Description

Fits 

Year	Make	Model
2011-2016	GMC/Sierra	2500/3500
2011-2016	Chevrolet/Silverado	2500/3500

Note: This cap only fits factory oil fill necks on 2011-2016 Duramax engines OR trucks equipped with an HSP forward-facing thermostat housing/oil fill neck kit. 

Dress up your Duramax with the HSP Billet Oil Fill Cap, precision-machined from 6061 aluminum for a perfect fit and a killer look under the hood. Built to seal tight with a fresh O-ring, this cap isn’t just for style; it’s made to perform. Pair it with your HSP Oil Fill Neck or run it solo; either way, it’s a solid upgrade for any diesel enthusiast.

Part Number: HSP-D-042-HSP

Features  

• CNC billet aluminum 
• Durable powder coat options 
• New O-ring included 
• Direct Duramax fit 
• Clean engine bay look