2019-2025 Silverado & Sierra Engine & Transmission (L3B/L82/L84/L87/LM2/LZ0)

1,039 topics in this forum

1. Towing mpg

   By Tim Huey, September 21, 2019   

   • 6000
   • 6500
   • (and 1 more)

     Tagged with:

     • 6000
     • 6500
     • 7000
   • 14 replies
   • 9.2k views
   • 
   • Bobv07662
   • November 6, 2019

3. Gibson Cat-Back 1 2

   By Deetwo428, February 18, 2019   

   • 5.3l exhaust mod
   • gmc at4
   • 16 replies
   • 7.9k views
   • 
   • Flatblack83
   • November 3, 2019

4. 8 speed transmission gear problems

   By Liborio Leon, October 23, 2019
   • 12 replies
   • 1.7k views
   • 
   • MacLaren
   • November 3, 2019

5. 2019 LTZ 4x4 5.3L- Concerning MPG 1 2 3

   By OkStateBass, August 14, 2019
   • 30 replies
   • 4.3k views
   • 
   • MacLaren
   • October 27, 2019

6. Borla S-type catback vs Black Widow Muffler?

   By Philipgonzales3, July 6, 2019
   • 14 replies
   • 11.7k views
   • 
   • Philipgonzales3
   • October 27, 2019

7. 4.3 exhaust help

   By Eddie Contreras, October 16, 2019
   • 2 replies
   • 657 views
   • 
   • UncleDave
   • October 25, 2019

8. Is there a reason these would not work?

   By NCD, October 25, 2019
   • 0 replies
   • 584 views
   • 
   • NCD
   • October 25, 2019

9. Engine block heater, Duramax

   By TripDad, October 24, 2019
   • 1 reply
   • 3k views
   • 
   • davester
   • October 24, 2019

10. AFE y pipe for 5.3 and 6.2

    By blazerk5drew, October 22, 2019
    • 2 replies
    • 2k views
    • 
    • blazerk5drew
    • October 23, 2019

11. MBRP S5065304 Cat Back

    By red454, October 14, 2019
    • 10 replies
    • 3.2k views
    • 
    • Bmon007
    • October 22, 2019

12. 3.0L info

    By redwngr, October 17, 2019
    • 1 reply
    • 3k views
    • 
    • SkiDooNick700
    • October 17, 2019

13. Best Dyno'd CAI 6.2

    By brendon444, September 21, 2019
    • 4 replies
    • 1.6k views
    • 
    • TJay74
    • October 15, 2019

14. Nice gains with GM performance upgrades 1 2

    By Boombastic, April 18, 2019
    • 21 replies
    • 26.9k views
    • 
    • FishinJ
    • October 11, 2019

15. Gibson Cat-Back Exhaust, Awesome

    By truck_newbie, September 16, 2019   

    • gibson
    • exhaust
    • (and 1 more)

      Tagged with:

      • gibson
      • exhaust
      • cat-back
    • 7 replies
    • 5.4k views
    • 
    • FishinJ
    • October 11, 2019

16. Oil Change and 6 Recalls! 1 2

    By DougFL, September 17, 2019   

    • recalls
    • 27 replies
    • 4.7k views
    • 
    • redwngr
    • October 11, 2019

17. Performance

    By Hawker19, September 25, 2019
    • 2 replies
    • 901 views
    • 
    • Hawker19
    • October 8, 2019

18. 6.2 Stock Exhaust Details to modified True Duals with X Pipe

    By rosepaule, September 23, 2019
    • 3 replies
    • 3k views
    • 
    • OnTheReel
    • October 6, 2019

19. DFM is it always on even in L and tow haul mode?

    By RSTJohn, September 18, 2019   

    • RST
    • 8 speed
    • (and 1 more)

      Tagged with:

      • RST
      • 8 speed
      • DFM
    • 4 replies
    • 12.7k views
    • 
    • wizard4878
    • October 5, 2019

20. 2019 TRAIL BOSS Range technology

    By K455, March 13, 2019
    • 10 replies
    • 3.9k views
    • 
    • gennylight13
    • September 29, 2019

21. Brake Pad Life Indicator 1 2

    By SummitBoss, July 31, 2019
    • 16 replies
    • 2.2k views
    • 
    • lebag335
    • September 27, 2019

22. 10 speed vs 8 speed 6.2 L

    By WHITESSTOWPIG, December 19, 2018
    • 11 replies
    • 33.2k views
    • 
    • Billet Bowtie
    • September 21, 2019

23. Brake sounds when stopping

    By GCG, September 20, 2019   

    • 2019 gmc sierra
    • x 31 - new purchase
    • 0 replies
    • 1.6k views
    • 
    • GCG
    • September 20, 2019

24. custom trail boss vs LT drivetrain

    By Blake Thrasher, August 20, 2019
    • 10 replies
    • 3.6k views
    • 
    • tanner709
    • September 17, 2019

25. Flowmaster 1 2 3

    By chiver49, January 12, 2019
    • 34 replies
    • 15k views
    • 
    • frizbal
    • September 17, 2019

26. ATV Hauling with Multi-pro

    By brothernov, September 16, 2019
    • 3 replies
    • 8k views
    • 
    • newdude
    • September 16, 2019