The CADILLAC LXG is a 3,564 cc, V6 naturally aspirated petrol engine produced between 2021 and 2025. It features DOHC, 24 — valve configuration and General Motors' High Feature V6 architecture, delivering 235 kW (320 PS) and 367 Nm of torque. Its compact design and aluminum block construction provide smooth power delivery and weight efficiency in luxury applications.
Fitted to the CT5 and XT5, the LXG was engineered for refined cruising and balanced performance in Cadill…
All production years 2021–2025 meet OBD-II and Euro 6 emissions standards .
The CADILLAC LXG is a 3,564 cc V6 naturally aspirated petrol engine engineered for mid-size luxury sedan and SUV applications (2021–2025). It combines aluminum construction with dual overhead camshafts to deliver smooth power delivery and quiet operation. Designed to meet OBD-II and Euro 6 standards, it balances refinement with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 3,564 cc | |
Fuel type | Petrol | |
Configuration | V6, DOHC, 24-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 94.0 mm × 85.0 mm | |
Power output | 235 kW (320 PS) @ 6,800 rpm | |
Torque | 367 Nm @ 4,500 rpm | |
Fuel system | Bosch direct injection (up to 150 bar) | |
Emissions standard | OBD-II, Euro 6 | |
Compression ratio | 11.3:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Double-row timing chain | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 189 kg |
The CADILLAC LXG was used across CADILLAC's CT5 and XT5 platforms with longitudinal mounting. This engine received platform-specific adaptations-integrated oil cooler in the CT5 Premium and revised intake manifolds in the XT5 Sport-and from 2025 the CT5 LCI adopted the LXG-T variant with updated engine management, creating interchange limits. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The LXG offers smooth performance and solid engineering, but pre-2023 models with original CCV systems are prone to carbon buildup. Later revisions with upgraded oil separation significantly improve durability. Regular oil changes, use of correct oil (5W-30 GM dexos1), and prompt attention to idle quality are essential for reliability.
Key issues include intake manifold carbon buildup (especially pre-2023), cooling system failures (thermostat, water pump), camshaft/lifter wear, and oil leaks from valve cover and rear main seal. These are documented in GM service bulletins and require OEM-specified parts for proper repair.
The LXG was used in the CT5 (2021–2025) and XT5 (2022–2025). It was replaced by the LXG-T in 2025 with twin-turbocharging and updated engine management. No cross-manufacturer applications are documented for this variant.
Aftermarket ECU tuning is common on the LXG platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
In a CT5, combined consumption is ~10.5 L/100km (27 mpg UK). City driving may see 12–14 L/100km (24–20 mpg), while highway cruising can achieve ~8.0 L/100km (35 mpg). Real-world figures depend on driving style and vehicle condition.
Yes. The LXG series is an interference engine. If the timing chain fails or jumps, pistons will contact open valves, causing catastrophic internal damage. Chain maintenance and tensioner inspection are critical, especially given the engine's high-RPM operation.
GM specifies 5W-30 synthetic oil meeting dexos1 Gen 2 spec. Change intervals should not exceed 15,000 km. Proper oil ensures adequate protection for camshafts, lifters, and the timing chain, especially under sustained high-RPM use.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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