This new electric push button 4x4 dash mounted switch is a high quality, aftermarket replacement part. If defective, your truck may not shift into 4WD and your shift light may not indicate 4WD when shifted to 4WD. Why search through junk yards hoping to find a used 4x4 switch when you can have it brand new! Replace that defective 4 Wheel Drive switch now. Specifications Replaces dealer part number: 15152504 Three switch dash control (2HI, 4HI & 4Lo) Dash mounted Direct replacement Fits 4 wheel drive trucks that do not have AWD All Wheel Drive Built to strict quality control standards Note: If you have any questions about this fitting your application, please call your local GM dealer with the above part number. This GM electric 4x4 switch has good cost savings over a dealer unit.