Description
Warranty & Shipping
How-To & Tools
Product Reviews
Q&A
Vehicle Fit

Specifications:

  • Dash Mounted 4WD (Four Wheel Drive) Switch
  • Four selection dash control (2HI, 4HI, 4LO, AUTO 4WD)
    • Fits models with AUTO 4WD Transfer Case - RPO Code "NP8"
  • Direct replacement
  • Built to strict quality control standards

NOTE: If you have any questions about this fitting your application, please call your local GM dealer with the above part numbers.

Our electrical and electronic parts are subject to strict quality control testing. Please ensure proper diagnosis of this item before purchasing as the item cannot be returned once installed or plugged in.

Item Condition: New

Attention California Customers:

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

  1. step : Removing the 4WD Switch (1:18)
    • Pop out the dashboard trim by hand
    • Turn the ignition on
    • Shift the shifter to its lowest position
    • Lower the steering wheel to its lowest position
    • Remove the dash trim
    • Place the vehicle in park
    • Pry out the switch with a trim tool by pressing the tabs
    • Disconnect the wiring harnesses
  2. step : Installing the 4WD Switch (2:30)
    • Connect the connectors
    • Press the switch into the dash
    • Shift the shifter to its lowest position
    • Press on the dashboard trim
    • Place the vehicle in park
    • Raise the steering column

Tools needed for replacement:

    Specialty Tools

  • Trim Tool Set

4.95/ 5.0
20 reviews
5 Stars
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Very happy with my 1a shopping and purchase experience. Great customer service rep. On the phone. Reasonable price and quickly received the item 1a had in stock. Would recommend 1aauto.
February 6, 2017
4 wheel drive switch
I purchased the truck used and always had a problem shifting into 4 wheel drive, that was until I saw your youtube video it works perfectly now, thanks for the help.
February 19, 2017
the switch was a perfect fit. The package arrived sooner than I thought it would, and the replacement was easy to install. 1A made purchasing the item easy, and I would recommend using 1A auto for anyone looking for auto parts distributor. Thank you
February 20, 2017
excellent
product worked perfectly. love the instructional videos
February 25, 2017
Great items at a great price
The switch was at a great price and shipping was fast
March 4, 2017
FOUR WHEEL DRIVE SWITCH 2005 GMC
INSTALLED THIS SWITCH IN 15 MINUTES, VERY PLEASED WITH THIS PART WORKED LIKE A CHARM. EXCELLENT PRICE AND VIDEO. WILL USE YOU AGAIN. TOM OC.
March 20, 2017
Fixed it
The switch arrived quickly and was a direct replacement for factory switch. Fixed my problem of the auto 4wd malfunction.
March 30, 2017
Great product
First of several orders from 1a. They were polite and professional in helping me identify exactly which switch I needed. This particular item was a plug and play part that took less than 10 minutes to install. The price was right, the part refreshed a dated look and fixed my issue quickly.
April 4, 2017
Arrived quickly
Thes seem to go bad every six months on my 05 Suburban. Cheap enough and easy enough to just replace. Wish someone would guarantee the part to last a year or more.
May 13, 2017
As ordered
It works. Unfortunately it was not the answer to my problem. As far as the product goes, it was cheap, fast shipping and now my 4x4 numbers are no longer worn out. My dash looks nicer...now onto figuring out whats wrong with my 4x4 system.
September 24, 2017
Perfect Fit
He switch fit perfectly. Install took about 3 minutes. If I needed to Id purchase this product again.
September 30, 2017
Four wheel drive switch
This switch is just perfect for my truck. My old one worked but the lights were out. It was less hassel to get a replacement than to fix the old one. Installation was easy and only took me about 10 minutes total. I received it quickly when ordered. Was the first thing I have ordered but wont be the last. Thank you.
December 3, 2017
4 x 4 switch
Switch was shipped out and received with in 3 days.switch works perfectly.Indicator lights all work just a little dimmer from oem. I would recommend this item to others!! Great service.
April 19, 2018
Yukon 4x4 selector
Perfect fit, as described and got rid of my service 4x4 light.. perfect! TY
June 25, 2018
4x4 works
4x4 works well with this part hope it will stop the service 4wd light from coming on.
July 5, 2018
Product was very good. Just like the Original one that came in the truck. Easy to install.
July 20, 2018
Great service
I ordered my 4x4 control switch and had it sent over night. I received the part on time and with no problems at all. I would recommend this company to anyone for fast service and the price was great as well.
August 1, 2018
4 wheel drive switch
It arrived within 3 days after ordering. The part was installed easily and took less than 10 minutes, works perfectly. I would recommend this part
August 21, 2018
Perfect fit
Quick shipping, easy to install, fixed my problem. Ive bought a couple of other things from 1A Auto since with the same results.
September 25, 2018
Exactly what I ordered
Received the day I was supposed to and was the product I ordered.
November 5, 2018
Will this fit my car? Add a vehicle to make sure
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
4wd service message. Are these 4wd switches prone to faulty? I hate guessing. Not sure if I can test the old one with my meter.
Dave R June 24, 2018
Very prone to being faulty, I’ve changed mine twice in 5 years.
Chris B June 25, 2018
My switch went bad slowly, seemed like when the dash was headed up from the defroster. But eventually failed all together. My dash read service 4w.d.
Kenneth C June 25, 2018
The transfer case it could be wrong with the four-wheel-drive of Your vehicle Not the swish
Jose R June 25, 2018
Not sure about them being faulty, but I replace mine and its fine now. Im not a mechanic
Tommy E June 26, 2018
Where will i find RPO code at?
David B July 1, 2018
There should be a sticker in your glove box containing all your vehicles 3-digit RPO numbers.
Tim K July 1, 2018
Year Make Model Description
2006-2007Cadillac Escalade Cadillac Escalade Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2006-2007Cadillac Escalade ESV Cadillac Escalade ESV Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2006-2007Cadillac Escalade EXT Cadillac Escalade EXT Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2003-2006Chevy Avalanche 1500 Chevy Avalanche 1500 Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2003-2006Chevy Silverado 1500 Chevy Silverado 1500 Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2007Chevy Silverado 1500 Classic Chevy Silverado 1500 Classic Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2003Chevy Silverado 1500 HD Chevy Silverado 1500 HD Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2005-2006Chevy Silverado 1500 HD Chevy Silverado 1500 HD Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2007Chevy Silverado 1500 HD Classic Chevy Silverado 1500 HD Classic Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2003-2004Chevy Silverado 2500 Chevy Silverado 2500 Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2003-2006Chevy Silverado 2500 HD Chevy Silverado 2500 HD Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2007Chevy Silverado 2500 HD Classic Chevy Silverado 2500 HD Classic Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2003-2004Chevy Silverado 3500 Chevy Silverado 3500 Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2003-2006Chevy Suburban 1500 Chevy Suburban 1500 Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2003-2006Chevy Suburban 2500 Chevy Suburban 2500 Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2003-2006Chevy Tahoe Chevy Tahoe Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2003-2006GMC Sierra 1500 GMC Sierra 1500 Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2007GMC Sierra 1500 Classic GMC Sierra 1500 Classic Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2003GMC Sierra 1500 HD GMC Sierra 1500 HD Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2005-2006GMC Sierra 1500 HD GMC Sierra 1500 HD Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2007GMC Sierra 1500 HD Classic GMC Sierra 1500 HD Classic Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2003-2004GMC Sierra 2500 GMC Sierra 2500 Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2003-2006GMC Sierra 2500 HD GMC Sierra 2500 HD Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2007GMC Sierra 2500 HD Classic GMC Sierra 2500 HD Classic Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2003-2004GMC Sierra 3500 GMC Sierra 3500 Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2003-2006GMC Yukon GMC Yukon Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2003-2006GMC Yukon XL 1500 GMC Yukon XL 1500 Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
2003-2006GMC Yukon XL 2500 GMC Yukon XL 2500 Four Wheel Drive Switch for Models with Electric 4 Wheel Drive and RPO Code NP8 (Push Button, 2 Speed Transfer Case)
Part #: 1AFWM00042


Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

How-to Video:

(03:57 min)