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Modifications & Accessories

Bumper replacements, 5th wheel hitches, auxiliary lighting, and suspension upgrades for your workhorse.

1,128 topics in this forum

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

    By Epsilon Plus,
    • 60 replies
    • 63.3k views

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

    By Epsilon Plus,
    • 38 replies
    • 19.5k views

  3. Let's install the "upfitter switches" 1 2 3 4 16

    By blamkin86,
    • 233 replies
    • 304.3k views

  4. What have u done to your 2020 hd 1 2 3 4 39

    By mkeddie,
    • 578 replies
    • 300.7k views

  5. Changing from halogen to LED headlights on LT, Custom, or WT trims 1 2 3 4 6

    By SkidooSteve12,   
    • 87 replies
    • 146.9k views

  6. Leveling kits? If so, let's see them. 1 2 3 4 13

    By inquenciocha,
    • 186 replies
    • 141.8k views

  7. Anyone know part number for trailer camera that plugs into ports on rear bumper? 1 2 3 4 10

    By Sunshine39,
    • 144 replies
    • 131.2k views

  8. OEM Paint Matched Fender Flares 1 2 3 4 8

    By ApertureX,
    • 112 replies
    • 114.2k views

  9. Help W/ relocating camera port from bumper to bed for 5th wheel, 1 2 3 4 8

    By 2020_3500HD_High_Country,
    • 106 replies
    • 104.2k views

  10. 35x12.50-20 on stock rims - pics inside 1 2

    By AT4 HD Ron,
    • 19 replies
    • 96k views

  11. High Country Grill 1 2 3 4

    By texasnavy05,
    • 45 replies
    • 92.8k views

  12. Install a 2nd battery 1 2 3 4

    By Ed Rose,   
    • 54 replies
    • 86.4k views

  13. Stereo Mods - Adding an amp and harness 1 2 3

    By MesaRat,   
    • 44 replies
    • 81.2k views

  14. 18s on 35s or 37? 1 2 3

    By bryant87,
    • 30 replies
    • 81.1k views

  15. Zr2 front suspension 1 2 3 4 28

    By Joe97281,
    • 409 replies
    • 78.2k views

  16. 2020 2500HD tire sizing 1 2 3 4

    By Vapor Trail,
    • 56 replies
    • 78.1k views

  17. Trailer Tire Pressure Monitoring System (TTPMS) 1 2 3 4 5

    By KC10Chief,
    • 71 replies
    • 77.1k views

  18. Will 37s fit on a 2500HD without a lift? 1 2

    By Dhami79,
    • 17 replies
    • 75.6k views

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

    By hotairgypsy,
    • 42 replies
    • 72.1k views

  20. What 5W-30 oil brand are you using for the 6.6L gas? 1 2 3 4 15

    By SoCal Angler,
    • 220 replies
    • 64.8k views

  21. Heads Up Display (HUD) 1 2

    By mikemueller,
    • 23 replies
    • 59.7k views

  22. Tire size! 1 2

    By ahartzell2020,
    • 17 replies
    • 57.1k views

  23. 2021 Sierra HD 110v power outlet 1 2

    By Mike LaRocque,
    • 21 replies
    • 53.5k views

  24. 6.6L L8T Gas Exhaust Options - MBRP, Borla... 1 2 3 4

    By powderMonkey,
    • 57 replies
    • 53.1k views

  25. Leer or A.R.E. Truck Cap on 2024 Sierra HD with Fairing on some models 1 2

    By Swamp rat,   
    • 17 replies
    • 53k views
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