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Knock sensor help needed!

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Old Sep 8, 2016 | 08:16 AM
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Default Knock sensor help needed!
Can somebody please tell me the correct part number for the knock sensor that goes in a 2001 Pontiac Trans Am LS1?
I am getting two different part numbers between AutoZone Amazon and Summit Racing. Is it 12589867 or 213-3521?
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Old Sep 8, 2016 | 09:33 AM
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Those are the same part. The 213-3521 is the ACD number and the 12589867 is the GM number.
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Old Sep 8, 2016 | 11:43 AM
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Thanks. Now debating on whether to use FelPro or GM gaskets.
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Old Sep 8, 2016 | 11:53 AM
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For the intake? I used felpros and they work just the same I'd imagine.
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Old Sep 8, 2016 | 12:25 PM
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felpro gm or mahle should all work just fine
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Old Sep 8, 2016 | 12:31 PM
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Fel-Pro works perfect for the intake manifold.
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Old Sep 8, 2016 | 05:23 PM
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Thanks all. I ordered all the parts and a buddy with an LS3 said he'd help out if I needed help. I think it will work out well and at most I'll just need to buy a torque wrench. Doing all GM parts with FelPro intake gaskets. Hopefully this solves my PO332!
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Old Sep 8, 2016 | 06:43 PM
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replace the harness while you are in there, its only 40 bucks and prob could stand to use it
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Old Sep 8, 2016 | 08:07 PM
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I ordered that too.
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Old Sep 9, 2016 | 08:59 PM
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While you're in there, you are doing this much needed mod, right?? http://ls1howto.com/index.php?article=18
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Old Sep 10, 2016 | 08:25 AM
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No I wasn't going to. Can you just get a modded LS or new LS 6 valley cover without messing with the engine?
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Old Sep 10, 2016 | 11:33 AM
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No, the LS1 block will need this modification.

HOWEVER, your car may have come with the LS6 block which won't need the mod.

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Old Sep 10, 2016 | 11:40 AM
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My PCV leads out of the rear of the drivers side valve cover so I think it's an LS1.
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Old Sep 10, 2016 | 12:05 PM
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Originally Posted by Ruffturbo911
My PCV leads out of the rear of the drivers side valve cover so I think it's an LS1.
This is correct for an F-body, even if it was one of the vehicles that received the LS6 block. The LS1 AND LS6 blocks used in Camaro/Firebird production will always use the Camaro/Firebird LS1 style PCV system.

Regardless, the LS6 PCV mod is a smart upgrade and worth the effort and small cost. If you have a LS1 block, cut out the nub in the block, it's easy. If you have a LS6 block, no cutting needed.

Last edited by Paul Bell; Sep 10, 2016 at 12:10 PM.
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Old Sep 10, 2016 | 12:14 PM
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Ok I got you. I thought the 6 block had the vented valley cover. I couldn't see anything with a mirror looking for the 6 block number.
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Old Sep 10, 2016 | 12:22 PM
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I'm not sure if you've started this project yet but once you pull the valley cover, you'll know. With the estimate of 10~15% of F-bodies getting the LS6 block in 2001, it's unlikely that you have one but there's a chance.

If it were me doing the job, assume it'll need cutting and hope it won't, just to eliminate the one step in the work.
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Old Sep 10, 2016 | 12:35 PM
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That's a good idea. I'll look for the cutting wheels and ready the shop vac! Too bad the engine is still in the car, otherwise I'd be tempted to do a cam and heads. Not sure if it would pass emission then
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Old Aug 29, 2022 | 04:53 AM
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Everything works great and valley mod worked out well too. Thanks

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