My ’02 3500 CC was great, with no problems to just under 100k except an oil leak near the firewall but my ’05 3500 CC IS a significantly stronger puller. A couple miles less per gallon while pulling hurts a bit but, if I keep my foot out of it, set the cruise at 2100rpm’s, I’m only 2/10’s less in mileage than the ’02 when empty. Strange thing though, I found that if I put about 2k lbs in the back, my mileage INCREASES about 2mpg. Staying in the ’05 for a while, don’t want any part of the DPF.
2005 Chev Duramax/Allison 3500LS DRW Crew Cab, Ride-Rites, Sulastics
B&W 30K-Turnover GN, Putnam 15K-Class-5, A/T Revos, LMM mouthpiece
2006 Chev 6.0L/4L80e 3500WT DRW Ex-Cab 8'Flat-GN, Ride-Rites, Sulastics
A/T Revos