AT4X OEM Fender Flares fit other trims?

[EXSlider400]

Has anyone swapped their fender, flares for the wider ones that come with the AT4X? It looks like it would require not only the flares, but the end caps as well?

 

I think these are the GM part numbers (showing most current not the ones it replaces). 
 

Front Left: 86507835

Front Right: 86507836

Rear Left: 84660041

Rear Right: 85044876

 

 

[newdude]

You'd need it all to do it correctly as even the lower bits are wider to match the flares.

 

These below are AT4X without the AEV edition.  

 

Front flares:

86507835 - Backordered, you'll need an AT4X HD VIN to order

85788557

 

Front protectors at the rear of the front wheel well:

85543615

85045303

 

Front bumper flare extensions:

85543553

85543550

 

Rear flares:

85044875

85044876

 

Rear protectors at front of rear flares:

86538194

86538193

 

Rear protectors at the rear of rear flares:

85543620

85543621

Edited August 23, 2025 by newdude

[EXSlider400]

Thanks. That is great information. 

[Chuy1986]

I'm looking to do the opposite. I want to color match my fender flares but the dealer only offers non AT4X flares in the color of my truck. Do you know if the non AT4X flares fit the end caps that come with it and will they just "bolt" on?

[kylant]

On 1/26/2026 at 5:18 AM, Chuy1986 said:

I'm looking to do the opposite. I want to color match my fender flares but the dealer only offers non AT4X flares in the color of my truck. Do you know if the non AT4X flares fit the end caps that come with it and will they just "bolt" on?

the caps are different. you have to get non-at4x caps to match non-at4x flares. best bet would be to go aftermarket

[friasd]

hello everyone does anyone know if the fender flares from a GMC 2500 sierra AEV would fit a silverado 2500 AEV , that is the only thing missing from my silverado , i believe 

[OS RR]

No, GMC and Chevy flares are not cross compatible. Fender openings are very different.

[newdude]

On 4/3/2026 at 2:53 AM, friasd said:

hello everyone does anyone know if the fender flares from a GMC 2500 sierra AEV would fit a silverado 2500 AEV , that is the only thing missing from my silverado , i believe 

 

 

 

No.  They don't share fenders/box side aka fender shapes.  Rounded wheel openings vs. squared.    

 

The Silverado HD ZR2 Bison has fender flares, just not lighted ones like GMC does.  

 

[KTDanforth]

Its kind of a bummer,  the GMC lights are a nice upgraded touch,  I have not seen and after market one either.

 

I would love to be wrong here.