Check for a vacuum leak, possibly the EGR valve.
disconnect battery cables and touch them together! I have done this and it worked. I have an 05 2500hd
Below the oil pan. If you do not know you should not touch it.
Pioneer's touch-screen AVIC-X920BT
The 2012 Chevrolet Silverado-1500-Hybrid is 6 ft. 8 in. (80 in.)1 one-touch power windows wide.
The 2013 Chevrolet Silverado-1500-Hybrid is 6 ft. 8 in. (80 in.)1 one-touch power windows wide.
The 2011 Chevrolet Silverado-1500-Hybrid is 6 ft. 8 in. (80 in.)1 one-touch power windows wide.
The 2009 Chevrolet Silverado-1500-Hybrid is 6 ft. 8 in. (80 in.)1 one-touch power windows wide.
The 2010 Chevrolet Silverado-1500-Hybrid is 6 ft. 8 in. (80 in.)1 one-touch power windows wide.
You can't but I wish they was
Off and cool to the touch.
use a search engine - Youtube
third engine saves the day