Modifications & Accessories

1,137 topics in this forum

1. Brand new to this forum. Questions about re-gearing my 26’ HD

   By BDS my HD, June 14
   • 13 replies
   • 710 views
   • 
   • chris21
   • June 17

2. Detroit Truetrac differential

   By GAMark, June 8
   • 1 reply
   • 329 views
   • 
   • newdude
   • June 8

3. Tonneau cover 1 2

   By GAMark, April 4
   • 16 replies
   • 1.8k views
   • 
   • Coastie05
   • June 7

4. How can I wire this up? 1 2 3

   By sage55, November 26, 2023   

   • led
   • 2500HD
   • (and 2 more)

     Tagged with:

     • led
     • 2500HD
     • at4
     • light bar
   • 34 replies
   • 19.2k views
   • 
   • PBNB
   • June 3

5. Accessory install using upfitter switches 2025 3500 L5P

   By Chris Lungstrass, May 30
   • 3 replies
   • 688 views
   • 
   • PBNB
   • May 31

6. Always on LED lights up front

   By dieselfan1, May 31
   • 2 replies
   • 409 views
   • 
   • frank6150
   • May 31

7. Colored brake calipers on a HD???

   By dieselfan1, March 30
   • 8 replies
   • 955 views
   • 
   • Chuck FB
   • May 15

8. 2022 Sierra elevation refresh passenger seat upgrade

   By AliBasha, February 26
   • 7 replies
   • 787 views
   • 
   • tioran
   • May 13

9. xm antenna module location

   By Gregg Staples, December 25, 2023
   • 5 replies
   • 3.6k views
   • 
   • Gregg Staples
   • May 12

10. AT4X 2500 Airbag Installation - Great Kit!

    By AT4X Steve, March 31
    • 1 reply
    • 804 views
    • 
    • asilverblazer
    • May 7

11. Dialed in for summer

    By dieselfan1, April 15
    • 3 replies
    • 770 views
    • 
    • dieselfan1
    • May 6

12. AT4X OEM Fender Flares fit other trims?

    By EXSlider400, August 22, 2025
    • 8 replies
    • 3.4k views
    • 
    • KTDanforth
    • April 17

13. Zr2 front suspension 1 2 3 4 28

    By Joe97281, December 4, 2023
    • 409 replies
    • 80.6k views
    • 
    • kylant
    • April 3

14. Tow mirror delete and replace

    By Krogers4871, March 18
    • 7 replies
    • 823 views
    • 
    • Another JR
    • March 30

15. Rubber Bed Mat Gooseneck Holes

    By JW2024, March 26
    • 1 reply
    • 545 views
    • 
    • Another JR
    • March 28

16. L8T - Diablosport Tuner - I bought one and have real data !

    By Shatterz, March 18
    • 7 replies
    • 1.5k views
    • 
    • Pryme
    • March 27

17. Rough Country mudflap delete

    By dieselfan1, March 21
    • 1 reply
    • 425 views
    • 
    • OS RR
    • March 21

18. Speedometer recalculation for larger tires

    By AbzDad, March 11
    • 1 reply
    • 495 views
    • 
    • chris21
    • March 21

19. Speedo correction after wheel/tire swap

    By Walkerman, March 7, 2024
    • 12 replies
    • 14.3k views
    • 
    • chris21
    • March 21

20. Black door handles and mirror covers

    By Jksvet, February 28
    • 7 replies
    • 770 views
    • 
    • KTDanforth
    • March 19

21. Cargo Lamp Flasher?

    By MrMoMotionMan, March 19
    • 0 replies
    • 261 views
    • 
    • MrMoMotionMan
    • March 19

22. 2026 Silverado 2500HD Bumper Question

    By asperjack, March 8
    • 4 replies
    • 829 views
    • 
    • KTDanforth
    • March 13

23. Replacing Shocks - Question

    By darleyhavidson, March 9
    • 1 reply
    • 705 views
    • 
    • asilverblazer
    • March 10

24. GMC Retractable Bed Cover Question

    By wheeler459, March 9
    • 0 replies
    • 406 views
    • 
    • wheeler459
    • March 9

25. How to add cab lights to a 2020+ Silverado 1 2 3

    By hotairgypsy, April 10, 2021
    • 42 replies
    • 73.1k views
    • 
    • chrisrud15
    • March 8