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…
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 | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 165 kg |
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.
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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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The L87 is engineered for durability, but its long-term reliability depends heavily on maintenance. The variable valve timing system is the most sensitive component, requiring strict oil change adherence. Vehicles maintained with correct oil and fuel can be very dependable over 200,000 km.
The most frequent issues are variable valve timing actuator faults, intake valve carbon buildup, water pump failures, and worn engine mounts. These are documented in GM service bulletins and NHTSA owner complaints.
The L87 engine is found in the Chevrolet Blazer (2023–Present) and the Cadillac XT4 (2024–Present). It is not used in any other GM models or licensed to other manufacturers.
Aftermarket ECU tuning is common on the L87 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.
Official figures are around 9.8 L/100km combined for FWD models. Real-world driving typically yields 10.5-12.5 L/100km (22-27 mpg US) depending on driving style and whether AWD is equipped. Highway cruising can achieve ~8.0 L/100km.
Yes. The GM L87 is an interference engine. If the timing chain fails or jumps, the pistons will collide with the open valves, causing catastrophic internal engine damage. Regular oil changes are vital for chain and VVT system longevity.
GM mandates dexos1 Gen 3 full synthetic oil, typically in 5W-30 viscosity. Using the correct specification is crucial for protecting the variable valve timing system, timing chain, and meeting emissions requirements. Change intervals are 10,000 km or 12 months.
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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