DEF FILL CAP - BLUE ALUMINUM ('13-'18, 2500/3500)

Item #: LT-DEF-CAP
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This blue anodized billet aluminum dust cap has DEF engraved into the cap and has two external O-rings that slide into the Diesel Exhaust Fluid neck. The cap can be attached to the original DEF cap tether.

Complements the green aluminum fuel fill cap. Get both for your truck!


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aluminum DEF cap
Dec 7, 2017  |  By sam greenberg
Fits perfectly and being color coded is helpful.

Nice Upgrade
Nov 3, 2017  |  By Mike
Nice upgrade and good fitment.

Jul 19, 2017  |  By Denise Moitoza
After being utterly shocked that buying a brand new Dodge truck does not get you a fuel tank or DEF tank cap I found that Genos Garage sold them. These are really nice and high quality. Don't be fooled by other cheaper versions THEY DON'T FIT PROPERLY! These fit properly and look nice.

Blue Aluminum DEF cap
Jun 24, 2017  |  By Corbin Sterle
The longevity of my Ram 2500 will now be a little more ensured with the new aluminum DEF cap installed. I won't have to worry about contaminants entering the system, as well as the plastic cap disintegrating soon. Plus it looks very sharp and clean.

Jan 31, 2017  |  By Sheldon
Excellent fit and looks stylish! Real Quality piece fits great!

Feb 7, 2016  |  By AJ Bimrose
DEF cap looks great! Easy to install using the factory tether.

Install and Tech Information