For 4.3L V6 and 5.3L V8 engines ONLY.
For Chevrolet: for Cheyenne 2014-2018 for Silverado 1500/2500 2014-2018 for Chevrolet Suburban/Tahoe 2015-2018
For GMC: for Sierra 1500 2014-2018 for Yukon/Yukon XL 2015-2018