LS2 Engine
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Auto EngineGen V EcoTec3 (RPO L83)
Engine Family: Gen V EcoTec3 (RPO L83) Displacement: 5.3 L (5328 cc / 325 cu in) Configuration: 90° V8, naturally aspirated Block Material: Aluminum Cylinder Heads: Aluminum Valvetrain: OHV, 2 valves per cylinder Fuel System: Direct Injection (DI) Variable Valve Timing: Yes Active Fuel Management (AFM): Yes Compression Ratio: ~11.0:1 Performance Horsepower: ~355 hp @ 5600 rpm Torque: ~383 lb-ft @ 4100 rpm Redline: ~5800 rpm Firing Order: 1-8-7-2-6-5-4-3 Fuel Requirement: Regular unleaded (some versions E85 capable) 6L80 – 6-Speed Automatic Most common transmission behind the L83 Strong towing capability Used in many trucks and SUVs
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Auto EngineGM LM7 5.3L V8 Engine Specs
GM LM7 5.3L V8 Engine Specs Engine Code: LM7 Engine Family: Gen III LS / Vortec 5300 Configuration: 90° V8, pushrod (OHV) Valvetrain: 2 valves per cylinder (16-valve) Displacement: 5.3 liters (325 cubic inches / 5327 cc) Block Material: Cast iron Cylinder Heads: Aluminum Fuel System: Sequential multi-port fuel injection Ignition: Coil-near-plug Firing Order: 1-8-7-2-6-5-4-3 Internal Dimensions Bore: 3.78 in (96 mm) Stroke: 3.62 in (92 mm) Compression Ratio: 9.5:1 (typical stock) Performance (factory ratings vary by year) Horsepower: 270–295 hp @ ~5,200 rpm Torque: 315–335 lb-ft @ ~4,000 rpm Other Redline: ~5,800–6,000 rpm Oil Capacity: 6 quarts with filter Fuel Type: 87 octane (regular unleaded) Common Factory Applications 1999–2007 Silverado / Sierra 1500 (2WD & 4WD) Tahoe, Suburban, Yukon Express / Savana vans 🔄 GM 4L60 / 4L60E Automatic Transmission (2WD) General Transmission Type: 4-speed automatic Drive Type: Rear-wheel drive (2WD) Control: Electronic (4L60E) Case Material: Aluminum Bellhousing Pattern: LS / Gen III V8 (7-bolt) Gear Ratios Gear Ratio 1st 3.06 : 1 2nd 1.62 : 1 3rd 1.00 : 1 4th (Overdrive) 0.70 : 1 Reverse 2.29 : 1 Capacity & Strength Torque Rating: ~350 lb-ft (stock) Fluid Capacity: 8.5–11.5 quarts (depending on converter & pan) Torque Converter: Lock-up style Input Shaft: 30-spline (most LM7 applications) Weight Approximate Dry Weight: 145–155 lbs ⚙️ LM7 + 4L60E Combo Summary Reliable stock combo for daily driving and light performance Handles mild bolt-ons well (cam, intake, headers) Common upgrade path includes built 4L60E or swap to 4L80E for higher power setups
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Auto EngineSupercharge Gen 4 coyote engine
Supercharge Gen 4 coyote engine and transmission
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