Tonyrodz
Resident Resident
I took a pic of an oil sender on an LS motor yesterday, I didn't realize it was an aluminum block. Pretty cool. This came out of an Envoy, and it's the 5.3.
Aluminum LS Block
- Thread starter Tonyrodz
- Start date
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iamdub
Full Access Member
Yup - that's the "famed" L33.
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Tonyrodz
Resident Resident
Is it rare?
iamdub
Full Access Member
Kinda. The V-8 Envoys, Trailblazers and Raniers weren't as common as the I-6 ones. I think it was in some Silverados and Sierras, too.
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Tonyrodz
Resident Resident
Nice. Motor had an issue so it was yanked. An iron block is going into its place. Motor is fixable but they didn't want to bother. I think my buddy might eventually scrap it.
iamdub
Full Access Member
If the block is fine, they bring a few dollars.
swathdiver
Full Access Member
That'a an LM4, the LM7s cousin. The L33 has a different block number and was only used in full size, extended cab pickups. The LM4 was used in the 2003 and 2004 Envoy XLs.
iamdub
Full Access Member
Forgot about the LMs- nobody ever mentions them. You would be the one to know! lol
What're the differences?
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Tonyrodz
Resident Resident
Btw, it did come from an Envoy XL.
swathdiver
Full Access Member
The L33 was marketed as an **, or Vortec High Output; something like that. The engine had a "bigger" camshaft which, coincidentally, is the same grind in our engines. That was the most powerful 5.3 Gen III engine. Not that the LM4 is no good, it's power rating is 5-10 hp less depending on the application.
