★★★★★
October 14, 2026
Good switch
New switch has worked perfectly so far. Replacement video was right on and easy to follow.
Replaces
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Returns: Parts with electrical components cannot be returned once installed.
Attention California Customers:
WARNING: This product can expose you to chemicals including Lead and Lead Compounds, which are known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
This part fits 20 vehicles spanning 2003-2007.
| Year | Make | Model | Description |
|---|---|---|---|
| 2003-2004 | Chevrolet | Avalanche 1500 | Chevrolet Avalanche 1500 with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2003-2004 | Chevrolet | Silverado 1500 | Chevrolet Silverado 1500 with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2003 | Chevrolet | Silverado 1500 HD | Chevrolet Silverado 1500 HD with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2003-2004 | Chevrolet | Silverado 2500 | Chevrolet Silverado 2500 with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2003-2006 | Chevrolet | Silverado 2500 HD | Chevrolet Silverado 2500 HD with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2007 | Chevrolet | Silverado 2500 HD Classic | Chevrolet Silverado 2500 HD Classic with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2003-2006 | Chevrolet | Silverado 3500 | Chevrolet Silverado 3500 with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2007 | Chevrolet | Silverado 3500 Classic | Chevrolet Silverado 3500 Classic with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2003-2006 | Chevrolet | Suburban 1500 | Chevrolet Suburban 1500 with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2003-2006 | Chevrolet | Suburban 2500 | Chevrolet Suburban 2500 with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2003-2004 | Chevrolet | Tahoe | Chevrolet Tahoe with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2003-2004 | GMC | Sierra 1500 | GMC Sierra 1500 with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2003 | GMC | Sierra 1500 HD | GMC Sierra 1500 HD with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2003-2004 | GMC | Sierra 2500 | GMC Sierra 2500 with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2003-2006 | GMC | Sierra 2500 HD | GMC Sierra 2500 HD with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2007 | GMC | Sierra 2500 HD Classic | GMC Sierra 2500 HD Classic with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2003-2004 | GMC | Sierra 3500 | GMC Sierra 3500 with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2003-2004 | GMC | Yukon | GMC Yukon with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2003-2006 | GMC | Yukon XL 1500 | GMC Yukon XL 1500 with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| 2003-2006 | GMC | Yukon XL 2500 | GMC Yukon XL 2500 with RPO Code NP1 (Electric Shift, 2 Speed Transfer Case) Four Wheel Drive Switch DIY Solutions BSS00248 |
| Brand Label | Part Number |
|---|---|
| General Motors | 15136040 |
| General Motors | 19259312 |
This item may be interchangeable with parts from other brands with the above part numbers. This information is provided only for reference and does not guarantee that the item you are purchasing is identical to parts with part numbers from the brands listed above. To confirm that this item fits your vehicle, use the above "Check Vehicle Fit" option.
Lifetime Warranty
This item is backed by our limited lifetime warranty. In the event that this item should fail due to manufacturing defects during intended use, we will replace the part free of charge. This warranty covers the cost of the part only.
Returns: Parts with electrical components cannot be returned once installed.
FREE Shipping is standard on Orders shipped to the lower 48 States (Contiguous United States). Standard shipping charges apply to Hawaii, Alaska and US Territories. Shipping is not available to Canada.
Expedited is available on checkout to the United States, excluding Alaska, Hawaii and US Territories as well as P.O. Boxes and APO/FPO/DPO addresses. Final shipping costs are available at checkout.
New switch has worked perfectly so far. Replacement video was right on and easy to follow.
Works Great
Inexpensive option I tested out to see what was causing my service 4wd warning to come on. It wasn't the issue but it was an easy replacement
Perfect fit and function, Thanks A-1 Auto!
Easy install and perfect fit.
Was of similar or better quality than the OEM switch, quite a bit less expensive than prices at the local auto parts stores and install was a breeze thanks to the 1A Auto how-to video. After install I tried it out and it shifted back and forth from 4WD perfectly.
Fits perfectly
Good part, just wasn't the fix for the problem.
After watching the 1A Auto video about my non shifting problem I chose to purchase this switch. Easy install thanks to the video and the problem is solved. Thanks so much for the video the right part and speedy delivery.
I recently bought an '04 GMC Sierra Duramax. During the test drive, the Service 4WD warning came on. I bought the truck a bit below the asking price for this reason with the thought it may simply be the 4WD switch. The Service 4WD warning has yet to come back on, so far so good. Thank You 1A-Auto for your quality parts, great prices and awesome standard shipping promptness!
BSS00248
Light blue
