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Old Sep 14, 2014 | 01:25 PM
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Default Not sure what this is??

So I picked up a new Griffin 'Direct Fit' radiator for the turbo build on my '99 TA, however as I'm looking it over I notice this opening which I don't seem to have on my '00 WS6:




I guess the questions are, 1- what is that slotted opening for, and 2- how am I plugging that up? This is especially frustrating since I specifically chose an M6 option and I still end up having to plug an opening for a trans cooler
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Old Sep 14, 2014 | 02:26 PM
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I believe that is for a coolant level sensor that would illuminate an idiot light on the dash of some early F-body vehicles. I think it was dropped later. Search around for "ls1 coolant sensor."
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Old Sep 14, 2014 | 04:41 PM
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Most radiators come with a dummy plug for that. It has nothing to do with auto or m6. Trans coolers in the radiator don't even need to be blocked off. They are heat exchangers.
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Old Sep 14, 2014 | 07:31 PM
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Got to AutoZone or similar and have them pull a sensor for 98 or 99-ish LS1 and have them give you a plug to match. Or take you rad into Home Depot and find a plug to fit..be sure to take it by the returns desk for a laugh in the way in the store.

Or if the ~$15 doesn't bother you, buy a cheapie sensor and use that as the plug.

Good luck.
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Old Sep 14, 2014 | 11:18 PM
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All LT1 and LS1 Firebirds and Camaros had a coolant level sensor in the right radiator tank. Your 2000 WS6 has it-or at least the wiring & plug for it.
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Old Sep 14, 2014 | 11:26 PM
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I plugged mine in my BeCool. It's an LT1 relic and was used on 98 LS1s. They just make the radiator for 93-02 and don't bother to include the block off plugs. There are two required. One on the left side as well above the Petcock for the heater core. I just went and got brass NPT plugs and sealed it up with a little teflon tape on there. Doesn't leak and cost like $4 total.
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Old Sep 16, 2014 | 08:47 PM
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Man you guys are making me think I'm crazy but I swear I don't remember having that there on my '00 lol. Thanks though for the feedback!
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Old Sep 16, 2014 | 09:31 PM
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GM eliminated it in 2000.
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