Engine similarities?

2009 CHEVROLET SILVERADO
180,547 MILES • 5.3L • V8 • 2WD • AUTOMATIC
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JOSELCANTU
I’ve watched your amazing 5.3 ls Lm7 breakdown playlist, and my question is since my engine is the LC9 that comes from the gmt900. Can I use all those exact parts you received from summit racing or is there some small adjustments or tips I need to look out for to do a build just like yours.
Jan 28, 2026 at 10:35 PM
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STEVE W.
  • ✓ASE Certified Mechanic
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They are somewhat similar but they are different generations. The 5.3 in the videos is the later 3rd generation engine while yours is a 4th generation engines. There were a number of changes made in the gen 4 engines like displacement on demand and internal changes in the cam and lifters as a result. There are parts available for them to build some extra power though they are not the same as the LM parts.
Jan 29, 2026 at 9:46 PM
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RYAN L
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  • 269 POSTS
  • ASE Certified Mechanic
Thank you for watching the series!

There is a ton of crossover on parts but before you order anything just check with Summit if it fits your engine. They have a really good fit checker on every single parts page.

Best,
Ryan
Jan 30, 2026 at 2:51 PM
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