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 | Refer to vehicle handbook / manufacturer specification | |
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.
Engine Finders UK Ltd, which operates EngineCode.uk, can pass your enquiry to engine suppliers in the UK. The service is for vehicles in the United Kingdom, with UK delivery or fitting. This is a commercially connected service, and sending an enquiry does not confirm diagnosis or compatibility.
Diagnostic reminder: If a technician has recommended replacing the engine, you can send an enquiry to engine suppliers in the UK. Confirm the diagnosis first: an engine-code record does not diagnose a fault.
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
EngineCode.uk is operated by Engine Finders UK Ltd. It provides engine-reference information and an optional commercial enquiry service. It is not an official manufacturer website. Check the record's sources and confirm vehicle-specific details before relying on it for parts, repairs or replacement.
Our editorial standard prioritises relevant manufacturer documentation and official regulatory sources. The sources and verification status for a record should be checked alongside the data.
A statement is not verified merely because a source is listed. Where supporting evidence is missing or conflicting, the record should identify that limitation. Please report unsupported or inconsistent information.
Transparency in gaps
A missing or unverified value does not mean the manufacturer has withheld it. We distinguish information not yet verified, information not available to us, and information explicitly not disclosed by the source.
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.
Records are subject to review and correction. Source links, dates and verification notes should be read with the technical information. Our Editorial and Sourcing Policy explains our standards and review process.
Found an error or missing source? Report a problem with this page. Include the field or statement concerned and a supporting source if available. You can also email corrections@enginecode.uk.
Copyright and permissions
Images and other material may be protected by copyright. Attribution does not by itself grant permission to reuse material. If you believe material on this site infringes your rights, contact copyrights@enginecode.uk with the page URL and details of your claim. We will review the material and take appropriate action.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
Our Privacy Policy explains how Engine Finders UK Ltd uses information from visits, vehicle lookups, enquiries and messages. Our Cookie Policy explains cookies and similar technologies and how to change your choices.
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
Ownership and commercial services
EngineCode.uk is owned and operated by Engine Finders UK Ltd. Alongside our reference content, we offer an optional replacement-engine enquiry service through Engine Finders and may identify relevant services provided by businesses connected with us. These commercial connections are disclosed. Using an enquiry service is not required to read our reference content.
Engine Finders UK Ltd operates this website. Our optional enquiry service has a commercial purpose. Our Ownership and Commercial Disclosure explains the relationship between the reference website and that service. Participating suppliers pay a fee or subscription to participate on the network and receive quote requests.
Use this record as a starting point for identification. Specifications and vehicle applications may contain errors or omissions. Confirm the exact engine variant and compatibility using vehicle-specific documentation and a qualified supplier or technician.
All external links open in new tabs. Please verify current availability of resources.