2013 Sierra HD, is a gear change worth it?
Hi everyone, I'm new to this forum and have a question about my 2013 Sierra 2500 HD with a 6.0L and 3.73 gear ratio. It has a tow rating of 9400 lbs and in the manual it says if I had 4.10 it goes...
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Mine has the 4 speed but it pulls my 7400# Rockwood at 65mph in 4th and locks the converter up; 65 mph = 2100 rpm on mine weather in tow/haul or not. yours might be on the verge of shifting to next gear you have to find its sweet sport.. But 3-4000 rpms is not much for these engines they love to run but also love fuel..
