- About This Product
DescriptionCummins 3947077 replacement serpentine belt for '03-'07 5.9L Dodge Cummins Turbo Diesel trucks with a Jacobs brake and air conditioning.
ReviewsWrite a review
Dec 15, 2016 | By Tarol Ann Alegria
I ordered a serpentine belt. Genos has great prices.
Jul 15, 2017 | By Michael Rossignol
Power steering pump works smoother after replacing belt. Had 127,000 miles on old one.
Serpentine Belt W/ exhaust brake
Nov 1, 2017 | By Joshua Richardson
Geno's has the right belt from Cummins for the 5.6L with a Jacobs exhuast brake. Yes you can order them from a cummins dealer but the price is a little higher plus shipping to them and then to you. I always get my belt from Geno's when I need one.