When your 2022 Chevrolet Silverado displays the P0305 code, the engine control module has detected repeated misfires in cylinder 5. The 2022 Silverado offers various engine options including the 2.7L turbo-four, 4.3L V6, 5.3L V8, 6.2L V8, and 3.0L Duramax diesel. P0305 is valid on all V6 and V8 configurations but anomalous on the 2.7L four-cylinder.
Confirming Your Engine
Check your window sticker, door jamb label, or RPO codes to determine which engine is installed. The V6 and V8 engines have cylinder 5 (and more), while the 2.7L Turbo is a four-cylinder without cylinder 5.
Cylinder 5 Location on V8/V6
GM positions odd-numbered cylinders on the driver side bank. On V8s, cylinder 5 is at the front of the left bank. On the V6, cylinder 5 is in the center position of the left bank. Access typically requires removing the engine cover and possibly the air intake duct.
Common Issues on 2022 Silverado
Dynamic Fuel Management (DFM) lifter failures have been reported on some GM V8 engines, causing misfires in affected cylinders. Spark plug wear occurs over time, especially with towing. Ignition coil failure can happen individually. Carbon buildup on direct-injected engines affects valve sealing. Fuel injector issues can cause lean misfires.
Diagnostic Steps
Begin by confirming engine type and cylinder 5 location. Read freeze frame data to understand misfire conditions. Inspect the spark plug for wear, fouling, or damage. Test the ignition coil. Check for TSBs related to DFM lifter issues. Monitor oil pressure and lifter operation if AFM/DFM concerns exist.