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Alan Roehrich · 03-24-2014, 05:59 PM

Ed, the "Big Dooley" as GM calls it tows far better, the bigger the trailer, the bigger the difference.

Kevin has a crew cab 4x4 2500HD with the 8.1 and the Allison. It does not get a bit better mileage than my crew cab 2WD 3500 "Big Dooley" with the 8.1 and the Allison, in fact, mine may do a little better.

03-24-2014, 05:59 PM	#3
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,125 Likes: 1,583 Liked 1,880 Times in 422 Posts	Re: Chevy 3500 single tire vs dually Ed, the "Big Dooley" as GM calls it tows far better, the bigger the trailer, the bigger the difference. Kevin has a crew cab 4x4 2500HD with the 8.1 and the Allison. It does not get a bit better mileage than my crew cab 2WD 3500 "Big Dooley" with the 8.1 and the Allison, in fact, mine may do a little better. __________________ Alan Roehrich 212A G/S