The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - What's the smallest hole size you can use to run GM loom through firewall?

Paul Y · 03-07-2023, 07:59 AM

Thanks Mongo,

I am using a Speartech harness and have one of those fancy 'split' seals so now I just need to gather up the courage to drill a big hole on my newly painted firewall....

What could possibly go wrong!

P.

03-07-2023, 07:59 AM	#3
Paul Y Registered User Join Date: Jul 2013 Location: Essex Posts: 936	Re: What's the smallest hole size you can use to run GM loom through firewall? Thanks Mongo, I am using a Speartech harness and have one of those fancy 'split' seals so now I just need to gather up the courage to drill a big hole on my newly painted firewall.... What could possibly go wrong! P. __________________ Woody's Build - http://67-72chevytrucks.com/vboard/s...d.php?t=658621 If it goes wrong, I blame the Internet...