THE MALFUNCTION LIGHT COMES ON, THE RPMs WENT TO 4000 AND THE SPEED WENT TO 60 KM. WHAT CAN THE PROBLEM BE
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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?
RepairPal Certified shops can diagnose and repair your 2017 GMC Sierra 1500. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
You absolutely need to visit your local GMC truck dealership, as this is all covered under warranty. Let them worry about the cause -- you just get it fixed!