Modifications & Accessories

1,140 topics in this forum

1. Tow mirror upgrade and issue!

   By ron mexico75, March 11, 2019
   • 5 replies
   • 6.2k views
   • 
   • ron mexico75
   • March 12, 2019

2. Spare tire size difference

   By Icutmetl, March 9, 2019
   • 2 replies
   • 3.2k views
   • 
   • Icutmetl
   • March 9, 2019

3. Headlight bulb swap

   By DBeau, March 7, 2019
   • 0 replies
   • 647 views
   • 
   • DBeau
   • March 7, 2019

4. z71 Shock replacement.

   By 509Dirtymax, March 3, 2019
   • 4 replies
   • 2.4k views
   • 
   • SierraHD17
   • March 7, 2019

5. Help me find backup camera wiring!

   By sasq40, November 7, 2018
   • 1 reply
   • 20.1k views
   • 
   • BigWhiteMastadon
   • March 2, 2019

6. Upgrading unmodified 2015 LML

   By halhawkins, February 17, 2019
   • 1 reply
   • 1.3k views
   • 
   • avalonandl
   • February 28, 2019

7. Factory Trailer Brake Controller

   By Chevyguy4287, February 28, 2019   

   • help
   • 1 reply
   • 820 views
   • 
   • avalonandl
   • February 28, 2019

8. 2019 2500HD Cat-back?

   By Swerve-n-protect, February 25, 2019
   • 3 replies
   • 1.2k views
   • 
   • Swerve-n-protect
   • February 26, 2019

9. 2017 3500HD 6.0 Mild muffler option advice 1 2

   By EZTundra77, January 31, 2019
   • 15 replies
   • 4.8k views
   • 
   • EZTundra77
   • February 25, 2019

10. Bed rails on 3500HD

    By 3500HD_owner, February 23, 2019
    • 0 replies
    • 976 views
    • 
    • 3500HD_owner
    • February 23, 2019

11. 4x4 to AWD conversion

    By atlantaman, February 10, 2019   

    • awd conversion
    • 12 replies
    • 20.1k views
    • 
    • jps4jeep
    • February 21, 2019

12. GTR LED Fog lamp Kit for HD Chevy

    By fjtort2, November 27, 2018
    • 1 reply
    • 3.4k views
    • 
    • chrisb1
    • February 21, 2019

13. Anyone install fog lights in the black fillers to the sides of the trans cooler?

    By rsay3, November 28, 2018
    • 4 replies
    • 1.9k views
    • 
    • joeb11
    • February 16, 2019

14. Program

    By Francis Aldridge, February 15, 2019
    • 2 replies
    • 523 views
    • 
    • avalonandl
    • February 15, 2019

15. Bolt on exhaust tip 2017-2018 Dmax

    By EXSlider400, December 11, 2017   

    • 2500hd
    • 3500hd
    • (and 1 more)

      Tagged with:

      • 2500hd
      • 3500hd
      • 6.6l duramax
    • 13 replies
    • 22.6k views
    • 
    • paauto
    • February 11, 2019

16. Leveling Front and Rear of 2500

    By lilkajun, February 5, 2019
    • 3 replies
    • 978 views
    • 
    • Big Whiskey
    • February 10, 2019

17. Replacing roof Led lights on 2018 Sierra 3500 HD

    By Chuckulnaskit76, February 7, 2019
    • 1 reply
    • 1.5k views
    • 
    • EXSlider400
    • February 8, 2019

18. Black Lugs

    By Bigshu, February 6, 2019
    • 3 replies
    • 1.6k views
    • 
    • Sierra Dan
    • February 6, 2019

19. Air Horns!

    By hurrey, February 5, 2019
    • 3 replies
    • 4.7k views
    • 
    • StinkyCheese
    • February 6, 2019

20. Kleinn Train Horns - Kit GMHD-734, Install and Review on 2017 Denali HD

    By andym22, February 2, 2019   

    • kleinnairhorns tooloudtoobad, gmhd-734
    • 4 replies
    • 4.3k views
    • 
    • j-ten-ner
    • February 2, 2019

21. Those with the RC 3.5" No Cut "Lift" Kit 1 2 3 4

    By CuzznVinny, May 16, 2017
    • 49 replies
    • 31.2k views
    • 
    • Dersch
    • February 1, 2019

22. L5P Hood Scoop Lighting Duramax

    By EXSlider400, January 12, 2019   

    • 2017
    • 2018
    • (and 3 more)

      Tagged with:

      • 2017
      • 2018
      • 2019
      • ram air light
      • led
    • 2 replies
    • 19.1k views
    • 
    • EXSlider400
    • January 31, 2019

23. Re-gear and Detroit Locker in a 2017 2500HD 6 Liter 1 2 3 4 8

    By SierraHD17, December 22, 2017
    • 111 replies
    • 25.1k views
    • 
    • ITS_CLN
    • January 30, 2019

24. GMC wireless charging iPhone 6/7/8 Plus / Samsung Galaxy

    By rmforr2, October 4, 2017   

    • iphone samsung galaxy wireles
    • 14 replies
    • 11k views
    • 
    • CtSeaRay
    • January 23, 2019

25. ISO Denali Interior Trim

    By CoralReef, January 19, 2019
    • 0 replies
    • 1.8k views
    • 
    • CoralReef
    • January 19, 2019