Flash: A/C and Drivability Improvements
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software.
Customers may experience any or all of the following symptoms/conditions:
A noticeable reduction in A/C performance during hard accelerations.
25 - 50 RPM engine instability at idle.
Hesitation in reverse at low speeds.
Performance derate at high altitude (greater than 6,000 feet) or in temperatures above 90°F. (32°C.).
A/C engagement Bump while accelerating at temperatures above 90°F. (32°C.).
Surge during accelerating.
Buck/bobble after shifting the transmission and/or accelerator pedal tip in/tip out.Updating the software will correct the conditions listed above.
