New to GM and have questions

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992dr

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You’re probably right. I wasn’t sure if they changed. My 07 Denali has a 6.2 but it’s not an LS

All GM Gen III and IV engines are LS based.
LS specific models (LS1,2,3,4,6,7,9, LSA) were all aluminum as well as some other truck/suv models.
All LS and LS based motors come with aluminum heads.
 
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