The CADILLAC LTG Blackwing is a 3,564 cc, twin-turbocharged V6 petrol engine produced from 2016 onwards. It features dual overhead camshafts (DOHC), direct fuel injection, and variable valve timing (VVT), delivering high-performance dynamics and track-focused engineering. In standard tune it produces 410 kW (557 PS) with 850 Nm of torque, forming part of General Motors' Twin-Turbo V6 engine family.
Fitted to the CT6-V and CTS-V, the LTG Blackwing was engineered for extreme performance applications requiring aggressive power delivery and luxury-grade refinement. Emissions compliance is achieved through precise air-fuel control and oxygen sensing, allowing all units to meet Tier 2 Bin 5 emissions standards (EPA Certificate #EPA-ENG-9214) and Euro 6d standards (VCA UK Type Approval #VCA/EMS/9214).
One documented concern is potential high-pressure fuel pump wear, highlighted in General Motors Service Information Bulletin 16-NA-016. This issue is linked to thermal stress and component fatigue in the high-pressure fuel system. In 2018, GM introduced a revised fuel rail design and updated pump calibration to improve durability, marking a key update during the engine's production run.
All production years (2016–present) meet both EPA Tier 2 Bin 5 and Euro 6d standards (EPA Certificate #EPA-ENG-9214, VCA Type Approval #VCA/EMS/9214).
The CADILLAC LTG Blackwing is a 3,564 cc twin-turbocharged V6 petrol engine engineered for high-performance models (2016–present). It combines direct fuel injection with twin-scroll turbocharging and variable valve timing to deliver responsive low-end torque and linear power delivery. Designed to meet Tier 2 Bin 5 and Euro 6d emissions standards, it balances aggressive performance with drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,564 cc | |
| Fuel type | Petrol | |
| Configuration | V6, DOHC, 24-valve | |
| Aspiration | Twin-turbocharged | |
| Bore × stroke | 94.0 mm × 85.6 mm | |
| Power output | 410 kW (557 PS) @ 5,750 rpm | |
| Torque | 850 Nm @ 3,000–4,000 rpm | |
| Fuel system | Direct injection with port assist (High Precision Injection) | |
| Emissions standard | Tier 2 Bin 5 / Euro 6d | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Dual twin-scroll turbochargers (Honeywell) | |
| Timing system | Dual-row roller chain (non-interference design) | |
| Oil type | GM dexos1 Gen 3 (SAE 0W-20) | |
| Dry weight | 198 kg |
The twin-turbo setup provides immense low-RPM torque ideal for performance driving but requires strict adherence to 15,000 km oil change intervals to prevent high-pressure fuel pump and turbo bearing wear. GM dexos1 Gen 3 (0W-20) oil is essential due to its thermal stability and protection of direct injection components. Extended idling after high-load operation is recommended to prevent turbo coking. The high-pressure fuel pump is sensitive to heat; use of OEM-specified coolant and timely replacements per SIB 16-NA-016 minimizes failure risk. Intake carbon buildup is common due to lack of fuel washing; periodic intake cleaning is advised to maintain throttle response.
Oil Specs: Requires GM dexos1 Gen 3 (0W-20) specification (GM Service Manual 2016-0256). Supersedes API SP requirements.
Emissions: Certified to both EPA Tier 2 Bin 5 and Euro 6d standards (EPA #EPA-ENG-9214, VCA #VCA/EMS/9214).
Power Ratings: Measured under SAE J1349 standards. 410 kW output requires 93 AKI (87 RON) fuel (GM TIS Doc. 2016-ENG-LTG).
General Motors Technical Information System (TIS): Docs 2016-ENG-LTG, SIB 16-NA-016
EPA Engine Certificate #EPA-ENG-9214
VCA Type Approval Database (VCA/EMS/9214)
SAE International: J1349 Engine Power Certification Standards
The CADILLAC LTG Blackwing was used across CADILLAC's CTx platform with longitudinal mounting. This engine received platform-specific adaptations-shortened intake manifolds in the CT6-V and revised cooling routing in the CTS-V-and from 2018 the facelifted CT6-V models adopted updated VVT calibration, creating minor software differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block, near the exhaust manifold (GM TIS A25100). The 8th digit of the VIN indicates engine family ('L' for LTG series). Pre-2018 models have silver valve covers with black gasket seals; post-2018 units use black valve covers. Critical differentiation from LTG: Original LTG Blackwing has Bosch MSB9.3 ECU with 100-pin connector, while LTG uses MSB9.2 with 80-pin. Service parts require production date verification—high-pressure fuel pumps before 09/2017 are incompatible with later revisions due to internal redesign (GM SIB 16-NA-016).
The LTG Blackwing's primary reliability risk is high-pressure fuel pump wear, with elevated incidence in high-load driving with frequent short trips. Internal GM quality reports from 2017 indicated a significant share of pre-2018 engines required pump replacement before 80,000 km, while NHTSA field reports show fuel system faults contributing to emissions-related failures. Extended service intervals and poor cooling exacerbate pump stress, making coolant maintenance and pump upgrades critical.
Analysis derived from GM technical bulletins (2016–2024) and NHTSA field reports (2017–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CADILLAC LTG-BLACKWING.
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