GVWR: Class 2E: 6,001 - 7,000 lb (2,722 - 3,175 kg)
Make: GMC
Manufacturer: GENERAL MOTORS LLC
Manufacturer Id: 984
Model: Sierra
Model Year: 2006
Plant City: Oshawa Truck
Plant Company Name: NA-Canada Truck
Plant Country: Canada
Plant State: On
Trim: 1500 (1/2 ton)
Valve Train Design: Dual Overhead Cam (DOHC)
Vehicle Type: TRUCK
Model year
COMPONENT
Complaint
2004
ELECTRICAL SYSTEM
I HAVE A PROBLEM WITH MY SPEEDOMETER. EVERY DAY AFTER DRIVING IT FOR 30 +/- MILES THE SPEEDOMETER STOPS. SOMETIMES AT 50 SOMETIMES AT 0 MPH. ONCE I BEGIN TO DRIVE IT WILL SOMETIMES GO FROM 50 TO 100 OR IT WILL STAY WHERE IT STOPPED. THIS STARTED ABOUT 18 MONTHS AGO BUT IT ONLY HAPPENED ONCE EVERY COUPLE MONTHS. NOW IT HAPPENS DAILY. I HAVE LEARNED THAT AFTER LEAVING IT SET FOR A FEW HOURS I START IT UP, PUT IT INTO DRIVE AND TURN IT OFF. WITH THE GEARSHIFT IN DRIVE I TRY STARTING IT AND EACH TIME I TURN THE KEY THE SPEEDOMETER GOES FROM 50 TO 40 TO 30 AND THEN BACK TO 0. ONCE AT ZERO I START THE TRUCK AND THE SPEEDOMETER WILL BE ACCURATE FOR AT LEAST 30+/- MILES. *TR
2006
ELECTRICAL SYSTEM
LOSS OF FAN - BLOWER MOTOR (HVAC) HIGH SPEED OPERATION FAILURE. WITH LOSS OF HIGH SPEED FAN, OTHER FAN SPEEDS (LOWER) OPERATION BECAME INTERMITTENT, WORKS AFTER JIGGLING BLOWER MOTOR WIRE BUNDLE AT CONNECTION POINT ON BLOWER MOTOR RESISTOR. VISUAL INSPECTION SHOWS MELTED WIRE HARNESS CONNECTOR AT BLOWER MOTOR RESISTOR, UNABLE TO SEPARATE (REMOVE) THE CONNECTOR. SEARCHED NHTSA ODI DATABASE AND FOUND THREE VERY RELATED DEFECT COMPLAINTS - INOP FAN, SMOKE AND MELTED WIRES, FAN LOSS. FAN FAILURE COULD LEAD TO FIRE FROM MELTED ELECTRICAL CONNECTIONS, LOSS OF VISIBILITY DUE TO WINDSHIELD ICING IN WINTER, FOGGING OVER WHEN DRIVING IN CHANGING WEATHER. WINDSHIELD DEFROSTER REQUIRES OPERATIVE FAN AND DEFROSTER IS A REQUIRED SAFETY ITEM. DEALER REPLACED BLOWER MOTOR ELECTRICAL CONNECTOR, WIRE HARNESS, AND FUSE, CHARGING PARTS TO WARRANTY AND ME FOR THE LABOR. THIS APPEARS TO BE A VERY COMMON DEFECT IN THIS PRODUCT LINE. THERE IS A TECHNICAL SERVICE BULLETIN FOR THE REPAIR INCLUDING REPLACEMENT OF THE CONNECTION WIRING TO INSURE ANY MELTED INSULATION IS REMOVED. THIS SHOULD BE A SAFETY RECALL. DEALER HAS OLD PARTS. *TR