Gates Serpentine Belt For 2011-2013 Peterbilt 587 12.9L -6 DIESEL

2011 Peterbilt 587 Engine: 12.9L -6 DIESEL; Position: Air Conditioning;. 2012 Peterbilt 587 Engine: 12.9L -6 DIESEL; Position: Alternator and Air Conditioning;. 2013 Peterbilt 587 Engine: 12.9L -6 DIESEL; Position: Alternator and Air Conditioning;.