Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.
Grote · Electrical & Lighting
GRT4003
In stock · ships from Knoxville
This is a 4-inch round amber LED stop, tail, and turn light designed for heavy-duty trucks and trailers.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 1 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Other applications
Other applications
Fits all popular 4-inch grommets and bracket mounts and accepts standard female pin plug-in connectors. No vehicle-specific restrictions.
Part data verified against 5 catalog sources
Different year, make, or config? Get a confirmation against your truck in under a minute.
It uses a high-count diode design to produce a bright, attention-getting signal that helps increase safety by giving drivers behind you more time to react. You would replace an old or broken light with this unit to maintain DOT compliance and visibility. It fits standard 4-inch grommet or bracket mounts and uses a common female pin connector that plugs right into existing trailer and truck wiring harnesses.
Part Number: GRT4003
LED LIGHT, 4 RND AMBER
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside electrical & lighting
