<p>Includes: - Ignition Switch</p> <p>Fits Models: - GMC Sierra 1500 HD</p> <p>Model Years: - 2003</p> <p>Submodels: - Common trims include SL, SLE, SLT; body style is Crew Cab, Regular Cab, and Extended Cab; chassis code is GMT800.</p> <p>Engine Options: - Common engine sizes include 4.8L V8 (VIN N), 5.3L V8 (VIN M, Z), and 6.0L V8 (VIN U).</p> <p>Description: This ignition switch is designed specifically for the 2003 GMC Sierra 1500 HD, ensuring reliable performance and compatibility. It is an essential component for starting your vehicle and maintaining electrical connections.</p> <p>Features: - Direct replacement for factory ignition switch - Ensures proper electrical function - Durable construction for long-lasting use - Easy installation with no modifications required</p> <p>Part Numbers: - 12450251 - ALX-PAU-RB-924-715-CLA13</p>