Troubleshooting, Warranty & Recalls

911 topics in this forum

1. Key wont shut off

   By Larry Naslund, September 29, 2023
   • 0 replies
   • 644 views
   • 
   • Larry Naslund
   • September 29, 2023

2. 2022 Duramax 2500HD won’t start

   By 22DuramaxHELP, September 24, 2024
   • 0 replies
   • 739 views
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   • 22DuramaxHELP
   • September 24, 2024

3. 2020 2500 & 3500HD Coolant Bypass Line Leak

   By blk04sr, October 11, 2019
   • 0 replies
   • 994 views
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   • blk04sr
   • October 11, 2019

4. Engine knocking on cold start-3200 mile truck

   By Duckhunter18, February 14, 2021
   • 0 replies
   • 416 views
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   • Duckhunter18
   • February 14, 2021

5. Duramax Engine temps while heavy towing

   By rblanch, August 23, 2021
   • 0 replies
   • 921 views
   • 
   • rblanch
   • August 23, 2021

6. Pop/clunk

   By 22 6.6gasser, March 13, 2025
   • 0 replies
   • 630 views
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   • 22 6.6gasser
   • March 13, 2025

7. Outside Temperature Reading High Consistently

   By AT4X Steve, November 7, 2025
   • 0 replies
   • 186 views
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   • AT4X Steve
   • November 7, 2025

8. 3rd light camera replacement

   By DennisW, November 3, 2020
   • 0 replies
   • 559 views
   • 
   • DennisW
   • November 3, 2020

9. 2020 P20C1 Code - DEF Heater Open Circuit

   By Brucegmi1234, February 26, 2021
   • 0 replies
   • 10.5k views
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   • Brucegmi1234
   • February 26, 2021

10. 2023 ZR2 1500 still thinks my trailer is hooked up.

    By Chad5252, January 27, 2024
    • 0 replies
    • 417 views
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    • Chad5252
    • January 27, 2024

11. Abs pump noise

    By Rick o, June 25, 2020
    • 0 replies
    • 2.2k views
    • 
    • Rick o
    • June 25, 2020