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

Product Overview

Get your truck back on the road with this heavy-duty, genuine NP261 (Option Code NP2) Transfer Case. This is the highly reliable Manual Floor Shift version designed specifically for the 1500 series pickups with an Automatic Transmission. Unlike the push-button models, the NP261 features a mechanical engagement system, offering superior durability and fewer electronic failures.

Vehicle Compatibility (1500 Series ONLY)

This unit is a direct fit for the following models equipped with a Manual Floor Shifter and Automatic Transmission:

• 1999–2006 Chevrolet Silverado 1500 (Excludes SS models)

• 2007 Chevrolet Silverado 1500 “Classic” (Old Body Style)

• 1999–2006 GMC Sierra 1500

• 2007 GMC Sierra 1500 “Classic” (Old Body Style)

Key Technical Specifications

• OEM Part Number: 12588517

• Hollander Interchange: 412-00430

• Option Code (RPO): NP2 (Verify this on your glovebox sticker)

• Model: New Process NP261

• Input Spline: 27-Spline (Matches 4L60E Transmission)

• Shift Type: Manual Floor Lever (2-Speed: 2HI, 4HI, Neutral, 4LO)

Why Choose Car Parts Direct?

• Professional Inspection: Every unit is bench-tested. We verify that the internal oil pump is seated correctly and that all gear ranges engage smoothly.

• High Reliability: The manual-shift NP261 is the preferred choice for truck owners looking to eliminate common electronic actuator and encoder motor issues.

• No Core Charge: This is an outright purchase. No need to deal with the hassle and expense of shipping your old core back to us.

Shipping Information

• FREE SHIPPING: Fast delivery within the 48 Continental United States.

• Processing Time: Ships within 1-2 business days.

• Carrier: Shipped via heavy-duty ground or freight (4-9 business days).

• Restrictions: We DO NOT ship this item to Canada.

Important Installation Note: This unit is shipped dry. You must fill it with the manufacturer-recommended fluid (AutoTrak II or Dexron VI depending on your specific year)