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I had a GMC with the 6.0 and 4.10 rear end. Worked ok pulling my 32' Laredo but the hills would kill me. Truck slowed down and rpm's went high when go uphill. Traded it in. Now I have a 40'ft Alpine and a 2016 F350 6.7 diesel. No regrets. Pulls great going over mountains and exhaust brake holds truck well going down hill. Once you experience diesel, nothing will come close
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