Features:
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Advanced Co-Pilot transmission controller for Allison 6-speed conversions
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Designed for 2006–2024 GM Duramax 6.6L applications
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Enables full control and optimization of the Allison transmission shift strategy
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Improves drivability, shift quality, and transmission durability
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Supports higher horsepower builds and aggressive tuning
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Includes wiring harness, control module, and installation hardware
The ATS 601-904-4308 Allison 6-Speed Conversion Co-Pilot is the ultimate controller for GM Duramax owners upgrading or modifying their Allison transmissions. Whether you're converting a 5-speed to a 6-speed or enhancing shift logic in a tuned truck, this unit provides superior control over line pressure, torque converter lockup, and gear selection. Built for towing and high-performance use, the Co-Pilot ensures your transmission operates safely and efficiently even under heavy loads or boosted power levels.
Fitment: 2006–2024 GM Silverado / Sierra 2500HD / 3500HD 6.6L Duramax
Warranty: 5-year limited warranty from ATS Diesel
Fitment Notes: Compatible with 6-speed Allison transmissions. Custom tuning recommended for best performance. Not required for stock transmissions. Professional installation and calibration recommended.
ATS 601-904-4308 Allison 6-Speed Conversion Co-Pilot Transmission Controller | 2006-2024 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
ATS Diesel Performance
MSRP:
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MSRP:
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$1,175.00
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ATS Diesel Performance
ATS 601-904-4308 Allison 6-Speed Conversion Co-Pilot Transmission Controller | 2006-2024 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
- SKU:
- ATS601-904-4308
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ATS Diesel Performance
ATS 601-924-4308 Allison Co-Pilot Transmission Controller | 2006-2010 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
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ATS Diesel Performance
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ATS Diesel Performance
ATS 601-924-4248 Allison Co-Pilot Transmission Controller | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax
MSRP:
Was:
Now:
(Inc. Tax)
MSRP:
Was:
Now:
$1,175.00

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ATS Diesel Performance
ATS 601-924-4368 Allison Co-Pilot Transmission Controller | 2011-2015 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LML
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MSRP:
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