The P0303 diagnostic trouble code on your 2024 GMC Acadia indicates the powertrain control module has detected a misfire in cylinder 3. The redesigned 2024 Acadia features new engine options requiring updated diagnostic approaches.
2024 Acadia Powertrains
The all-new 2024 Acadia offers a 2.5L turbocharged four-cylinder as standard, with an available 2.4L turbo or 3.6L V6 depending on trim. On the inline-4 engines, cylinder 3 is the third from the front. On the V6, cylinder 3 is on the driver's side bank.
Common Causes
- Ignition Coil Failure: Individual coil-on-plug units can fail
- Spark Plug Issues: Turbocharged engines require specific spark plugs
- Fuel Injector Problems: Direct injection systems can develop issues
- Boost System Leaks: Turbo models are sensitive to intake leaks
- Carbon Buildup: GDI engines accumulate intake valve deposits
Diagnostic Process
Use a GM-compatible scanner to access engine-specific data. Identify your engine type first, as diagnostic procedures differ. Monitor misfire counts and boost pressure data on turbo models. Test ignition components systematically.
Repair Recommendations
Replace failed ignition coils with AC Delco components. Install spark plugs meeting GM specifications. Address boost system leaks on turbo models. For carbon buildup, professional intake cleaning may be necessary.