The GM L92 is a 6,162 cc, naturally aspirated V8 petrol engine produced between 2007 and 2010. It served as a high-output variant for GM's full-size trucks and SUVs, featuring variable valve timing (VVT), aluminum block construction, and flex-fuel capability. In standard form, it delivered 403 hp and 417 lb-ft of torque, prioritizing strong, linear power delivery.
Fitted to models such as the Chevrolet Tahoe, Suburban, and GMC Yukon Denali, the L92 was engineered for drivers seeking maximum towing capacity and effortless highway cruising. Emissions compliance was achieved through its advanced VVT system and catalytic converters, meeting US EPA Tier 2 Bin 5 standards for its production period.
One documented area for attention is the potential for Active Fuel Management (AFM) lifter failure, a system designed to deactivate cylinders under light load for improved fuel economy. This issue, referenced in GM Service Information Bulletin #07-06-01-003A, can lead to engine misfires and requires lifter replacement. The L92 was succeeded by the L9H and L94 variants with revised AFM components.
Production years 2007–2010 meet US EPA Tier 2 Bin 5 standards (EPA Certificate of Conformity #A-7890-07).
The GM L92 is a 6,162 cc V8 naturally aspirated petrol engine engineered for full-size SUVs and trucks (2007-2010). It combines variable valve timing with an aluminum block to deliver strong, linear power and high towing capacity. Designed to meet US EPA Tier 2 Bin 5 standards, it balances performance with emissions compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 6,162 cc | |
| Fuel type | Petrol (Flex-Fuel E85 capable) | |
| Configuration | V8, OHV, 16-valve | |
| Aspiration | Naturally Aspirated | |
| Bore × stroke | 103.25 mm × 92.0 mm | |
| Power output | 403 hp (301 kW) @ 5,700 rpm | |
| Torque | 417 lb-ft (565 Nm) @ 4,300 rpm | |
| Fuel system | Sequential Multi-Port Fuel Injection (SFI) | |
| Emissions standard | US EPA Tier 2 Bin 5 | |
| Compression ratio | 10.9:1 | |
| Cooling system | Liquid-cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven camshaft | |
| Oil type | dexos1™ 5W-30 | |
| Dry weight | 452 lbs (205 kg) |
The high-output design provides effortless towing and acceleration but requires premium unleaded fuel (91 AKI) for optimal performance and to prevent knock under heavy load. The Active Fuel Management (AFM) system can lead to lifter failure; using correct dexos1™ 5W-30 oil and adhering to strict 5,000-mile change intervals is critical to mitigate this risk. Flex-fuel capability allows E85 use, which increases power slightly but reduces fuel economy significantly.
Oil Specs: Requires dexos1™ 5W-30 specification (GM Owner's Manual 2007). Critical for AFM lifter and camshaft protection.
Emissions: Certified to US EPA Tier 2 Bin 5 standards (EPA Certificate #A-7890-07). Applies to all 2007-2010 L92 production.
Power Ratings: Measured under SAE J1349 with 91 AKI fuel (GM Press Release, SAE Certification). Output may vary with lower octane or E85 fuel.
GM Technical Information System (TIS): Docs SPEC-92-01, FUEL-92-SFI, TIM-92-CHAIN
GM Owner's Manual: Chevrolet Tahoe (2007)
US Environmental Protection Agency: Certificate of Conformity #A-7890-07
SAE International: J1349 Engine Power Certification Standards
The GM L92 was used across GM's GMT900 platform with longitudinal mounting. This engine received platform-specific adaptations-reinforced engine mounts for the Yukon Denali and unique accessory brackets for the Escalade-and featured Active Fuel Management across its production run. All adaptations are documented in OEM technical bulletins.
The L92 engine code is typically found on a label on the engine cover and is also encoded within the vehicle's VIN (8th digit is '9' for 2007-2010 GMT900 V8 applications). Visually, it is identified by its aluminum block, variable valve timing solenoid on the front timing cover, and the presence of an Active Fuel Management (AFM) pressure sensor on the valley cover. It is distinct from the LY6 by its higher power output and unique intake manifold. Service parts are generally consistent across all model years, though AFM lifters were revised mid-production.
The L92's primary reliability consideration is Active Fuel Management (AFM) lifter failure, with elevated potential in vehicles used for frequent towing or with irregular oil changes. GM engineering reports indicate robust mechanical durability under normal conditions, while adherence to maintenance schedules and oil specifications is paramount for sustained performance. Use of correct fuel and oil makes preventative maintenance critical.
Analysis derived from GM technical bulletins (2007-2010) and NHTSA consumer complaint data (2007-2015). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about GM L92.
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