Chevrolet Silverado 2500 HD fuel injector failure causing excessive exhaust smoke and starting issues on Chevrolet Silverado 2500 HD

Some Chevrolet Silverado 2500 HD owners report experiencing fuel injector failure, which can lead to excessive exhaust smoke and starting problems. Symptoms of this issue may include engine codes such as P0204, P020D, and P0300, along with the vehicle entering limp mode and various warning lights activating. Owners of early model years, particularly 2001 to 2004 with the LB7 Duramax engine, have noted a history of fuel injector failures due to cracking and leaking seals. Common complaints also include fuel level sensor failure, erratic speedometer readings, and multiple injector failures, all of which can reduce fuel mileage, cause engine misfires, and lead to clogged or unresponsive injectors. The cost of replacing a fuel injector can range from $200 to $600 each, excluding labor, and GM has issued service updates for the 2021 models to address faulty injectors by reprogramming the engine control module. If excessive exhaust smoke and starting issues are present, it is recommended that owners have their fuel injectors inspected and potentially replaced to resolve these concerns.