NHTSA Complaint #10181861 — 2004 GMC SIERRA 1500

I HAVE A 2004 GMC SIERRA EXT. CAB TRUCK WITH ABOUT 70K MILES ON IT. IN THE PAST WEEK, THE SPEEDOMETER STARTED READING HIGHER THAN 120 MPH WHILE DRIVING. I WAS ONLY DOING AROUND 50 MPH. WHEN STOPPED IT READS AROUND 60 MPH. I CAN START AND TURN OFF THE ENGINE SEVERAL TIMES AND THE SPEEDOMETER NEEDLE WILL DROP AROUND 10 MPH EACH TIME IT STARTS. WHEN IT GETS TO 0, IT WILL READ FINE FOR A LITTLE WHILE AND THEN GRADUALLY START CLIMBING UP PAST 120 MPH AGAIN. 2ND COMPLAINT. AROUND EVERY 20K TO 25K MILES, I HAVE TO TAKE THE TRUCK TO THE DEALER AND HAVE A NEW STEERING COLUMN GREASE PACKING KIT INSTALLED BECAUSE THE STEERING COLUMN STARTS KNOCKING IN THE ENGINE COMPARTMENT. THE FIRST 2 TIMES IT WAS DONE WAS UNDER WARRANTY, NOW THE WARRANTY IS UP AND IT NEEDS ANOTHER PACKING DONE. THE DEALER WANTS ME TO PAY FOR THIS ONE. THIS HAS BEEN AN ONGOING PROBLEM SINCE I BOUGHT THE TRUCK BRAND NEW. *JB