The GM LMP is a 5,328 cc, 90‑degree V8 petrol engine produced between 2007 and 2011. It features a cast iron block, aluminum heads, and overhead valve (OHV) pushrod architecture with variable valve timing (VVT) on the exhaust cam. This Vortec engine delivered 315 hp and 335 lb‑ft of torque, emphasizing low — end grunt and towing capability for full — size truck applications.
Fitted to models such as the Chevrolet Silverado 1500 and GMC Sierra 1500, the LMP was engineered for ru…
All production years (2007–2011) meet U.S. Tier 2 Bin 5 standards (EPA Engine Family Code: 3GAXV05.3LBAK).
The GM LMP is a 5,328 cc 90-degree V8 petrol engine engineered for full-size trucks (2007-2011). It combines OHV architecture with exhaust-only VVT to deliver strong low-RPM torque and rugged durability. Designed to meet U.S. Tier 2 Bin 5 standards, it prioritizes towing capacity and daily reliability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 5,328 cc | |
Fuel type | Petrol (Gasoline) | |
Configuration | 90° V8, OHV, 2 valves per cylinder | |
Aspiration | Naturally aspirated | |
Bore × stroke | 99.0 mm × 86.0 mm | |
Power output | 315 hp (235 kW) | |
Torque | 335 lb-ft (454 Nm) | |
Fuel system | Sequential multi-port fuel injection (SFI) | |
Emissions standard | U.S. Tier 2 Bin 5 | |
Compression ratio | 9.9:1 | |
Cooling system | Water-cooled | |
Turbocharger | None | |
Timing system | Chain-driven camshaft with VVT actuator | |
Oil type | SAE 5W-30 API SM/SN | |
Dry weight | 458 lb (208 kg) |
The GM LMP was used across GM's GMT900 platform with longitudinal mounting and no external licensing. This engine featured unique accessory brackets and engine mounts for the Silverado versus the Sierra. From 2009, the VVT actuator was revised for improved durability, creating a key service part difference. All adaptations are documented in OEM technical bulletins.
The LMP's primary reliability risk is exhaust cam VVT actuator failure, with elevated incidence in high-mileage or poorly maintained vehicles. GM internal data indicated a significant number of warranty claims for actuator replacement, while owner reports consistently cite reduced power and check engine lights as common symptoms. Extended oil change intervals and use of incorrect oil viscosity make the updated actuator and strict maintenance critical.
Analysis derived from GM technical bulletins (2007-2011) and NHTSA complaint data (2007-2015). 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 LMP is generally a robust and durable engine with a simple OHV design. Its main weakness is the original exhaust cam VVT actuator, which is prone to failure. With the updated actuator installed and proper maintenance (especially oil changes), the LMP can reliably exceed 200,000 miles.
The most frequent issue is the failing exhaust cam VVT actuator, causing reduced power and check engine lights. Other common problems include oil leaks from the valve covers, intake manifold gasket leaks, and spark plug/coil failures. These are well-documented in GM service bulletins.
The LMP 5.3L V8 was used in the Chevrolet Silverado 1500 and GMC Sierra 1500 from 2007 to 2011. It was a key engine for GM's full-size truck lineup during that era, offering VVT for improved efficiency over the base LY5 engine.
The LMP has good tuning potential. Basic bolt-ons like a cold air intake and cat-back exhaust can yield 15-25 hp. More significant gains require ECU tuning, which can unlock 30-50+ hp by optimizing ignition and fuel maps. The robust OHV design can handle moderate power increases reliably.
Fuel economy is typical for a 5.3L V8 in a full-size truck. In a 2WD Chevrolet Silverado 1500, expect around 15 mpg city and 21 mpg highway. Real-world combined fuel economy usually falls between 17-18 mpg, heavily influenced by driving conditions and vehicle load.
No. The GM LMP is a non-interference engine. This means if the timing chain were to fail or jump, the pistons will not contact the valves. While a broken chain will still leave you stranded, it prevents catastrophic internal engine damage, making it a more forgiving design.
GM recommends SAE 5W-30 motor oil for the LMP engine. The oil should meet the API SM or SN specification (or a newer equivalent). Regular oil changes every 5,000 miles are crucial for long-term engine health, particularly for the VVT system and timing chain.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with GM or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
GM Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
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.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialGM documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed”.
All external links open in new tabs. Please verify current availability of resources.