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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Feb 2015 Posts: 285 Shop Shark | | Shop Shark Joined: Feb 2015 Posts: 285 | I will be plumbing the brake lines on my '53 GMC 100. It has a manual master cylinder and drums all around. What size of brake line should be run with this setup? | | | | | Joined: Sep 2013 Posts: 93 Shop Shark | | Shop Shark Joined: Sep 2013 Posts: 93 | Mimic the stock. Drum brakes move more fluid than disc. That is why the rear line is 1/4 inch. Can't go wrong with what the General specified from the factory.
1947 GMC Truck 5 window, Long Bed
2008 Corvette Roadster
2008 Harley Davidson FXDL
2011 F150 Ecoboost 4X4
2015 Subaru Outback AWD
"only the strong survive"
| | | | | Joined: Feb 2015 Posts: 285 Shop Shark | | Shop Shark Joined: Feb 2015 Posts: 285 | The stock lines, for the most part, are not on there. Someone added lines, but I wanted to make certain to run the correct diameter. If I understand your post correct, you are saying the stock lines are 1/4 in., correct? | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | I can't say that GMC is the same, but according to the manual for Chevrolet, the lines are 3/16" except for the line from the MC to the junction block and the cross pipe for the rear axle.
Bill Burmeister
| | | | | Joined: Feb 2015 Posts: 285 Shop Shark | | Shop Shark Joined: Feb 2015 Posts: 285 | ^Thanks! The junction block is what distributes the brake fluid to the front and rear, correct? | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 |
Bill Burmeister
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