15016745 Headlight Relay (3 Pack) 12V 4-Pin DRL & Low Beam Relay Replacement for Chevrolet Trailblazer GMC Envoy Buick Rainier Isuzu Ascender, Replaces 601-218 13506836 Multi-Pack

Professional-Grade Lighting Solution for GM SUV OwnersIf your Chevrolet Trailblazer or GMC Envoy suddenly loses its low beam headlights while driving, the culprit is almost certainly the #46 Headlight Relay. The 15016745 relay is a critical component that manages the heavy electrical load of your Daytime Running Lights (DRL) and main headlamps. Over time, high heat and constant cycling cause factory units to degrade, leading to dangerous intermittent failures.Why This is the Smarter Choice:Upgraded Heat Resistance: We’ve reinforced the internal copper windings to better dissipate heat, directly addressing the "overheating" issues common in original 601-218 modules.Precision-Fit Pins: Forget generic relays with "thin pins" that cause poor contact. Our pins are stamped to exact OEM dimensions for a secure, vibration-proof seat in your fuse box.True Plug-and-Play: You don’t need a mechanic. This is a 60-second fix. Locate the fuse box under the hood, find the #46 position (refer to your fuse box lid diagram), pull the old relay, and click the new one in.Common Troubleshooting Symptoms Fixed:High beams work, but low beams are dead.Headlights flicker when driving over bumps.A persistent clicking or buzzing sound from the engine bay.Headlights stay on even after the car is turned off (stuck relay).Pro Maintenance Tip: For GMT360 platform vehicles, keeping a spare relay in your glovebox is highly recommended. These relays work hard every second your engine is running. Having a backup ensures you're never caught in a "no-light" emergency on the road.

• PREMIUM TECHNICAL SPECS: High-performance 12V 4-Pin SPST automotive relays with silver-plated copper contacts for superior conductivity. Expertly replaces 15016745, 13506836, 19116058, and Dorman 601-218. Ideal for managing high-current Low Beam and Daytime Running Light (DRL) circuits.
• VEHICLE ADAPTABILITY: Perfectly compatible with 2002-2009 Chevrolet Trailblazer, 2002-2009 GMC Envoy, 2004-2007 Buick Rainier, and 2003-2008 Isuzu Ascender. Fits the critical #46 relay slot in the engine bay fuse box to govern essential vehicle lighting systems.
• EMERGENCY GLOVEBOX SPARES: Since these relays are high-wear items known to fail due to constant DRL cycling, our 3-pack offers the best value. Install one and keep two as "Roadside Spares" to avoid being stranded in the dark without headlights—a must-have for every GM SUV owner.
• ELIMINATE FAULTY CLICKING: Effectively solves common electrical gremlins such as "clicking" sounds from the fuse box, headlights flickering, or low beams failing while high beams still work. This relay provides the robust current handling needed to keep your lighting system consistent.
• RUGGED & TESTED DESIGN: Engineered with upgraded internal components to combat the vibration and heat-soak issues common in Trailblazer engine bays. Each relay is factory-verified for pull-in voltage, ensuring a snug, vibration-proof fit that won't loosen over time.