GM LM7 Engine

GM LM7 Engine for Sale at Reliable Used Part

Need a GM LM7 Engine for a repair, replacement, or rebuild? Reliable Used Part lists options for Silverado, Sierra, Tahoe, Yukon and Suburban models for model years 1999–2007, giving you a practical way to source a used engine without paying new-part prices. Explore our full used engine inventory or ask our team to confirm the details for your vehicle.

This engine is listed at Reliable Used Part with options from $1,150–$3,000. Your final price depends on the unit and option you choose, so ask our team to confirm availability, condition, included components, and shipping details before you order. Our team can walk you through the GM LM7 Engine options so you can order with confidence.

What Is the GM LM7 Engine?

The GM LM7 Engine is GM’s 5.3-liter Vortec 5300 V8 used in the Silverado, Sierra, Tahoe and Yukon.

Before you buy, make sure it matches your vehicle’s exact configuration, not just its model name. If you want a refresher on how this component works, read the Wikipedia overview of the internal combustion engine.

GM LM7 Engine Compatibility and Fitment

The GM LM7 Engine listing is intended for Silverado, Sierra, Tahoe, Yukon and Suburban models for model years 1999–2007. Exact compatibility depends on the model year, trim, engine, and drivetrain, so verify fitment before ordering. Ordering a GM LM7 Engine online should be simple, which is why our team can answer fitment questions before you buy.

• Models: Silverado, Sierra, Tahoe, Yukon and Suburban
• Model years: 1999–2007
• Engine and transmission options: 5.3L V8 LM7

How to Confirm Fitment Before You Buy

A few minutes of checking can save you a return. Before you order, confirm the following:

• Match the engine code, or the eighth character of your VIN, with the engine options listed for your vehicle.
• Confirm the model year, trim, displacement, and fuel type (gasoline, diesel, or hybrid).
• Note features that affect compatibility, such as turbocharging, direct injection, or variable valve timing.
• Check whether you also need related components such as the intake, wiring harness, sensors, or ECU.
• Ask our team to confirm availability, included components, and condition details before you order.

You can decode your VIN with the NHTSA VIN decoder and check for open safety recalls on the NHTSA recalls page before you start a major repair.

Signs You May Need a Replacement Engine

These common symptoms may mean it is time to look at a replacement engine:

• Persistent knocking, ticking, or tapping noises from inside the engine
• Excessive oil consumption, oil leaks, or blue smoke from the exhaust
• Repeated overheating or coolant loss without an external leak
• Rough running, misfires, or low compression on one or more cylinders
• Metal particles in the oil, or a check engine light that returns after repairs

These symptoms can point to serious internal wear, but smaller faults can cause them too, so have a qualified technician diagnose the vehicle before you commit to a replacement.

Why Buy a Used Engine from Reliable Used Part?

Reliable Used Part helps drivers and shops across the United States source used engines at practical prices. Our team can review your VIN, confirm GM LM7 Engine fitment, and explain warranty terms before you order. Nationwide USA shipping is available, so contact Reliable Used Part for a quote and delivery estimate. Whether you are completing a repair or a full rebuild, the GM LM7 Engine is one of the most important parts to match correctly.

Working on more than one component? You may also want to look at our GM NV4500 Transmission, 6.2 LS Engine and 6.0 LS Engine, or browse the full used engine inventory. Ask us about current GM LM7 Engine stock if you do not see the exact option you need. You can also see all General Motors engine listings.

GM LM7 Engine FAQs