AZjeff
$50 Site Donor 2023
The Sierra calls for 80 psi in the rear tires. Harsh ride is an understatement at that psi when not towing. I'd like to run 55-60 but get a warning repeatedly on the DIC if the pressure is below 70, so I run 70. Also get email notifications from the My GMC app so OnStar is squealing on me even though I didn't extend past the trial period.
My last 3/4 ton diesel called for 50 front/60 rear.
My last 3/4 ton diesel called for 50 front/60 rear.