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  See more parts for GMC Sierra 2500 HD
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System1 Designs -10an to -12an ORB Black Reducer Union Fitting - S1D 5820
System1 Designs fittings are produced right here in the USA by one of the top manufacturers in the industry. With the System1 Designs team having many years in the field, we have used our fair share of plumbing components over time and we are confident we found the best product to fit the bill. These fittings are made out of high quality material, precision machined, and anodized PROPERLY. This means you don't have to worry about them breaking, leaking, or fading over the years. They are HIGHLY resistant to scratching, which is one of our biggest concerns beyond how they perform.

System1 Designs fittings can be used for all types of fuel, oil, coolant, hydraulic fluid, and pressurized air. They meet and exceed all S.A.E. standards and NHRA standards.


Features:
  • Wider wrench area than most fittings on the market
  • Precision thread design to prevent gulling
  • Available in ALL BLACK only, no time for fancy colors
Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle Make/Model
GMC Sierra 2500 HD 2020-2025 Denali
GMC Sierra 2500 HD 2020-2025 SLT
GMC Sierra 2500 HD 2020-2025 SLE
GMC Sierra 2500 HD 2020-2021 Base
GMC Sierra 2500 HD 2020-2025 AT4
GMC Sierra 2500 HD 2022-2025 Pro
GMC Sierra 2500 HD 2024-2025 AT4X
GMC Sierra 2500 HD 2024-2025 Denali Ultimate
GMC Sierra 3500 HD 2020-2025 SLE
GMC Sierra 3500 HD 2020-2025 AT4
GMC Sierra 3500 HD 2020-2025 Denali
GMC Sierra 3500 HD 2020-2021 Base
GMC Sierra 3500 HD 2020-2025 SLT
GMC Sierra 3500 HD 2022-2025 Pro
GMC Sierra 3500 HD 2024-2025 Denali Ultimate

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