NP261 Transfer Case 1999-2007 Silverado Sierra 1500 Floor Shift AT | OEM 12588517

NP261 Transfer Case 1999-2007 Silverado Sierra 1500 Floor Shift AT | OEM 12588517

Used OEM NP261 manual floor-shift transfer case (RPO NP2), part 12588517, for 1999–2007 Chevrolet Silverado and GMC Sierra 1500 pickups with an automatic transmission. Bench-tested, no core charge.

Fitment: NP261 Transfer Case 1999-2007 Silverado Sierra 1500 Floor Shift AT | OEM 12588517

• 1999–2006 Chevrolet Silverado 1500 (except SS)
• 2007 Chevrolet Silverado 1500 Classic (old body style)
• 1999–2006 GMC Sierra 1500
• 2007 GMC Sierra 1500 Classic (old body style)
• Manual floor shifter with automatic transmission (4L60E) only

Part numbers

• OEM part number: 12588517
• Hollander interchange: 412-00430
• RPO option code: NP2 (check your glovebox sticker)

Condition & notes

• New Process NP261, 27-spline input
• Manual floor lever: 2HI, 4HI, Neutral, 4LO
• Bench-tested; all ranges engage smoothly
• No core charge
• Shipped dry: fill with the factory-specified fluid (AutoTrak II or Dexron VI, depending on year) before driving

Photos

Shipping, warranty & fitment help

Shipping is free to the USA and Canada, and this part is covered by our 30-day replacement warranty. Please confirm fitment by part number or VIN before ordering: you can check your vehicle details with the free NHTSA VIN decoder. Looking for something else? Browse more Transmission & Axles parts.