Another Colorado I tuned recently was Pete’s Colorado 7. He arrived with caravan in tow (all 3ton of it) With it unhooked it was on to the dyno for a couple of baseline pull’s before the tuning started.
The car already had a full 3″ exhaust system, So it had a decent starting point. However with the engine ecu & transmission calibration adjusted he & his wife were on their way for another caravaning adventure.
A couple of days later he let me know that on this trip they used half the amount of fuel it normally used for the same route & towing was a breeze.
Another happy Customer.