The GM LMG is a 5,328 cc, naturally aspirated V8 petrol engine produced between 2007 and 2014. It features overhead valve (OHV) architecture with two valves per cylinder and Active Fuel Management (AFM) for improved efficiency. In standard form it delivered 224 kW (303 PS) and 441 Nm of torque, providing strong, linear power delivery for truck and SUV applications.
Fitted to models such as the Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade, the LMG was eng…
Production years 2007–2014 meet U.S. Tier 2 Bin 5 and Euro 4 standards (EPA Certificate of Conformity #A-07-002).
The GM LMG is a 5,328 cc V8 naturally aspirated petrol engine engineered for full-size trucks and SUVs (2007-2014). It combines OHV architecture with Active Fuel Management to deliver strong, low-RPM torque and confident towing performance while improving fuel economy. Designed to meet U.S. Tier 2 Bin 5 and Euro 4 standards, it balances power with emissions control.
| Parameter | Value | Source |
|---|---|---|
Displacement | 5,328 cc | |
Fuel type | Petrol | |
Configuration | V8, OHV, 16-valve | |
Aspiration | Naturally Aspirated | |
Bore × stroke | 96.0 mm × 92.0 mm | |
Power output | 224 kW (303 PS) @ 5,200 rpm | |
Torque | 441 Nm @ 4,000 rpm | |
Fuel system | Sequential Multi-Port Fuel Injection (SFI) | |
Emissions standard | U.S. Tier 2 Bin 5 / Euro 4 | |
Compression ratio | 9.9:1 | |
Cooling system | Water-cooled | |
Turbocharger | None | |
Timing system | Chain-driven | |
Oil type | dexos1™ (SAE 5W-30) | |
Dry weight | 209 kg |
The GM LMG was used across GM's GMT900 platform trucks and SUVs with longitudinal mounting and no external licensing. This engine received platform-specific adaptations-unique engine mounts and accessory drive layouts for the Silverado versus the Escalade-creating minor service part differences. All adaptations are documented in OEM technical bulletins.
The LMG's primary documented service focus is potential lifter failure associated with the Active Fuel Management system, with elevated incidence in high-mileage vehicles. GM internal data from 2010 indicated a subset of engines required lifter updates, while NHTSA data shows no significant safety recalls. High-mileage driving cycles make adherence to the revised service procedure critical.
Analysis derived from GM technical bulletins (2007-2014) and NHTSA recall data (2007-2014). 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 GM LMG is generally robust, with its simple OHV design and lack of forced induction reducing complexity. The primary concern is AFM lifter failure, which is addressed by a factory service bulletin. With regular maintenance using dexos1™ oil and attention to the AFM system, it should provide dependable long-term service, especially if the revised lifters are installed.
The most common documented issues are AFM lifter failure, intake manifold gasket leaks, exhaust manifold bolt breakage, and knock sensor failure. These are addressed in GM service bulletins and are generally manageable with proper maintenance.
The LMG engine was found in the Chevrolet Silverado 1500, GMC Sierra 1500, Cadillac Escalade, Chevrolet Suburban 1500, and GMC Yukon from the 2007 to 2014 model years. It was not used in any other GM vehicles or beyond the 2014 model year.
Yes, the LMG responds well to tuning. An ECU remap can yield gains of 15-25 kW by optimizing ignition and fuel maps. Bolt-on modifications like a performance exhaust and cold air intake can add further gains. Significant power increases require internal modifications or disabling the AFM system.
Fuel economy is typical for a 5.3L V8 of its era. In a Chevrolet Silverado 1500 2WD, expect around 15.7 L/100km (city) and 11.2 L/100km (highway), or approximately 17 mpg (US) combined. Real-world figures vary significantly based on driving style, vehicle weight, and whether AFM is functioning correctly.
No. The GM LMG is a non-interference engine. If the timing chain were to fail, the pistons would not contact the open valves, preventing catastrophic internal damage. The engine would simply stop running, requiring a timing chain replacement.
GM mandates the use of dexos1™ full synthetic oil, typically in 5W-30 viscosity. Using the correct specification is critical for the health of the Active Fuel Management system and to minimize lifter wear. This is non-negotiable for warranty compliance and engine longevity.
Comprehensive technical documentation and regulatory references
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GM Official Site
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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
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