THE MALFUNCTION LIGHT COMES ON, THE RPMs WENT TO 4000 AND THE SPEED WENT TO 60 KM. WHAT CAN THE PROBLEM BE

What is your question?

THE TRUCK HAS 1427KM ON IT. WE JUST BOUGHT IT A MONTH AGO. THIS THE SECOND TIME THIS HAS HAPPENED. I LOST SPEED ON THE HIGHWAY. COULD THE CRUSE CONTROL CAUSE THIS. THE DIAGNOSTIC REPORT SAYS POWER TRAIN MALFUNCTION. HOW IS THIS FIXED.

How long has your 2017 GMC Sierra 1500 had this problem?

twice in 2 days