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Author Topic: lug nut size  (Read 7174 times)

Offline got2haul

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lug nut size
« on: January 24, 2008, 07:20:10 am »
1980 C10 1/2 ton stepside 5x5 pattern.  I don't have access to my service manual or owner's manual at the moment.  I did a search and see a response (regarding a question on a 1978 truck's lug nuts and a reply that guesses that the information regarding lug nuts from a 1981 service manual would be the same), but I need to be sure.  Anyone have access to a 1980 manual?
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1980 Custom Deluxe Stepside
        Stepside thread: http://forum.73-87chevytrucks.com/smforum/index.php?topic=7505.0
1980 Silverado Short Bed Fleetside
1976 GMC Sierra Grande C15

Offline VileZambonie

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Re: lug nut size
« Reply #1 on: January 25, 2008, 04:24:00 pm »
I'm pretty sure all the 5 lugs were 1/2-20. The 6 lug were 7/16-20 and the 8 lugs were 9/16-18 IIRC
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Captkaos

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Re: lug nut size
« Reply #2 on: January 25, 2008, 05:32:12 pm »
I swear I posted this, but all 73-87 trucks used the same lugs, Vile posted the right size...
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