2024 Cadillac CT4 Problems: 4 Issues Every Owner Should Know
2024 model year · 185+ owner reports · Updated April 2026
According to Au7o's analysis of 185+ owner reports, the 2024 Cadillac CT4 has 4 documented known issues. No issues are rated critical, indicating generally reliable ownership. Across all issues, repair costs range from $0 to $3,500. DIY maintenance guides at au7o.io.
All 4 Known Issues
On the 2022-2024 Cadillac CT4 2.7L Turbo V6, cT4-V Blackwing models with the 2.7L twin-turbo V6 (L3B) can develop a squeaking or squelching noise during acceleration, particularly once the engine is warm. The noise is often traced to turbocharger-related components including wastegate actuators, boost pipes, or turbo bearings. Some cases have required turbo replacement under warranty. The issue varies in severity from cosmetic noise to indicating actual component wear.
Common Symptoms
- Squealing or squelching sound during acceleration
- Noise appears or worsens once engine is fully warm
- Whistling sound under boost that is abnormal
- Slight decrease in boost pressure on higher mileage examples
- Oil residue around turbo connections or intercooler piping
How to Fix
Have dealer diagnose the specific source of the noise. In many cases, tightening boost pipe clamps or replacing wastegate actuator resolves the issue. If turbo bearings are worn, warranty replacement of the turbocharger assembly is needed. Document the noise with video for the dealer visit.
What Owners Are Using
Parts and tips from 55+ owners who fixed this issue
- TipRecord a video of the noise with the hood open during acceleration. Dealers often struggle to replicate intermittent turbo noises. A good recording speeds up diagnosis. Check all boost pipe clamps first - they can loosen from heat cycling
- TipThe 2.7L twin-turbo is the same L3B engine used in the Silverado and CT4-V. Some turbo noise under hard acceleration is normal. Abnormal sounds include metallic scraping, loud whistling at idle, or squelching that correlates with throttle position
- UpgradeTurbo gasket kit prevents boost leaks and oil seepage at the turbo flanges (Dorman Turbocharger Gasket Kit)
- UpgradeBoost gauge helps monitor turbo performance and catch problems early (AutoMeter Mechanical Boost Gauge)
On the 2022-2024 Cadillac CT4, some CT4-V Blackwing models with the 10-speed automatic transmission experience intermittent stalling and rough idle in stop-and-go traffic conditions. The engine may die at standstill and require restart. Reports indicate this occurring within the first 1,000 miles on new vehicles, suggesting a calibration issue rather than mechanical failure. GM has released preliminary engineering bulletins (PIE0744) for the 10-speed automatic in Blackwing models.
Common Symptoms
- Engine stalls at idle in traffic
- Rough or unstable idle when stopped
- RPM drops below normal idle speed before recovering
- Vehicle requires restart after dying at a light
- Issue more common in hot weather or after sustained highway driving
How to Fix
Have dealer check for latest ECM and TCM calibration updates. GM preliminary bulletin PIE0744 addresses idle and stall concerns on A10 Blackwing models. A TCM reflash typically resolves the stalling. If persistent, the throttle body and idle air control may need cleaning or replacement.
What Owners Are Using
Parts and tips from 40+ owners who fixed this issue
- TipAsk the dealer specifically about PIE0744 and any ECM/TCM calibration updates for the 10-speed automatic Blackwing. A software reflash is usually free under warranty and resolves the intermittent stalling in stop-and-go traffic
- UpgradeThrottle body cleaner can resolve hesitation and idle issues (CRC Throttle Body Cleaner)
- UpgradeReplacement throttle body for units with failed motors or sensors (Dorman Throttle Body Assembly)
On the 2020-2025 Cadillac CT4, the CT4 base model uses the 2.0T LSY engine which shares the valve cover/PCV failure and turbo coolant line concerns found in the XT4. The PCV system integrated into the valve cover can fail between 40,000-80,000 miles, causing oil consumption, vacuum leaks, and rough idle. Turbo coolant line connections can develop slow leaks. The CT4-V uses a 2.7T engine (L3B) with different issues. The CT4-V Blackwing uses the 3.6L Twin-Turbo (LF4) which is bespoke and generally reliable.
Common Symptoms
- Check engine light with misfire or lean codes
- Excessive oil consumption
- Rough idle
- Coolant level dropping slowly
- Turbo-related noises or performance changes
How to Fix
Replace valve cover assembly for PCV failure (GM updated design available). Inspect and replace turbo coolant lines if leaking. 5,000-mile oil change intervals with full synthetic are important for turbo longevity.
What Owners Are Using
Parts and tips from 0+ owners who fixed this issue
- TipSame LSY 2.0T turbo as XT4. GM Turbocharger Coolant Feed Pipe (12691901) plus gasket (55504552) are the primary failure points. Inspect at every oil change for coolant weeping around turbo area. Replace preventively at 60,000 miles
- TipGM PCV Valve 55514392 is the same LSY-specific part across all applications (CT4, XT4, Equinox, Malibu). PCV failure symptoms: excessive oil consumption, check engine light, boost pressure codes. Relatively inexpensive part ($30-50) but labor can be $200+ at dealer
- Tip5,000-mile oil change intervals with dexos1 Gen 3 0W-20 are critical for LSY turbo longevity. Monthly coolant level checks catch turbo coolant line leaks early. The CT4-V Blackwing uses a different engine (LF4 3.6TT) and is NOT affected by these LSY-specific issues
- UpgradeTurbo gasket kit prevents boost leaks and oil seepage at the turbo flanges (Dorman Turbocharger Gasket Kit)
- UpgradeBoost gauge helps monitor turbo performance and catch problems early (AutoMeter Mechanical Boost Gauge)
On the 2022-2024 Cadillac CT4, cT4-V and CT5-V Blackwing owners have reported various build quality concerns including excessive paint orange peel, panel gap inconsistencies, interior trim rattles and squeaks, and loose exterior trim pieces. Despite the premium price point ($60,000-$90,000+), the hand-finished aspects of these performance sedans have not consistently met owner expectations. Issues are more commonly reported on early 2022 production vehicles.
Common Symptoms
- Excessive paint orange peel visible in direct sunlight
- Uneven panel gaps between body panels
- Interior trim squeaks and rattles over rough roads
- Loose exterior trim pieces or badges
- Wind noise from improperly sealed windows or doors
How to Fix
Document all issues thoroughly with photos during the initial delivery inspection. Report paint quality issues within 30 days of purchase for potential warranty paint correction. Interior rattles can often be resolved with dealer adjustments to trim clips and sound deadening. Check Cadillac V-Net forums for specific rattle locations and DIY fixes.
What Owners Are Using
Parts and tips from 90+ owners who fixed this issue
- TipDo a thorough pre-delivery inspection before accepting the car. Check paint quality in direct sunlight, verify all panel gaps are even, and test drive over rough roads to identify rattles. Any issues found at delivery are much easier to resolve under warranty
- UpgradeDupli-Color touch-up paint kit for scratch and chip repair (Dupli-Color Touch-Up Paint Kit)
- UpgradeDupli-Color clear coat finish for paint protection (Dupli-Color Clear Coat Spray)