The manual indicated that we should wait during the break in period for engine & transmission (over 1000 miles) which we just hit on our last trip from Cincinnati OH to Evansville IN. Not major hills but we decide to kick it out of cruise on a hill climb when RPM are at 4K to maintain 65 MPH. 55-60 is what we notice at 3k RPM. Had 5star on our '06 georgetown which had the 20 valve v-10 with the 4100 transmission.
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