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

The JWEELY LM487 LED flasher relay restores correct turn-signal timing and resolves hyper-flash or non‑functioning indicators on compatible 2003–2006 GM trucks and SUVs.

If your Silverado, Sierra, Yukon or Avalanche from the 2003–2006 model years started hyper‑flashing, stopped signaling, or behaves oddly after switching to LED bulbs, this direct-fit replacement flasher relay is built to match the OE electrical behavior. Designed to replace LM487 and related OEM part numbers (10383321, 15231201, 15764135), the unit is a 10‑pin plug‑in module constructed with durable PP housing, meeting or exceeding factory specifications while restoring reliable turn signal performance without adding resistors.

How will this relay stop my turn signals from hyper‑flashing?

The LM487 is engineered to mimic the original flasher module’s timing and load detection so the vehicle’s circuit senses the proper resistance even when low‑draw LED bulbs are used. By replacing a worn or incompatible relay with this unit, the flasher returns to normal cadence instead of rapid flashes.

• Direct replacement for LM487, 10383321, 15231201 and 15764135.
• 10‑pin configuration matches factory connector for plug‑and‑play install.
• No external load resistors required for LED conversions in supported models.
• Restores correct flash rate and indicator behavior.

Which vehicles and years is this module compatible with?

This JWEELY relay covers a wide range of GM pickups and SUVs from 2003 through 2006 and selected 2007 H2 entries, matching the electrical harness and mounting style of the originals. Check your vehicle’s OEM part number to confirm fitment before purchasing.

• Chevy: Silverado (1500, 1500 HD, 2500, 2500 HD, 3500), Avalanche 1500/2500, Tahoe, Suburban (1500/2500) 2003–2006.
• GMC: Sierra 1500/2500/3500, Sierra HD, Yukon/Yukon XL, 2003–2006 models.
• Cadillac & Hummer: Escalade 2003–2006, H2 2003–2007 compatibility noted.
• OEM cross references included for quick verification.

What materials, quality checks, and durability can I expect?

JWEELY builds the LM487 replacement from high‑quality polypropylene housing and rated internal contacts to withstand under‑dash and engine‑bay conditions common to trucks and SUVs. The relay is designed to resist vibration and temperature swings typical in daily driving and towing environments.

• Premium PP plastic housing for impact and heat resistance.
• Electrical characteristics engineered to meet OEM specs.
• Sealed connector interface to reduce corrosion risk.
• Manufactured for long service life in harsh automotive settings.

How do I install the LM487 relay and what should I check first?

Installation is straightforward: locate the factory flasher module in the dash or fuse panel, unplug the old 10‑pin unit, and insert the JWEELY LM487 in the same orientation. Before installation, verify the OEM part number and turn off the vehicle’s electrical system to avoid shorting circuits.

• Turn ignition off and remove keys before replacing the relay.
• Confirm OEM part number (LM487, 10383321, 15231201, 15764135) for correct fit.
• Plug the 10‑pin connector fully until it seats; test turn signals immediately.
• If LED bulbs were installed, no extra load resistor should be necessary for supported models.

Who is this for: The JWEELY LM487 LED flasher relay is aimed at DIYers, mechanics, and fleet operators who own compatible 2003–2006 Chevrolet, GMC, Cadillac, or Hummer vehicles and need a reliable, OEM‑style fix for hyper‑flashing or dead turn signals after converting to LED lighting or replacing a failing factory module. It’s also suitable for restorations and maintenance where original part numbers are specified and a plug‑and‑play solution is preferred.