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| Brand | Curt |
| Install Time | 20 min |
| Manufacturer Warranty | Limited 1 Year |
| Installation Instructions - Part 1 | Click Here for instructions (PDF format) |
Curt Custom Wiring Harness
Curt 56003
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7' CUSTOM WIRING EXTENSION HARNESS (ADDS 4-WAY, 7-WAY RV BLADE TO TRUCK BED) #56003
FITS:
GMC Sierra 1500
2019 2020 2021 2022 2023 2024 2025
Chevrolet Silverado 1500
2019 2020 2021 2022 2023 2024 2025
GMC Sierra 2500 & 3500 HD
2020 2021 2022 2023 2024 2025 2026
Chevrolet Silverado 2500 & 3500 HD
2020 2021 2022 2023 2024 2025 2026
Chevrolet Silverado 1500 Limited 2022
GMC Sierra 1500 Limited
2022
Routes a dual-output socket into truck bed while retaining use of rear socket
Provides standard 4-way flat and 7-way RV blade
Simple plug-and-play design eliminates the need for cutting or splicing
Allows for easy connection of 5th wheel or gooseneck wiring
4-way flat output connects tail lights, brake lights and turn signals
7-way connects tail, brake, reverse, turn signals, brakes and auxiliary power
7' extension with right-angle plug for easy installation
Spring-loaded dust covers keep connectors clean when not in use
Slit loom keeps wires contained and well protected
Notes:
Factory cutout in truck bed required for installation
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