Question about 1992 GMC Sierra C3500

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Flare nut wrench size?

Trying to replace a metal brake line to the rear brakes and I don't know what size flare nut wrench to use.
I have SAE 9/16, 1/2, 7/16 and 3/8 wrenches. None of these fit my 1994 Pontiac Grand AM brake lines.

Thanks

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  • GMC Master
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Try metric size. a flare wrench is an closed end wrench with a little **** in big enough to to slide over the line and then around the bolt its grabs mor of the bolt than a regular wrench

Posted on Dec 13, 2008

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