensor and the brake-boo… Repairs typically run $0-$1,800. Severity: high.

What is the 2020-2024 Cadillac CT5 2.0T LSY Engine Timing Cover Oil Leak?

The 2.0T turbocharged four-cylinder (LSY) in the CT5 can develop oil leaks from the timing cover gasket. The gasket develops cracks after heat cycling, causing oil to seep from the front of the engine. In some cases, this leads to noticeable oil consumption between changes. GM re… Repairs typically run $500-$1,500. Severity: medium.

What is the 2020-2025 Cadillac CT5 Premature 12V Battery Drain / Parasitic Draw (Memory Seat Module)?

Owners report the 12V battery going dead when the car sits, with factory batteries dying in as little as two years. Beyond normal high parasitic draw of modern electronics, a recurring GM culprit is the driver-seat control module / Memory Seat Module (MSM), which can develop a se… Repairs typically run $250-$900. Severity: medium.

What is the 2024-2025 Cadillac CT5 Super Cruise 'Unavailable' Message — System Inoperative from Delivery?

Owners report Super Cruise repeatedly displays an 'Unavailable' message and cannot be activated; OnStar troubleshooting fails and dealers escalate to GM engineering with no ETA, citing PIC6557B (Super Cruise Unavailable Message, dated Sept. 25, 2024) . Multiple 2025 CT5 owners… Repairs typically run $0-$0. Severity: medium.

What is the 2020 Cadillac CT5 Electric Water Pump Circuit Board Failure — Overheat and Limp Mode?

GM issued a TSB (December 2020) stating the printed circuit board inside the electric water pump on affected CT4/CT5 vehicles may have been manufactured incorrectly, potentially causing a water pump failure; when this occurs the vehicle displays warnings as coolant temperatures… Repairs typically run $0-$1,400. Severity: medium.

What is the 2020-2025 Cadillac CT5 Infotainment / Center Display Freezing, Black Screen and Stalled Software Update (stuck at 99%)?

CT5 owners report the center infotainment display freezing, becoming unresponsive to touch, or hanging during an over-the-air or dealer-pushed software update — a common symptom is a black screen with a blue progress bar stuck at 99%. The condition is documented on a 2020 CT5 cas… Repairs typically run $0-$400. Severity: medium.

What is the 2020-2023 Cadillac CT5 Instrument Panel Cluster (IPC / Driver Information Center) Intermittent Blank Screen After Remote Start?

Owners report the digital Instrument Panel Cluster / Driver Information Center (the gauge/speedometer display) going completely blank for the remainder of an ignition cycle, most commonly on cycles that follow a remote start. GM addressed this in Technical Service Bulletin 21-NA-… Repairs typically run $75-$300. Severity: medium.

What is the 2020-2022 Cadillac CT5 10L80 10-Speed Torque Converter Clutch (TCC) Shudder at Light Throttle?

The CT5 pairs both its 2.0L turbo and 3.0L twin-turbo engines with a GM 10-speed automatic (10L80/10L90), which can develop a torque converter clutch (TCC) shudder felt as a vibration or 'rumble-strip' shake, typically at light throttle and steady cruise (roughly 25-55 mph) when… Repairs typically run $300-$2,500. Severity: medium.

What is the 2020-2025 Cadillac CT5 Auto Stop/Start Rough Restart with Brake and Stability Warning Lights?

CT5 owners report problems tied to the auto stop/start system: during an auto-restart, multiple warning lights (traction control, electronic brake system/EBS, and brake-related) can illuminate, the car can become hard to steer and slow to brake for a moment, and the engine can sh… Repairs typically run $0-$500. Severity: medium.

What is the 2020-2025 Cadillac CT5 2.0L Turbo (LSY) Excessive Oil Consumption and PCV System Failure?

Owners of four-cylinder CT5 550T (and CT4-shared LSY platform) models report higher-than-expected oil consumption, often exceeding GM's 'acceptable' threshold of one quart per ~2,000 miles. The valve-cover-integrated PCV system is a frequent contributor, and on worse cases worn p… Repairs typically run $150-$4,500. Severity: medium.

What is the 2020-2025 Cadillac CT5 Driver Seat Massage and Lumbar/Bolster Module Failure?

A widely reported CT5 interior failure: the driver-seat massage and adjustable lumbar/bolster functions stop working. Dealers diagnose this as a failed seat 'module' — an all-in-one air-pump, valve and electronics unit feeding the seat air bladders. Owners report the failure from… Repairs typically run $350-$1,200. Severity: medium.

What is the 2022-2024 Cadillac CT5 Tremec 6-Speed Manual 2nd Gear Notchiness and Difficulty?

CT5-V Blackwing models equipped with the Tremec TR-6060 6-speed manual transmission frequently exhibit difficulty and notchiness when shifting into 2nd gear. The issue occurs both when cold and when hot, particularly when downshifting from highway speeds. Some dealers have attrib… Repairs typically run $0-$4,000. Severity: low.

What is the 2020-2024 Cadillac CT5 Sunroof / Headliner Rattle and Creak?

Owners of sunroof-equipped CT5 models report creaking and rattling from the roof/sunroof and headliner area, especially over bumps and at speed. GM has a related sunroof-creak service bulletin (TSB 19-NA-096) that calls for dropping the headliner and torquing the sunroof module b… Repairs typically run $100-$600. Severity: low.

What is the 2020-2023 Cadillac CT5 Daytime Running Lights Won't Turn Off With Headlights (Recall 22V903 / N222386380)?

GM recalled certain 2020-2023 Cadillac CT4 and CT5 (along with 2021-2023 Buick Envision and 2022-2023 Cadillac Escalade/Escalade ESV, Chevrolet Silverado 1500/Suburban/Tahoe, and GMC Sierra 1500/Yukon/Yukon XL — 740,108 vehicles total) because the daytime running lamps may not de… Repairs typically run $0-$0. Severity: low.

Cadillac · Known Issues

2020-2025 Cadillac CT5 Problems: 24 Issues Every Owner Should Know

2020-2025 model years · 725+ owner reports · Updated July 2026

Share:@au7o.io

According to Au7o's analysis of 725+ owner reports, the 2020-2025 Cadillac CT5 has 24 documented known issues, with 7 rated critical. The most serious are GM 6.2L V8 Engine Recall for Connecting Rod Bearing Failure ($0-$0 repair), Roof Rail Side-Curtain Airbag Incorrect Installation ($0-$0 repair), LT4 Supercharged V8 Premature Engine Failure ($0-$15,000 repair), 10L80 Harsh Shifts and Check Engine Light with DTC P2812 or P2814 (Line Pressure Solenoid) ($0-$3,500 repair), Upper Intermediate Steering Shaft Chafes Front Brake Line (Service Update N202296840) ($0-$0 repair), Electronic Brake Boost Module Failure — Loss of Brake Assist (2020 Recall) ($0-$1,800 repair) and 10-Speed (10L80/10L90) Transmission Control Valve Wear Causing Momentary Wheel Lock-Up (Recall 25V-148) ($0-$3,500 repair). The most commonly reported issue is GM 6.2L V8 Engine Recall for Connecting Rod Bearing Failure with 320 owner reports. Across all issues, repair costs range from $75 to $15,000. at .

Frequently Asked Questions

What are the most common Cadillac CT5 problems?

According to Au7o's analysis of 725+ owner reports, the 2020-2025 Cadillac CT5 has 24 documented issues. The most frequently reported are: GM 6.2L V8 Engine Recall for Connecting Rod Bearing Failure, Roof Rail Side-Curtain Airbag Incorrect Installation, LT4 Supercharged V8 Premature Engine Failure. Of these, 7 are rated critical and should be addressed promptly.

Is the Cadillac CT5 reliable?

The 2020-2025 Cadillac CT5 has 24 known issues documented across 725+ owner reports. 7 issues are rated critical: GM 6.2L V8 Engine Recall for Connecting Rod Bearing Failure and Roof Rail Side-Curtain Airbag Incorrect Installation and LT4 Supercharged V8 Premature Engine Failure and 10L80 Harsh Shifts and Check Engine Light with DTC P2812 or P2814 (Line Pressure Solenoid) and Upper Intermediate Steering Shaft Chafes Front Brake Line (Service Update N202296840) and Electronic Brake Boost Module Failure — Loss of Brake Assist (2020 Recall) and 10-Speed (10L80/10L90) Transmission Control Valve Wear Causing Momentary Wheel Lock-Up (Recall 25V-148). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Cadillac CT5 problems?

Repair costs for known Cadillac CT5 issues range from $0 to $15,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, GM 6.2L V8 Engine Recall for Connecting Rod Bearing Failure, typically costs $0-$0 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What year Cadillac CT5 is the most reliable?

Reliability varies across model years of the Cadillac CT5. Based on documented issues, problems are most commonly reported in earlier model years. Au7o recommends checking the specific known issues for your target year before purchasing, and having a pre-purchase inspection performed by a qualified mechanic. Our known issues database covers the 2020-2025 Cadillac CT5 with 24 documented issues documented across 725+ owner reports.

All 24 Known Issues

Other Cadillac Models

Frequently Asked Questions

What are the most common Cadillac CT5 problems?

Is the Cadillac CT5 reliable?

How much does it cost to fix common Cadillac CT5 problems?

What year Cadillac CT5 is the most reliable?

When Issues Typically Appear

2020-2021 Cadillac CT5: 10L80 Harsh Shifts and Check Engine Light with DTC P2812 or P2814 (Line Pressure Solenoid)#

2020-2021 Cadillac CT5: 10-Speed (10L80/10L90) Transmission Control Valve Wear Causing Momentary Wheel Lock-Up (Recall 25V-148)#

2020-2022 Cadillac CT5: 10L80 10-Speed Torque Converter Clutch (TCC) Shudder at Light Throttle#

2022-2024 Cadillac CT5: Tremec 6-Speed Manual 2nd Gear Notchiness and Difficulty#

2020-2025 Cadillac CT5: 10-Speed Transmission Adaptive Learning and Shift Quality#

2021-2024 Cadillac CT5: GM 6.2L V8 Engine Recall for Connecting Rod Bearing Failure#

2020-2024 Cadillac CT5: LT4 Supercharged V8 Premature Engine Failure#

2020-2024 Cadillac CT5: 2.0T LSY Engine Timing Cover Oil Leak#

2020-2025 Cadillac CT5: 2.0L Turbo (LSY) Excessive Oil Consumption and PCV System Failure#

2020 Cadillac CT5: Upper Intermediate Steering Shaft Chafes Front Brake Line (Service Update N202296840)#

2020 Cadillac CT5: Electronic Brake Boost Module Failure — Loss of Brake Assist (2020 Recall)#

2020-2025 Cadillac CT5: Performance and Carbon-Ceramic Brake Squeal and Grinding Noise#

2020-2022 Cadillac CT5: Roof Rail Side-Curtain Airbag Incorrect Installation#

2020-2025 Cadillac CT5: Premature 12V Battery Drain / Parasitic Draw (Memory Seat Module)#

2024-2025 Cadillac CT5: Super Cruise 'Unavailable' Message — System Inoperative from Delivery#

2020-2025 Cadillac CT5: Infotainment / Center Display Freezing, Black Screen and Stalled Software Update (stuck at 99%)#

2020-2023 Cadillac CT5: Instrument Panel Cluster (IPC / Driver Information Center) Intermittent Blank Screen After Remote Start#

2020-2025 Cadillac CT5: Auto Stop/Start Rough Restart with Brake and Stability Warning Lights#

2020-2023 Cadillac CT5: Daytime Running Lights Won't Turn Off With Headlights (Recall 22V903 / N222386380)#

2020-2024 Cadillac CT5: Sunroof / Headliner Rattle and Creak#

2020-2024 Cadillac CT5: High-Speed Wind Noise / Whistle from Windshield A-Pillar Weatherstrip#

2020 Cadillac CT5: Electric Water Pump Circuit Board Failure — Overheat and Limp Mode#

2020-2025 Cadillac CT5: Driver Seat Massage and Lumbar/Bolster Module Failure#

2020-2024 Cadillac CT5: Gloss Black Exterior Trim (B-Pillar / Window Surround) Peeling and Delamination#