RHAOCZIYAUTO Engine Compartment Fuse Block for Chevy/GMC Silverado & Sierra 2020-2023 6.6L V8 — Direct-Fit Reinforced ABS

RHAOCZIYAUTO Battery Distribution Engine Compartment Fuse Block is a direct-fit replacement fuse/junction block engineered to protect and distribute power for 2020–2023 Chevy Silverado 2500/3500 HD and GMC Sierra 2500/3500 HD 6.6L V8 trucks.

This underhood fuse block replaces OEM part numbers such as 84732905, 84646135 and 85015810 and restores proper power routing to essential systems like the ECU, ABS pump and cooling circuits. Built from reinforced ABS and precision metal contacts, the assembly is designed to meet heavy-duty demands: heat, vibration and corrosion resistance help keep electrical faults and nuisance codes to a minimum. Whether you’re repairing a damaged junction block or upgrading a risky underhood connection, this unit returns factory-style performance and long service life.

How does this fuse block protect my truck’s electronics?

The block centralizes battery distribution and fusing for primary and auxiliary circuits, isolating faults before they reach sensitive modules. Correct fusing prevents overloads and helps avoid intermittent shorts that trigger warnings or limp-home modes.

• Directly routes power to ECU, ABS pump, cooling fan, and other high-current circuits
• Includes factory-style fuse ratings (examples: 60A, 100A, 125A, up to 500A bus protection)
• Robust contacts reduce heat and voltage drop under load
• Replaces OEM part numbers for guaranteed fit and function

Will this fit my 2021 Silverado/Sierra 6.6L V8?

Yes—this unit is manufactured to fit 2020–2023 Chevy Silverado 2500/3500 HD and GMC Sierra 2500/3500 HD models equipped with the 6.6L V8 diesel. It is made as a direct replacement for multiple GM OEM numbers, ensuring the connectors and mounting points align with factory locations.

• Compatible models: Silverado 2500HD/3500HD and Sierra 2500HD/3500HD, years 2020–2023
• Engine compatibility: V8 6.6L configurations
• OEM references: 84732905, 84646135, 85015810 and related numbers
• Designed for trucks with primary and auxiliary battery configurations

What materials and durability features should I expect?

The assembly uses reinforced ABS housing and high-quality metal terminals to withstand underhood stressors. That combination improves resistance to impact, abrasion, heat and corrosion—key factors for heavy-duty truck service life.

• Reinforced ABS plastic for impact and heat resistance
• Metal contact surfaces for low-resistance connections
• Engineered to resist vibration and environmental corrosion
• Manufactured to match OEM mechanical and electrical tolerances

How will installing this part change truck reliability and maintenance?

Replacing a worn or damaged fuse block reduces the chance of electrical faults that cause warning lights, failed starts or intermittent accessory failures. A properly functioning distribution block also helps technicians diagnose problems faster because power paths mirror factory diagrams.

• Decreases electrical fault frequency and diagnostic time
• Restores factory power routing for consistent startups and operation
• Limits heat buildup with secure, low-resistance contacts
• Minimizes the need for repeat replacements with durable construction

Who is this for: truck owners, fleet managers and professional technicians who maintain 2020–2023 Chevrolet Silverado 2500/3500 HD or GMC Sierra 2500/3500 HD trucks with the 6.6L V8 and need a reliable OE-style replacement for underhood battery distribution. It’s especially useful when the original junction block shows corrosion, physical damage, burnt terminals, or when troubleshooting recurring electrical faults.