PERFECT FIT - Compatible with Chevrolet Silverado, Tahoe, Trailblazer, Colorado, GMC Sierra and Suburban models. Replaces part numbers 1S5170, 24221125 and more. EFFICIENT PERFORMANCE - Ensures the engine starts only in neutral or park, improving safety. Fault Detection: Replacement alert if vehicle does not start in any gear or if reverse lights are not activated. HIGH QUALITY MATERIALS - Made with durable, corrosion-resistant materials for long-lasting use. EASY INSTALLATION - Designed for simple installation, improving driving safety and comfort.