Has anyone had this problem! I have a 2012 4.3L v6 chevy silverado single cab 4L60e. I was driving thru town and out of no where I hit my gas pedal and it revs in drive. I only have reverse gear right now. Check engine light is on for code p2771 a 4WD low switch circuit. Any advice and help tips to get my truck fixed. Or could it be solenoids bad? FUILD IS NOT BURNT AND IS RED COLORED. SHIFT LINKAGE IS NOT BROKEN