2005 Chevrolet Blazer

2005 CHEVROLET TRAILBLAZER 4WD 1. CHECK ENGINE LIGHT STAYS ON CONSISTENTLY 2. WHEN DRIVING AT NIGHT THE HEADLIGHTS AND INSTRUMENT LIGHTS WILL DIM AND/OR FLASH ON AND OFF. 3. WHEN STOPPED THE VEHICLE WILL SUDDENLY REV WHICH HAS HAPPENED MANY TIMES AND FORTUNATELY I PRESSED THE BRAKE IN TIME OR I WOULD HAVE REAR ENDED SEVERAL VEHICLES. 4A. THE GAUGES ON MY VEHICLE ARE COMPLETELY HAYWIRE. THE SPEEDOMETER WILL AT TIMES NOT MOVE AT ALL OR GO ALL THE WAY PAST 120 MPH, AT OTHER TIMES IT WILL STICK ON WHATEVER SPEED I MIGHT BE GOING AT THE MOMENT AND NOT MOVE. OTHER TIMES IT WILL STICK AT WHATEVER SPEED I WAS GOING AND THEN PROCEED TO MOVE WHICH MAY SHOW I'M GOING 10, 20 30, .... MILES FASTER THAN THE ACTUAL SPEED I'M TRAVELING. 4B. THE OIL GAUGE HAS GONE ALL THE WAY OVER AND NO LONGER MOVES. THESE ARE ALL VERY DANGEROUS INCIDENTS WHICH SHOULD BE RECALLED