I’m experiencing the same issue 86,000 km
- lowered air pressure 32PSI … some change
riding on the Denali 22” rims .. feels like it’s in the right front .. then left ..
spoke with a neighbour with a similar truck and advised me that the rear stock brakes grab and transfer the pulse through the aluminum driveshaft to the front and GM has shown him supporting documentation..
rotating tires today will update post soon
also have read transmission service could help the problem