Dreaded "Reduced Engine Power" issue - 2000-2014 Silverado Sep 19, 2016I had that issue with my 2011 Chevrolet Silverado back in March 2013 when I had around 50,000 miles on my truck. Since I was out of town 8 hours from home, I limped it to a Chevy dealer. The tech found I had a faulty throttle position sensor. They replace the TPS sensor, reset the idle speed and reprogram the computer, as the invoice stated. 07 chevy silverado wiring | eBay OEM HEADLIGHT WIRING HARNESS 07-13 CHEVY SILVERADO 1500 2500 3500 [2596 2806] (Fits: More than one vehicle) Pre-Owned. $29. Top Rated Plus. Sellers with highest buyer ratings; Throttle Position Sensor W/ Wire 12570800 For GM 03-07 Silverado Sierra 977-000 (Fits: More than one vehicle) Brand New. $32.