Fleece FPE-HAR-GM-NSBU-0104 NSBU Pigtails | 2001-2004 GM 6.6L Duramax w/ Allison Transmission

Features:

• Direct replacement for damaged NSBU connectors
• Fits 2001-2004 GM Allison 1000/2000 transmissions
• Includes two pigtails with 6-inch wire leads
• Comes with heat-sealable butt connectors
• Manufactured with precision automated processes
• Ensures proper transmission range sensor function
• Pre-crimped terminals for secure connections
• Helps resolve shifting or start-up issues
• Durable construction for long-term reliability
• OEM-style fit and performance
• Quick and easy installation process
• Made in the USA by Fleece Performance

Solve Common Allison Transmission Issues with Confidence

If your 2001-2004 GM Duramax with the Allison 1000 or 2000 Series transmission is showing shifting problems or start-up issues, there’s a good chance the NSBU switch wiring is the culprit. Fleece Performance makes it easy to restore proper transmission operation with their NSBU Pigtail Kit. This kit comes complete with a pair of high-quality replacement connectors, each with a pre-attached 6-inch pigtail. Designed to replace damaged or worn-out factory connectors, these pigtails ensure reliable signal transmission from your Neutral Safety Backup (NSBU) switch. Fleece produces these harnesses in-house using fully automated wire cutting and terminal crimping, delivering precision-built components that fit and function just like the factory originals. Whether you’re addressing a no-start condition or unpredictable shifting, this kit provides a simple, dependable solution to keep your Allison transmission performing as it should.

Durable, Easy-to-Install, and Built to Last

Each Fleece NSBU Pigtail Kit includes everything you need to get the job done right, including heat-sealable butt connectors that provide a moisture-resistant, long-lasting connection. The pre-crimped terminals and color-matched wiring make installation straightforward, helping you avoid the hassle of guessing wire locations or splicing together inferior connections. Once installed, you can count on these pigtails to withstand the demands of daily driving, towing, and heavy-duty work. Built to meet or exceed OEM specifications, these pigtails offer peace of mind by resolving common wiring failures that affect transmission range sensor performance. Whether you’re maintaining a fleet of work trucks or keeping your personal Duramax in top condition, this kit from Fleece Performance is the professional-grade fix you’ve been looking for.

Fits: 2001, 2002, 2003, 2004 GM 6.6L Duramax w/ Allison Transmission

Application Note: Fits 2001-2004 GM vans and trucks with the Allison 1000/2000 Series transmission