Factory Bulb Repl.

FeaturesModern LED appearance with instant on and off.Compatible with GMC Sierra 2500/3500 front turn signal bulbs.Plug and play no modification with factory 3157 bulb size.Multiple brightness levels available.OverviewLED Indicators. The factory incandescent turn signals on your vehicle illuminate in a slow glow taking a moment to turn off and on. With replacement LED bulbs you can immediately update your vehicle with the instant on-off blinking of modern LEDs. This instant activation adds a modern and distinct look to your vehicle.Brightness. Your vehicle uses a 3157 dual-filament bulb. They light up with low power as parking lights then they get brighter when the turn signal or hazards are activated. Diode Dynamics bulbs are designed to match the factory brightness ratio so there is enough distinction between low and high brightness levels. As with all Diode Dynamics LED bulbs these turn signal bulbs are rated with accurate measured lumen figures not calculations or guesses.Switchback. These bulbs illuminate in a bright white for the low power setting for your running/parking light then switch to intense amber when the turn signals are activated. When the turn signal is switched off they return to the original white output. Please note: in order to properly see the white you must have clear reflectors/lenses over the turn signal bulb.Reduced Load. If you experience hyperblinking the most tried-and-true method to correct this is to add resistors (sold separately). Since a 6-ohm resistor uses about the same power as a standard turn signal bulb these can be used on any vehicle but does require tapping factory signals. One resistor is needed to replace each turn signal bulb.

Additional Information

LED Indicators. The factory incandescent turn signals on your vehicle illuminate in a slow glow taking a moment to turn off and on.

Part Type

Multi-Purpose Light Bulb

• Direct replacement for your factory bulb
• Increased output with LED Appearance
• Molded construction with sturdy double terminals
• Plug and play simple installation

Note for Australian & European Markets

This product is designed and tested for the US domestic market, and certain features may not be compatible with or compliant to regulations in other countries. For example, some lighting products may need modification to meet transportation standards or may not comply with local laws. References to SAE and DOT refer to US standards & requirements and may not be directly comparable to Australian requirements. For vehicles outside North America, lights may require modification by an auto electrician. Wiring, lamp colour, beam pattern, connectors, or relays may differ from those used in some North American models. Please review all images and descriptions carefully to ensure this product suits your requirements. Returns are not accepted for special-order products.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Details

Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

Light Bulbs, HP24 Switchback, 3157 Bulb Style, LED, Cool White, 6000K Color Temperature, Each

Diode Dynamics HP24 switchback LED bulbs are direct replacement upgrades that add cool white running lights, along with amber emitters to your turn signals. Populated with 16 amber chips and 8 white chips, these bulbs light up white when your headlights are turned on, and flash amber when the turn signals are activated. Housed in an aluminum casing with textured finish for maximum heatsinking properties, they'll last for years. Simply remove your factory bulbs and the HP24s will fit snugly in the sockets. Add switchback functionality and a modern appearance to your front turn signals with a pair of Diode Dynamics HP24 switchback dual-color turn signal LED bulbs.

Features and specs:
• Some amber-only factory setups use half-power for headlights "on" and full power for turn signal activation; these light up in 6,000K cool white color for headlights "on" and flash amber for turn signal activation before switching back to white
• Compatible with any dual-filament 7443-size front turn signal bulb with a clear reflector lens (Diode Dynamics Hyperblink Fix—resistors or flasher—may be required)
• 410 lumens brightness (nearly double the factory output)
• Constant-current circuitry and transient suppression for no flickering/failure reliability
• No yellow appearance when switched off
• Fully aluminum construction
• High-power Samsung LEDs arranged around bulb
• Non-polar and CK compatible
• Simple plug-and-play installation
• Omnidirectional (270 degrees)
• 6.48 watts of power consumption
• 9 to 16 V (typical draw of 0.491 amps at 13.2 V)
• -40 to 185 degrees F (-40 to 85 degrees C) operating temperature