Recall #N212354170 2020 GMC Sierra Diesel

[robinl98501]

Since the recall fix, which consisted of re-programing the Diesel Particulate Filter (DPF), my average MPG has dropped 3-4 mpg. This is over the same roads, same speeds, and using cruise control. Dealer of course says "No, we haven't had any reports of that." Anybody else?

 

[lola]

Same thing happened to me. Same answer from my dealer