01-04 SILVERADO/SIERRA 2500/3500DURAMAX NSBU PIGTAILS

NSBU Switch Pigtail — 2001–2004 GM Silverado/Sierra 2500/3500 Duramax

The Neutral Safety Back-Up (NSBU) switch pigtail connector on 2001–2004 GM Silverado and Sierra 2500/3500 Duramax trucks is a common failure point — corrosion and heat damage to the connector leads to transmission range sensor faults, no-start conditions, and backup light failures. This direct-fit replacement pigtail restores a clean, reliable electrical connection to the NSBU switch, resolving these issues without replacing the entire switch assembly.

Key Features

• Direct-Fit Replacement — Engineered specifically for 2001–2004 GM Silverado/Sierra 2500/3500 with the Duramax diesel and Allison transmission
• Resolves NSBU Fault Codes — Restores proper electrical signal to clear transmission range sensor DTCs
• Fixes No-Start & Backup Light Issues — Repairs the root cause of common NSBU-related electrical failures
• Cost-Effective Fix — Repair the connector without replacing the entire NSBU switch assembly
• Quality Construction — Built to withstand transmission tunnel heat and vibration for long-term reliability

Fitment

• 2001–2004 Chevrolet Silverado & GMC Sierra 2500/3500 HD
• 6.6L Duramax Diesel with Allison Transmission

SKU: FPE-HAR-GM-NSBU-0104 | Vendor: XDP