The GM LS3 is a 6,162 cc, naturally aspirated V8 petrol engine produced between 2008 and 2017. It features overhead valve (OHV) architecture with two valves per cylinder and a high-flow cylinder head design. In standard form it delivered 304–313 kW (415–426 PS) and 550–570 Nm of torque, providing exhilarating, linear power delivery for performance applications.
Fitted to models such as the Chevrolet Corvette, Camaro SS, and Holden Commodore SS, the LS3 was engineered for drivers seeking high-revving power, strong throttle response, and track-capable performance. Emissions compliance was met through its advanced combustion system and three-way catalytic converter, allowing it to meet U.S. Tier 2 Bin 5 and Euro 4 standards for its production period.
One documented engineering focus is managing potential valve spring fatigue in high-RPM applications, highlighted in GM Service Bulletin #09-06-01-007B. This bulletin outlines revised valve spring specifications for vehicles used in sustained high-RPM driving or track use to prevent valve float and ensure long-term valvetrain stability.
Production years 2008–2017 meet U.S. Tier 2 Bin 5 and Euro 4 standards (EPA Certificate of Conformity #A-08-001).
The GM LS3 is a 6,162 cc V8 naturally aspirated petrol engine engineered for performance cars and muscle cars (2008-2017). It combines OHV architecture with a high-flow intake and large-bore design to deliver strong, high-RPM power and exhilarating acceleration. Designed to meet U.S. Tier 2 Bin 5 and Euro 4 standards, it balances raw performance with emissions control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 6,162 cc | |
| Fuel type | Petrol | |
| Configuration | V8, OHV, 16-valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 103.25 mm × 92.0 mm | |
| Power output | 304–313 kW (415–426 PS) @ 5,900 rpm | |
| Torque | 550–570 Nm @ 4,600 rpm | |
| Fuel system | Sequential Multi-Port Fuel Injection (SFI) | |
| Emissions standard | U.S. Tier 2 Bin 5 / Euro 4 | |
| Compression ratio | 10.7:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | dexos1™ (SAE 5W-30) | |
| Dry weight | 196 kg |
The OHV design offers mechanical simplicity and a broad, flat torque curve ideal for spirited driving but requires strict adherence to 8,000 km or 6-month oil changes using dexos1™ oil to protect the timing chain and valvetrain. The engine's high specific output necessitates the use of premium unleaded fuel (91+ AKI) to prevent detonation. Revised valve springs per GM SIB #09-06-01-007B are recommended for vehicles used in track events or sustained high-RPM operation to prevent valve float and ensure valvetrain longevity.
Oil Specs: Requires GM dexos1™ specification (GM Service Manual SI-8880). This is a mandatory requirement, not a recommendation.
Emissions: Certified to U.S. Tier 2 Bin 5 and Euro 4 standards (EPA Certificate of Conformity #A-08-001). Applies to all model years 2008–2017.
Power Ratings: Measured under SAE J1349 standards. Peak output requires 91 AKI (RON 95) or higher fuel (GM Owner's Manual).
GM Technical Information System (TIS): Docs SI-8880, #08-V8-003, #09-06-01-007B
GM Electronic Parts Catalog (EPC): Doc. ENG-8012
U.S. Environmental Protection Agency (EPA) Certificate Database (A-08-001)
SAE International: J1349 Engine Power Certification Standards
The GM LS3 was used across GM's Y and Zeta platforms with longitudinal mounting and no external licensing. This engine received platform-specific adaptations-unique engine mounts and accessory drive layouts for the Corvette versus the Camaro-creating minor service part differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code 'LS3' cast into the rear of the engine block, near the bellhousing (GM TIS Doc. ENG-ID-007). The 8th digit of the VIN is '8' for Corvette and Camaro applications. Visually, it can be identified by its aluminum block, rectangular-port cylinder heads, and the 'LS3' badge on the engine cover. Critical differentiation from the LS2: The LS3 has a larger 6.2L displacement (vs. 6.0L) and larger, rectangular intake ports. Service parts like cylinder heads and intake manifolds are not interchangeable with the LS2 without significant modification (GM SIB #09-06-01-007B).
The LS3's primary documented service focus is potential valve spring fatigue in high-RPM applications, with elevated incidence in track-driven vehicles. GM internal data from 2010 indicated a subset of engines required spring updates for competition use, while NHTSA data shows no significant safety recalls. High-RPM driving cycles make adherence to the revised service procedure critical.
Analysis derived from GM technical bulletins (2008-2017) and NHTSA recall data (2008-2017). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about GM LS3.
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