RHAOCZIYAUTO Battery Distribution Fuse Block for Chevy/GMC 6.6L V8 2020-2023 — Direct-Fit OEM Replacement, Reinforced ABS

If you need a rugged underhood fuse block built to OEM tolerances, this RHAOCZIYAUTO unit replaces GM part numbers 84732905, 84646135, 85015810 and related variants. It’s engineered to sit in the engine bay of heavy-duty Silverados and Sierras and handle the electrical loads that modern diesel trucks demand. The assembly combines reinforced ABS housing with high-quality metal conductors to withstand heat, vibration, and road exposure while keeping critical circuits protected and organized.

How does this fuse block protect my truck’s electrical system?

This fuse block centralizes battery distribution and circuit protection for vital systems such as the ECU, ABS pump, and cooling components. By providing robust fuse and busbar connections it reduces the chance of blown circuits and intermittent faults that can trigger warning codes.

• Direct replacement for factory underhood junction blocks to preserve OEM wiring layout
• Supports high-current fuses (250A, 400A, 500A and multiple 60A/100A/125A circuits)
• Reinforced connections minimize voltage drop and heat buildup under load

Will it fit my Silverado or Sierra with the 6.6L V8 diesel?

Yes — this assembly is specifically designed for 2020–2023 Chevy Silverado 2500/3500 HD and GMC Sierra 2500/3500 HD trucks equipped with the 6.6L V8 diesel engine. It matches the mounting points, connector locations, and OE electrical spec so installation follows the factory footprint.

• Compatible models: Silverado 2500HD/3500HD and Sierra 2500HD/3500HD (2020–2023)
• Engine match: V8 6.6L diesel configurations only
• Replaces GM OE numbers including 84732905, 84646135, 85015810

What materials and construction make it durable in underhood conditions?

The fuse block uses a reinforced ABS plastic housing and precision metal terminals that resist abrasion, corrosion, heat, and mechanical stress. Those materials and finishes are selected to handle road grime, engine bay temperatures, and continuous vibration common to heavy-duty truck use.

• Reinforced ABS shell for impact and heat resistance
• Corrosion-resistant metal busbars and terminal hardware
• Designed to OEM tolerance levels for longevity and reliability

How does swapping this part affect vehicle performance and diagnostics?

Replacing a compromised underhood fuse block restores clean power distribution and reliable circuit protection, which helps prevent spurious error codes and intermittent electrical faults. Proper installation reduces risk of startup issues and improves the stability of engine-control and safety systems.

• Reduces electrical faults that can trigger diagnostic trouble codes
• Stabilizes power to ECU, ABS pump, and cooling components
• Maintains correct factory fuse amperages and circuit assignments

Who is this for: truck owners, fleet managers, and technicians who drive or service 2020–2023 Chevy Silverado 2500/3500 HD and GMC Sierra 2500/3500 HD 6.6L diesel trucks and want an OEM-fit, heavy-duty underhood fuse block that restores factory electrical performance. Choose this RHAOCZIYAUTO unit when you need a like-for-like replacement that meets original spec, handles high current loads, and resists the rigors of heavy-duty use.