JWEELY LED Flasher Relay LM487 for Chevy & GMC 2003-2006 — 10‑Pin Direct-Fit, Stops Hyper-Flash

JWEELY LM487 is a 10-pin LED-compatible flasher relay designed to replace factory units and stop hyper-flashing or no-turn-signal issues on select 2003–2006 Chevrolet, GMC and Cadillac trucks and SUVs.

If your Silverado, Sierra, Yukon or Escalade from the 2003–2006 model years shows rapid blink rates, inconsistent turn signals, or no signal at all after upgrading to LED bulbs, this LM487 flasher relay is a direct-fit remedy. Built to match original-equipment fit and function, it swaps into the vehicle’s flasher slot and restores correct blink timing without adding resistors. The relay is manufactured with durable PP plastic and meets OEM-level specifications for reliable performance in typical automotive environments.

What vehicles and part numbers does this relay replace?

This JWEELY module is made to substitute specific OE relays and fits many GM full-size trucks and SUVs from 2003–2006. It lists common replacement numbers so you can confirm compatibility before purchase.

Compatible details:

• Replaces OE numbers LM487, 10383321, 15231201, 15764135 for direct fit.
• Designed for Chevrolet models: Avalanche, Silverado (1500/2500/3500 and HD variants), Suburban and Tahoe from 2003–2006.
• Works with GMC and Cadillac applications: Sierra, Yukon, Yukon XL, Escalade, and H2 model years shown in the compatibility list.
• Fits both standard and heavy‑duty model variants where the vehicle uses a 10-pin flasher module.

How does the LM487 fix LED-related hyper-flash or no-signal problems?

LED bulbs draw much less current than incandescent lamps, which can cause the vehicle’s flasher circuit to interpret the lower load as a burned-out bulb and speed up the flash rate or stop signaling. The LM487 is engineered to provide the correct timing and electrical behavior for LED loads without installing load resistors.

• Provides correct blink timing for low-current LED turn lamps.
• Eliminates the need for inline resistors in most LED retrofits.
• Restores normal turn-signal operation and avoids rapid flashing alerts.
• Direct replacement — plug-and-play installation in compatible vehicles.

How simple is installation and what should I check before swapping the relay?

Installation is straightforward for anyone comfortable accessing the fuse/relay panel or the specific flasher socket location in the dash. Before replacing the relay, verify your vehicle’s flasher uses the same 10-pin configuration and match OE numbers to avoid misfit.

• Locate the factory flasher in the dash or fuse box per vehicle manual.
• Confirm the 10-pin connector and matching OE part number before removal.
• Pull the old relay straight out and press the new LM487 into the same socket.
• Test turn signals and hazard lights immediately after installation.

What materials and durability features does this relay offer?

The housing is molded from premium polypropylene to resist heat and vibration common in engine bays and under-dash compartments. JWEELY engineers the LM487 to meet or exceed OEM durability and electrical performance criteria so it performs reliably over time.

• Robust PP plastic housing for thermal and mechanical durability.
• 10-pin connector designed for secure electrical contact.
• Manufactured to meet OEM-style specifications for fit and function.
• Intended for long-term use in automotive electrical systems.

Who is this for: The JWEELY LM487 is intended for owners, mechanics and shops upgrading turn signals to LED or restoring proper signal function on compatible 2003–2006 Chevrolet, GMC and Cadillac trucks and SUVs. If your vehicle shows hyper-flash, intermittent signaling, or uses one of the listed OE part numbers, this relay is a practical plug-and-play replacement to return your vehicle’s indicators to normal operation.