RoadTrip
Member
Just returned from a 2,500 round trip through Montana, Yellowstone, Wyoming and The Badlands. My SLT 5.3 6L80 performed flawlessly through at least four mountain passes rolling foothill roads and countless river valley floors.
I have had the engine tuned with AFM off and the power level warmed up, as well as the transmission tuned and the lower temperature thermostat. Even with this setup, my trans temp did hit 186* in the mountains going up and doing downshift engine braking descending.
The outside temps were between 87 and 94* most days, even in the mountains, which was very surprising.
However, the best news was averaging 22mpg on premium over most of the trip, even considering three adults and the back fully loaded. I had based my gas budget on 15mpg and was very pleased. Sorry about the fuzzy picture.
Although the roads through many of the mountain ranges would have been fun to drive in a low sports car, the average pace of traffic would have caused me to drive about the same as I did in my Yukon.
I have had the engine tuned with AFM off and the power level warmed up, as well as the transmission tuned and the lower temperature thermostat. Even with this setup, my trans temp did hit 186* in the mountains going up and doing downshift engine braking descending.
The outside temps were between 87 and 94* most days, even in the mountains, which was very surprising.
However, the best news was averaging 22mpg on premium over most of the trip, even considering three adults and the back fully loaded. I had based my gas budget on 15mpg and was very pleased. Sorry about the fuzzy picture.
Although the roads through many of the mountain ranges would have been fun to drive in a low sports car, the average pace of traffic would have caused me to drive about the same as I did in my Yukon.
