Curt Spectrum Brake Controller And Custom Harness For 2021 Chevy Silverado 1500
Updated 11/17/2025 | Published 12/09/2024
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Question:
What are the correct Curt Spectrum Brake Controller and custom harness part numbers for my 2021 Chevrolet Silverado 1500
asked by: Blaize
Expert Reply:
Hey Blaize, thanks for reaching out. We have just the thing! Here is what you will need for your 2023 Chevy Silverado 1500:
- Curt Spectrum Brake Controller w/ Custom Harness - Dash Mounted Knob - 1 to 4 Axles - Proportional # C36QV
This comes with the Spectrum controller, control knob and custom harness for your Silverado, so everything you need. The custom harness included with this kit is part # C51525. The video linked below will show you an example of installation. Let me know if you need anything else.
Product Page this Question was Asked From
Curt Spectrum Trailer Brake Controller - Dash Mounted Knob - Up to 4 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Plug-In
- Dash-Mounted Knob
- Behind-Dash
- Up to 4 Axles
- Indicator Lights
- Multiple Trailers
- CURT
more information >
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Jesse M.
11/17/2025
Hey Blaize, how did the Curt Spectrum brake controller and custom harness work out on your Silverado? Your feedback could really help others looking for the right setup for their truck.