LM7 Engine Specs 2024 ❤️


LM7 Engine Specs

The LM7 is a 5.3L Gen. 3 small block engine that was used in GM trucks from 1999 to 2007. It was also referred to in the Vortec 5300 for marketing purposes. 

Here are the most important specifications of the LM7 engine:

Engine TypeV8
Displacement5.3L (325.1 cu in)
Bore & Stroke96 mm x 92 mm (3.78 in x 3.62 in)
Block MaterialCast Iron
Head MaterialAluminum
Horsepowerbetween 270 and 295 HP (depending on the model year)
Torque315-335lbs (depending on the model year)
Compression Ratio9.2:1 to 9.5:1
ValvetrainPushrod OHV 2 valves per cylinder
Intake Valve Diameter1.890 in
Exhaust Valve Diameter1.550 in
Fuel SystemSequential port injection
Capacity of Oil (with filter)6 quarts (5.7 liters)
Oil TypeTypically, 5W-30 synthesized or semi-synthetic (consult the owner’s manual to find specific suggestions)
Oil Filter TypeSpin-on (ACDelco PF45 or similar)
Oil Change Cost (approximate)$50-$80 for standard oil change $100-$150 for synthetic oils modification (labor only)


The LM7 engine is a robust solid 5.3-liter V8 engine that has been in use in A variety of GM trucks since 1999.


It’s renowned for its longevity And performance, which makes it A favorite option for drivers of all kinds.


With an engine horsepower rating of 270-295 hp, And an output torque that is 315-335 ft.-lbs. The LM7 engine is powerful enough for everyday use And towing.

I hope that this guide has given you valuable information on the LM7’s engine specifications. Thank you for your time I hope that you find this article informative.

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