M.Douglas

2026 HD2500 ZRT Gasser with same noise. Have been loyal to GM but this will be the last if they can’t fix it. Sounds like a toy drill motor in the dash at lower RPMs (<40 mph) until other noise drowns it out. Cannot hear it outside. Taking mine to dealer next month with only 700 miles on it. Let me know if anyone else has found a corrective action. Thanks.