---
product_id: 332372964
title: "Magnetic Fuel System Cap for GM 3.0L Duramax (2020–2026) | Fits Silverado & Sierra, Prevents Dirt & Contamination"
brand: "generic"
price: "HK$207"
currency: HKD
in_stock: true
reviews_count: 8
category: "Generic"
url: https://www.desertcart.hk/products/332372964-magnetic-fuel-system-cap-for-gm-3-0l-duramax-2020
store_origin: HK
region: Hong Kong
---

# Seals out moisture to prevent corrosion Magnetic holder for secure, convenient fueling Durable TPU material for rugged protection Magnetic Fuel System Cap for GM 3.0L Duramax (2020–2026) | Fits Silverado & Sierra, Prevents Dirt & Contamination

**Brand:** generic
**Price:** HK$207
**Availability:** ✅ In Stock

## Summary

> 🛠️ Lock in clean fuel, unlock worry-free drives!

## Quick Answers

- **What is this?** Magnetic Fuel System Cap for GM 3.0L Duramax (2020–2026) | Fits Silverado & Sierra, Prevents Dirt & Contamination by generic
- **How much does it cost?** HK$207 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/332372964-magnetic-fuel-system-cap-for-gm-3-0l-duramax-2020)

## Best For

- generic enthusiasts

## Why This Product

- Trusted generic brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Magnetic Cap Holder Included:** Innovative magnetic button keeps your cap secure and accessible while fueling—no more lost or misplaced caps.
- • **Ultimate Dirt & Moisture Barrier:** Keeps contaminants and water out of your fuel system, protecting your engine’s performance and longevity.
- • **Precision Fit for GM 3.0L Duramax:** Engineered specifically for Silverado & Sierra 3.0L diesel models, ensuring perfect compatibility and peace of mind.
- • **Advanced 3D Printed TPU Construction:** Crafted from tough thermoplastic rubber for long-lasting durability that withstands daily wear and harsh conditions.
- • **Made in Michigan with Quality Assurance:** Proudly manufactured in the USA, combining local craftsmanship with high standards for reliability.

## Overview

This Magnetic Fuel System Cap is a precision-engineered accessory designed exclusively for GM 3.0L Duramax diesel engines in Silverado and Sierra 1500 pickups (2020–2026). Made from durable 3D printed TPU material, it effectively seals out dust and moisture, safeguarding your fuel system from contamination. Featuring a magnetic holder for easy cap management during refueling, this Michigan-made cap offers a simple yet essential upgrade to protect your investment and maintain peak engine performance.

## Description

Fuel system cap for General Motors 3.0 Diesel in 1500 pickups. Protect your vehicle's fuel system from unwanted dirt or water. This is specifically for the Duramax Diesel capless fuel system on the Silverado Sierra 3.0L Duramax Diesel engine. If it doesn't have that specific engine in a Half-ton pickup I cannot guarantee fitment. Made of 3D printed TPU material giving it a tough, reliable fit. Just slide it onto your fuel filler neck and it'll keep all the debris away.

Review: Fits fine, good quality, cheap protection. - I have a 2023 GMC Sierra 1500 Denali and added the fuel cap. It's good quality, fits perfectly. They included a metal, self-adhesive button (and an alcohol swab for cleaning) to put on the fuel/DEF door so it has a secure place when fueling. Works fine. Seems like a good thing to do to protect a $15K engine issue. Obviously GMC doesn't think it's needed but I wanted the fuel as secure as the DEF.
Review: Nice little cap Made in Michigan! - Great little cap to keep debris from potentially entering your fuel system. Fits just tight enough feel solid. Typical printed material that should hold up since it really just a press in cap. No threads to strip or break. Plus, it appears to be made in Michigan, my home state! Some say the magnet is too weak, well it's just there to hold the cap when you are fueling. seems strong enough for the intended job. Better than tossing the cap onto your bed rail! The printed "Diesel Fuel Only" is a nice touch top remind my wife the truck take diesel unlike her Blazer.

## Features

- 3D Printed out of Durable TPU Material
- Keeps out moisture
- Keeps out Dust
- Protects Vehicles Fuel System

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B091MS1HX2 |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #16,996 in Automotive ( See Top 100 in Automotive ) #2,357 in Automotive Exterior Accessories |
| Brand | Generic |
| Color | Green |
| Customer Reviews | 4.6 4.6 out of 5 stars (621) |
| Date First Available | April 4, 2021 |
| Item Weight | 0.81 ounces |
| Item dimensions L x W x H | 2.36 x 2.36 x 0.59 inches |
| Item model number | DFO3.0 |
| Manufacturer | KPCreations |
| Manufacturer Part Number | DFO3.0 |
| Material | Thermoplastic Rubber |
| Product Dimensions | 2.36 x 2.36 x 0.59 inches |
| Style | Tpu |
| Vehicle Service Type | Chevrolet Silverado 1500 3.0 diesel, Chevrolet Tahoe 3.0 Diesel, GMC Sierra 1500 3.0 diesel, GMC Yukon 3.0 Diesel |

## Product Details

- **Brand:** Generic
- **Color:** Green
- **Item dimensions L x W x H:** 2.36 x 2.36 x 0.59 inches
- **Material:** Thermoplastic Rubber

## Images

![Magnetic Fuel System Cap for GM 3.0L Duramax (2020–2026) | Fits Silverado & Sierra, Prevents Dirt & Contamination - Image 1](https://m.media-amazon.com/images/I/81UmklBo4LL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fits fine, good quality, cheap protection.
*by P***. on January 22, 2026*

I have a 2023 GMC Sierra 1500 Denali and added the fuel cap. It's good quality, fits perfectly. They included a metal, self-adhesive button (and an alcohol swab for cleaning) to put on the fuel/DEF door so it has a secure place when fueling. Works fine. Seems like a good thing to do to protect a $15K engine issue. Obviously GMC doesn't think it's needed but I wanted the fuel as secure as the DEF.

### ⭐⭐⭐⭐⭐ Nice little cap Made in Michigan!
*by P***G on June 9, 2025*

Great little cap to keep debris from potentially entering your fuel system. Fits just tight enough feel solid. Typical printed material that should hold up since it really just a press in cap. No threads to strip or break. Plus, it appears to be made in Michigan, my home state! Some say the magnet is too weak, well it's just there to hold the cap when you are fueling. seems strong enough for the intended job. Better than tossing the cap onto your bed rail! The printed "Diesel Fuel Only" is a nice touch top remind my wife the truck take diesel unlike her Blazer.

### ⭐⭐⭐⭐⭐ Tight fit
*by M***3 on February 9, 2026*

Good tight fit. Keeps the snow out of the fuel filler neck.

## Frequently Bought Together

- Generic GM 3.0 Fuel system cap Magnetic Green Green
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**Shop now:** [https://www.desertcart.hk/products/332372964-magnetic-fuel-system-cap-for-gm-3-0l-duramax-2020](https://www.desertcart.hk/products/332372964-magnetic-fuel-system-cap-for-gm-3-0l-duramax-2020)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-03-06*