18267 - Service Update - Certain vehicles equipped with RPO LT5 (6.2L SUPERCHARGED V8), a fuel injector may be commanded on for 7.5 seconds when exiting deceleration fuel cutoff, causing the engine to misfire. If this misfire condition were to happen, flames could potentially exit the exhaust and may damage the rear fascia and ZR1 badge. Reprogram the engine control module. (ECM)
