wheel nut thread

[PGLM]

Does anyone knows what size is g-bodys wheel nut thread?

 

[RobertB.]

7/16

 

[SonOfRDgear]

7/16 for 78-82 i think, after that its 12mm x 1.5

 

[maliburacinfreak]

7/16 for 78-82 i think, after that its 12mm x 1.5

close. changed to 12mm in 82

 

[PGLM]

Thanks 😀

 

[565bbchevy]

I've had 82" gbodies with both sizes so I am guessing the changeover started sometime in 82 probably half way through the model year(they probably had to use up the standard stock) and depending when and where your car was made you got standard or metric. Everything 83 and up I've encountered has always had the 12 mm.