MY 2017 GMC SIERRA 3500 HAD THE DEF HEATER FAIL AT 20K MILES DEALER REPLACED ONLYT TO HAVE IT FAIL 2 DAYS LATER TRUCK IS BACK AT DEALER FOR 2 WEEKS NOW WITH DEALER UNABLE TO FIX, CHNGED DEF HEATER AND MODULE NOW CLAIM GM ENGINEERING HAS TO FIGURE IT OUT LOST TRUCK FOR PLOWING A BIG STORM, NOT TO MENTION THE MONTHLY PAYMENT CALLING GM CUSTOMER SERVICE IS A TOTAL JOKE- MANNED BY FOREIGNERS AT A CALL CENTER
IVE NEVER BEED SO FRUSTRATED IN MY LIFE. WE OWN SEVERAL OTHER PRE EMISSIONS DURMX TRUCKS- MY ADVICE; STAY AWAY FROM ANYTHING WITH DEF!!!