Join Date: May 2015
Location: Southern California
91 octane and the PC solved my chuggle problems. The 91 octane alone almost cured it. The PC fixed the reluctance to downshift in slow speed situations, most notably long, slow speed left turns at large intersections. During these left turns it used to shift into third and sometimes fourth and then refuse to downshift unless I floored it. Not now.
20015 Colorado LT, Crew Cab, Long Box, Cyber Gray Metallic.