2003-2006 Avalanche 4 Wheel Drive Selector Switch "NP1" 

• Dash Mounted 3 Button (4HI, 4LO, 2HI) 4x4 Switch
• Truck Without Auto 4WD Only (Rpo Code "NP1")
• Gray With White Printing
• Direct Bolt On And Plug In
• 2003, 2004, 2005, 2006 Chevrolet Avalanche With NP1
• Replaces Dealer OEM number 15136040, 19259312
• New Replacement Avalanche 4x4 Switch Built To OEM Specifications

(RPO) Codes -(Regular Production Option); 
 There is a white sticker on the inside of your glove box that lists all option (RPO) Codes (these codes were referred to when your truck was built); listed in numeric and alphabetic order. They are a series of letters and numbers formatted with how your vehicle was built. This particular Four Wheel Drive Selector Switch works with option code NP1 only (which you should find on your RPO Sticker).

Engagement of the four-wheel drive system is crucial during slick weather conditions. 1 Auto Shop provides you with the security of knowing that your switch will activate every time. Special attention has been paid to electrical and mechanical details to ensure proper functioning.

• Easy installation; just plug it in to the mating component
• Direct replacement matches original design
• Tough plastic housing for an extended life
• Tested to ensure trouble-free installation and durability