DMF is the worst thing GMC has ever done . before you buy, check out the law suits against GM ? lifter failure the best trucks were 2021 elevation . because of the computer chip shortage DMF were not hooked up
You can override that cylinder deactivation if you’re going to drive around town by putting it in low then on your paddle shifter click it to L9. That keeps it in all the time 8 cylinders , but don’t do it on the highway.
