Modifications & Accessories

1,125 topics in this forum

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

   By Epsilon Plus, December 18, 2023
   • 38 replies
   • 19.2k 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
   • 62.9k views
   • 
   • Out in the Shop
   • December 5, 2025

3. Road Master Active Suspension

   By GAMark, Tuesday at 12:46 PM
   • 8 replies
   • 253 views
   • 
   • GAMark
   • 17 hours ago

4. Denali Grille question

   By Puckgrinder85, May 20
   • 2 replies
   • 342 views
   • 
   • Puckgrinder85
   • Yesterday at 02:52 AM

5. Thoughts on these wheels?

   By onetactical, Thursday at 03:51 PM
   • 7 replies
   • 201 views
   • 
   • Coastie05
   • Yesterday at 12:44 AM

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

   By BDS my HD, June 14
   • 13 replies
   • 365 views
   • 
   • chris21
   • Wednesday at 08:59 PM

7. Detroit Truetrac differential

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

8. Tonneau cover 1 2

   By GAMark, April 4
   • 16 replies
   • 1.4k views
   • 
   • Coastie05
   • June 7

9. Torsion adjustment

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

10. 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
    • 18.5k views
    • 
    • PBNB
    • June 3

11. Accessory install using upfitter switches 2025 3500 L5P

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

12. Always on LED lights up front

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

13. Colored brake calipers on a HD???

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

14. 2022 Sierra elevation refresh passenger seat upgrade

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

15. xm antenna module location

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

16. Trailer TPS Sensor Question Rim Size

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

17. AT4X 2500 Airbag Installation - Great Kit!

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

18. Dialed in for summer

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

19. side view camera

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

20. AT4X OEM Fender Flares fit other trims?

    By EXSlider400, August 22, 2025
    • 8 replies
    • 2.7k views
    • 
    • KTDanforth
    • April 17

21. Zr2 front suspension 1 2 3 4 28

    By Joe97281, December 4, 2023
    • 409 replies
    • 77.4k views
    • 
    • kylant
    • April 3

22. Tow mirror delete and replace

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

23. Rubber Bed Mat Gooseneck Holes

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

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

    By Shatterz, March 18
    • 7 replies
    • 1.1k views
    • 
    • Pryme
    • March 27

25. PPE Transmission Pan Install 1 2

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