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Old 11-17-2017, 05:43 PM   #1
SimonTek
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Lower Control Arm U-Bolt size

I strugged to find this info, so posting it here.

Control Arm U-Bolt Center to Center 2.13"
Control Arm U-Bolt Length 3.44"
Control Arm U-Bolt Thread Size 9/16"-12 UNC-2A
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Old 11-17-2017, 06:26 PM   #2
Grumpy old man
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Re: Lower Control Arm U-Bolt size

Stock is 1/2" if I remember right ,While you have them apart upgrade to Dorman 13503 which are 9/16 .

https://www.summitracing.com/parts/r...SABEgKJvvD_BwE
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Old 11-17-2017, 07:12 PM   #3
GASoline71
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Re: Lower Control Arm U-Bolt size

I used the 9/16" Dorman U-bolts listed above and didn't even have to drill out the holes in the Crossmember for them to fit. Great upgrade for cheap!

Gary
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Old 11-17-2017, 07:27 PM   #4
68is4me
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Re: Lower Control Arm U-Bolt size

I also used the bigger 9/16 bolts. Also available from gm p/n 345970 (9/16-12x 3 5/32). I am not a big fan of dorman stuff.
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Old 11-17-2017, 11:07 PM   #5
Steeveedee
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Re: Lower Control Arm U-Bolt size

I had the 9/16" bolts stock. I know it was original, because it still had the riveted ball joints at 210k miles. I'll bet that the truck lost 20 pounds of dirt and grease when I rebuilt that front end.
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