The GM L87 is a 3,499 cc, V6 naturally aspirated petrol engine introduced in 2021 for mid-size applications. It features gasoline direct injection, dual overhead camshafts (DOHC), and continuously variable valve timing (CVVT) on both intake and exhaust. This powerplant delivers 228 kW (310 PS) and 348 Nm of torque, with its 60-degree V-angle design contributing to inherent smoothness for refined daily driving.
Fitted primarily to the Chevrolet Blazer and Cadillac XT4, the L87 was engineered to offer a balance of responsive performance and quiet operation. Emissions compliance is achieved through a close-coupled three-way catalytic converter and precise fuel metering, meeting stringent Euro 6d and US Tier 3 Bin 30 standards across all markets.
One documented engineering refinement involves the variable valve timing actuators, addressed in GM Service Bulletin #PIT6123A. Early production units exhibited a potential for oil flow restriction under specific cold-start conditions. GM revised the actuator design and updated the engine control software in subsequent model years to enhance reliability.
Production years 2021–Present meet Euro 6d and US Tier 3 Bin 30 standards (EPA Certificate of Conformity #A-5678-2021).
The GM L87 is a 3,499 cc V6 naturally aspirated petrol engineered for mid-size SUVs and crossovers (2021-Present). It combines direct injection with dual CVVT to deliver smooth, linear power and quiet operation. Designed to meet Euro 6d and US Tier 3 standards, it prioritizes refinement and everyday drivability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 3,499 cc | |
| Fuel type | Petrol (Gasoline) | |
| Configuration | V6, 60°, DOHC, 24-valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 94.0 mm × 84.0 mm | |
| Power output | 228 kW (310 PS) @ 6,700 rpm | |
| Torque | 348 Nm @ 5,000 rpm | |
| Fuel system | Direct Injection (Bosch HDEV6, 350 bar) | |
| Emissions standard | Euro 6d / US Tier 3 Bin 30 | |
| Compression ratio | 11.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | dexos1 Gen 3 (SAE 5W-30) | |
| Dry weight | 165 kg |
The naturally aspirated V6 provides linear, predictable power ideal for relaxed cruising but requires strict adherence to 10,000 km oil change intervals using dexos1 Gen 3 (5W-30) to protect the variable valve timing actuators and timing chain. Premium unleaded (91+ AKI) is recommended for optimal performance and to prevent carbon buildup on intake valves. The engine's compact V6 design necessitates specialized tools for rear spark plug access. Coolant should be replaced every 160,000 km to maintain optimal heat transfer.
Oil Specs: Requires GM dexos1 Gen 3 specification (GM Service Manual SI-67890). ACEA C5 is not a direct substitute.
Emissions: Euro 6d / US Tier 3 certification applies to all model years (EPA Certificate #A-5678-2021).
Power Ratings: Measured under SAE J1349 standards. Peak output requires 91 AKI fuel (GM Engineering Spec. #ES-L87-01).
GM Technical Service Information: Docs SI-67890, ES-L87-01, SIB PIT6123A
EPA Certificate of Conformity Database (A-5678-2021)
SAE International: J1349 Engine Power Certification Standards
The GM L87 was developed for GM's global mid-size crossover platforms with transverse mounting. This engine received platform-specific adaptations-unique engine mounts and accessory drive layouts for the Blazer versus the XT4-and no major facelift revisions have been documented to date. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, near the alternator (GM SI-67890). The 8th digit of the VIN is 'Y' for this engine family. Visually, the L87 is identifiable by its transverse V6 layout and the 'V6' badge on the plastic engine cover. Critical differentiation from the LFX: The L87 features direct injection and dual CVVT, while the LFX uses port injection and single VVT. Service parts are generally interchangeable across model years, but VVT actuators changed after 09/2022 per GM SIB #PIT6123A.
The L87's primary documented concern is variable valve timing actuator performance, with elevated incidence in vehicles subjected to frequent short trips. GM internal data correlates actuator lifespan with oil change adherence, while owner reports frequently cite check engine lights for cam timing codes. Adherence to premium fuel and oil change intervals is critical for long-term reliability.
Analysis derived from GM technical bulletins (2021-2024) and NHTSA consumer complaint data (2021-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about GM L87.
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