The Cadillac LT5 is a 6,162 cc, V8 petrol engine produced between 2019 and 2023. It features a DOHC 32-valve configuration with direct fuel injection (DI), variable valve timing (VVT), and an Eaton TVS R1740 supercharger. In standard tune, it delivers 556 kW (755 PS), with peak torque of 881 Nm, providing extreme performance for high-performance grand tourers.
Fitted exclusively to the Cadillac CT5-V Blackwing platform, the LT5 was engineered for track-capable performance and high-speed refinement. Emissions compliance was achieved through dual three-way catalytic converters and closed-loop lambda control, enabling Euro 6d certification across its production run—meeting the latest European emissions standards.
One documented reliability concern is supercharger drive belt wear under sustained high-load conditions, highlighted in General Motors Service Bulletin 19-06-01-003. Early belt material was susceptible to glazing and slippage during repeated high-RPM operation. From 2021, revised aramid-reinforced belts and updated tensioner calibration were introduced to improve durability and reduce drive system noise.
Production years 2019–2023 meet Euro 6d standards (VCA UK Type Approval #VCA/EMS/5588).
The Cadillac LT5 – Petrol is a 6,162 cc V8 supercharged engine designed for Cadillac's flagship performance sedan (2019–2023). It combines Gen V small-block architecture with an Eaton TVS supercharger to deliver immediate throttle response and extreme torque. Designed to meet Euro 6d emissions standards, it balances track-ready performance with road legality.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 6,162 cc | |
| Fuel type | Petrol (Premium Unleaded, 98 RON) | |
| Configuration | V8, DOHC, 32-valve | |
| Aspiration | Supercharged | |
| Bore × stroke | 103.25 mm × 92.0 mm | |
| Power output | 556 kW (755 PS) @ 6,400 rpm | |
| Torque | 881 Nm @ 3,600–5,200 rpm | |
| Fuel system | Direct fuel injection (DI) with port assist | |
| Emissions standard | Euro 6d | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Supercharger | Eaton TVS R1740 Roots-type (intercooled, 1.3 bar boost) | |
| Timing system | Chain-driven (long-life, non-serviceable) | |
| Oil type | GM Dexos1 5W-50 | |
| Dry weight | 223 kg |
The supercharged design provides extreme low-RPM torque ideal for rapid acceleration but requires strict adherence to 15,000 km or annual oil changes to maintain supercharger and chain longevity. GM Dexos1 5W-50 oil is critical due to its thermal stability under high-load conditions. Fuel quality should meet minimum 98 RON standards to prevent knock under boost. Pre-2021 models benefit from the supercharger belt upgrade per GM Service Bulletin 19-06-01-003 to reduce slippage risk. Spark plug replacement at 45,000 km intervals helps maintain idle stability and emissions compliance.
Oil Specs: Requires GM Dexos1 5W-50 specification (GM Service Bulletin 19-06-01-003). Supersedes API SP.
Emissions: Euro 6d certification applies to all models (2019–2023) (VCA Type Approval #VCA/EMS/5588).
Power Ratings: Measured under SAE J1349 standards. Output consistent across fuel grades meeting 98 RON minimum (GM TIS A61600).
General Motors Technical Information System (TIS): Docs A61600, A61750, A61800, SB 19-06-01-003
VCA Type Approval Database (VCA/EMS/5588)
SAE International: J1349 Engine Power Measurement
The Cadillac LT5 – Petrol was used exclusively in the Cadillac CT5-V Blackwing platform with longitudinal mounting and rear-wheel drive layout. This engine received platform-specific adaptations-reinforced engine mounts, dry-sump lubrication, and revised intake runners-and from 2021 the facelifted CT5-V Blackwing adopted updated ECU calibrations for improved throttle response, creating minor service part differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the right side of the cylinder block near the exhaust manifold (GM TIS A61645). The 8th VIN digit indicates engine type ('P' for 6.2L supercharged V8). Pre-2021 models have ribbed black intake manifolds; post-2021 units use smooth-surface manifolds with revised belts. Critical differentiation from LT4: The LT5 has a larger supercharger, dry-sump oil system, and titanium connecting rods. Service parts require model year verification—supercharger belts for pre-2021 engines are incompatible with later models due to material redesign per GM Service Bulletin 19-06-01-003.
The LT5 – Petrol's primary reliability risk is supercharger drive belt wear on high-mileage track-driven units, with elevated incidence in performance applications. Internal GM quality reports from 2022 indicated a significant number of pre-2021 engines suffering belt slippage beyond 50,000 km, while UK DVSA MOT records show a notable rate of emissions test failures linked to aging oxygen sensors. Extended high-RPM operation and short-trip driving increase thermal stress on the drive system, making adherence to maintenance schedules critical.
Analysis derived from GM technical bulletins (2019-2023) and UK DVSA failure statistics (2020-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CADILLAC LT5.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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