📝 ACDelco 18A258 (Gold/Professional) and 18A258A (Silver/Advantage) are the same dimension — Gold is coated. Fits K1500 4WD and C2500 front axle. Confirm rotor diameter (12" vs 11") for your specific application.
⚠️ Verify before buying. Fitment varies by year, engine (4.3/5.0/5.7/7.4/6.5) and 2WD/4WD. Confirm against your VIN/build before ordering.