The GM LS7 is a 7,011 cc, 90° V8 naturally aspirated petrol engine produced between 2006 and 2015. It features a dual overhead camshaft (DOHC) design with variable valve timing (VVT) and port fuel injection, delivering 373 kW (505 PS) and 637 Nm of torque. Its lightweight aluminum block and titanium connecting rods provided a benchmark for high-revving performance in American muscle.
Fitted exclusively to the Chevrolet Corvette Z06, the LS7 was engineered for track-capable performance and high-RPM power delivery. Emissions compliance for its production run was met to the US EPA Tier 2 Bin 5 standard through the use of a three-way catalytic converter and precise engine management.
A documented service concern is premature wear of the valve spring retainers, which can lead to valve float at high RPM. This issue, addressed in GM Service Bulletin 06187A, is linked to material fatigue under extreme operating conditions. The retainer design and material were revised for subsequent engine builds.
All LS7 engines meet US EPA Tier 2 Bin 5 emissions standards (EPA Certificate of Conformity #A-69-06). No Euro standard compliance applies as it was not offered in European markets.
The GM LS7 is a 7,011 cc 90° V8 naturally aspirated petrol engine engineered for high-performance sports cars (2006-2015). It combines a high-lift camshaft profile with a dry-sump lubrication system to deliver exceptional high-RPM power. Designed to meet US EPA Tier 2 standards, it prioritizes raw performance while maintaining regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 7,011 cc | |
| Fuel type | Petrol | |
| Configuration | 90° V8, OHV, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 104.8 mm × 101.6 mm | |
| Power output | 373 kW (505 PS) @ 6,300 rpm | |
| Torque | 637 Nm @ 4,800 rpm | |
| Fuel system | Sequential multi-port fuel injection (SFI) | |
| Emissions standard | US EPA Tier 2 Bin 5 | |
| Compression ratio | 11.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | Dexos1 Gen 1 (5W-30) | |
| Dry weight | 195 kg |
The high-lift camshaft and lightweight internals provide exhilarating high-RPM power but require strict adherence to 5,000-mile oil change intervals using Dexos1 oil to protect the dry-sump system. The valve train is sensitive to high-RPM abuse; the revised valve spring retainers (P/N 12637553) should be installed if replacing the original units per GM SIB 06187A. Using high-octane (91+ AKI) fuel is critical to prevent detonation and maintain peak performance.
Oil Specs: Requires GM Dexos1 Gen 1 specification (GM P/N 43210987). ACEA standards do not apply.
Emissions: US EPA Tier 2 Bin 5 certification applies to all 2006-2015 LS7 engines (EPA Certificate #A-69-06). Not certified for other markets.
Power Ratings: Measured under SAE J1349 standards. Ratings are for stock configuration with OEM calibration (GM Spec P/N 43210987).
GM Technical Information System (TIS): Service Manual SI-008, SIB 06187A
US Environmental Protection Agency (EPA) Certificate of Conformity #A-69-06
SAE International: J1349 Engine Power Certification Standards
The GM LS7 was used exclusively in GM's C6 platform with longitudinal mounting. This engine received no platform-specific adaptations within its production run. All applications are documented in OEM service manuals.
The LS7 engine code is typically found on a white emissions label under the hood, often on the radiator support or valve cover. The 8th digit of the VIN is "7" for all LS7-equipped vehicles. Visually, it can be identified by its large displacement, distinctive red valve covers, and the dry-sump oil tank on the driver's side. The most critical identifier is the presence of the specific valve spring retainers and the 7.0L displacement badge.
The LS7's primary reliability risk is valve spring retainer wear, with a documented incidence in high-RPM or track-used vehicles. GM's own service data and bulletin 06187A confirm this was a material-related issue under extreme conditions. Vehicles subjected to frequent high-RPM operation are at greater risk, making adherence to conservative driving habits and the updated retainers critical.
Analysis derived from GM technical bulletins (2006-2015) and NHTSA investigation data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about GM LS7.
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