Modifications & Accessories

1,123 topics in this forum

1. ZR2/AT4X Part Numbers & Conversion Info 1 2 3

   By Epsilon Plus, December 18, 2023
   • 38 replies
   • 19.1k views
   • 
   • kylant
   • April 14

2. Installing a transmission dipstick for the 6L90 (L8T gas trucks) using factory fit GM parts. 1 2 3 4 5

   By Epsilon Plus, October 28, 2022
   • 60 replies
   • 62.7k views
   • 
   • Out in the Shop
   • December 5, 2025

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

   By BDS my HD, Sunday at 04:36 AM
   • 1 reply
   • 93 views
   • 
   • davester
   • Sunday at 11:12 AM

4. Detroit Truetrac differential

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

5. Tonneau cover 1 2

   By GAMark, April 4
   • 16 replies
   • 1.3k views
   • 
   • Coastie05
   • June 7

6. Torsion adjustment

   By riddler, June 2
   • 10 replies
   • 474 views
   • 
   • riddler
   • June 5

7. 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
   • 18.4k views
   • 
   • PBNB
   • June 3

8. Accessory install using upfitter switches 2025 3500 L5P

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

9. Always on LED lights up front

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

10. Denali Grille question

    By Puckgrinder85, May 20
    • 1 reply
    • 292 views
    • 
    • Crazy Canuck
    • May 27

11. Colored brake calipers on a HD???

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

12. 2022 Sierra elevation refresh passenger seat upgrade

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

13. xm antenna module location

    By Gregg Staples, December 25, 2023
    • 5 replies
    • 3.4k views
    • 
    • Gregg Staples
    • May 12

14. Trailer TPS Sensor Question Rim Size

    By bruceb58, May 10
    • 3 replies
    • 363 views
    • 
    • bruceb58
    • May 10

15. AT4X 2500 Airbag Installation - Great Kit!

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

16. Dialed in for summer

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

17. side view camera

    By Tim Cullins, April 28
    • 8 replies
    • 616 views
    • 
    • PBNB
    • May 1

18. AT4X OEM Fender Flares fit other trims?

    By EXSlider400, August 22, 2025
    • 8 replies
    • 2.6k views
    • 
    • KTDanforth
    • April 17

19. Zr2 front suspension 1 2 3 4 28

    By Joe97281, December 4, 2023
    • 409 replies
    • 77k views
    • 
    • kylant
    • April 3

20. Tow mirror delete and replace

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

21. Rubber Bed Mat Gooseneck Holes

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

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

    By Shatterz, March 18
    • 7 replies
    • 1k views
    • 
    • Pryme
    • March 27

23. PPE Transmission Pan Install 1 2

    By darleyhavidson, March 15
    • 21 replies
    • 1.7k views
    • 
    • Pryme
    • March 23

24. Rough Country mudflap delete

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

25. Speedometer recalculation for larger tires

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