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
GRT66910
In stock · ships from Knoxville
This is a 6-inch pigtail for connecting Grote’s 4680, 4684, 4686, and 4687 series stop/tail/turn lamps on 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
These lamp series are widely used on heavy-duty trucks and trailers. The pigtail is not a universal fit; it mates only with the Turtleback II connector on those specific lamps.
Part data verified against 2 catalog sources
Different year, make, or config? Get a confirmation against your truck in under a minute.
One end features the Turtleback II double-seal connector that plugs directly into the lamp, while the other end has slim-line .180 male bullet connectors and a ring terminal for chassis ground. It uses 14-gauge GPT wire and is molded to work with the ULTRA-BLUE-SEAL trailer wiring system. You typically replace it when the original pigtail is corroded, damaged, or when upgrading to a new lamp assembly.
Part Number: GRT66910
PIGTAIL
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside electrical & lighting
