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Old 11-28-2014, 10:04 AM   #1
SSC378
 
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LS3? L99?

I have a 2010 SS with auto trans. How can I tell which motor I have in my car? The LS3 or L99? I was going to call the dealer with my vin and ask but was wondering if there was any other way.
Thanks
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Old 11-28-2014, 10:15 AM   #2
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Auto trans = L99 400 hp
Manual trans = LS3 425 HP

Have fun
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Old 11-28-2014, 10:19 AM   #3
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I think the LS3 is 426... But 1 HP is like tomato / tomatoe...
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Old 11-28-2014, 10:21 AM   #4
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Quote:
Originally Posted by sonnydurden View Post
I think the LS3 is 426... But 1 HP is like tomato / tomatoe...
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Old 11-28-2014, 10:24 AM   #5
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You have the L99. L99 is the LS3 with AFM I believe.
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Old 11-28-2014, 10:38 AM   #6
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I have the L99 =400hp
My so has LS3=426hp
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Old 11-28-2014, 10:39 AM   #7
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The L99 has a different cam, lower compression, different valves and relief cuts in the pistons vs LS3
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Old 11-28-2014, 11:03 AM   #8
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I believe all auto trans are L99 and all manuals are LS3s.
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Old 11-28-2014, 12:11 PM   #9
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Cool. Thanks for the info.
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Old 11-28-2014, 12:13 PM   #10
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Quote:
Originally Posted by Mint View Post
You have the L99. L99 is the LS3 with AFM I believe.
Yes, the AFM blows until you take a road trip!!!.. But I used the paddle shifter.. They seem to off set the AFM..
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Old 11-28-2014, 12:17 PM   #11
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Also,
the LS3, Manual has a "W" code in the VIN

The L99, Auto, has a "J" code in the VIN
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Old 11-28-2014, 01:07 PM   #12
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Quote:
Originally Posted by sonnydurden View Post
I think the LS3 is 426... But 1 HP is like tomato / tomatoe...
One HP counts...we spend stupid money in Mods for every HP we can gain! LOL
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Old 11-28-2014, 01:09 PM   #13
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True, but that's at the crank, at the wheels its really more like 0.8 HP
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Old 11-28-2014, 03:41 PM   #14
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Quote:
Originally Posted by Mint View Post
You have the L99. L99 is the LS3 with AFM I believe.
Not exactly. There are considerable differences. (L99 is quicker - )
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