LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

LT1 oil pan drain bolt size?

Old 01-17-2019, 04:46 PM
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LT1 oil pan drain bolt size?

I'm going to do an oil change and just curious as to what size wrench to use to take the drain bolt off. 97 lt1.
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Old 01-17-2019, 06:39 PM
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Re: LT1 oil pan drain bolt size?

Hi Isabel.rose,

I am pretty sure it is a 17 mm on the 1997. That is what I have on my 1996 but my earlier 1995 drain bolt is a much larger 13/16".
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