Looking For Replacement Tail Light For 2021 Grand Design 278bh
Updated 05/11/2026 | Published 05/06/2026
Question:
I have a 2021 Grand Design 278bh, i have a taillight that is out and need to replace it. I cant find the right taillight can you point me in the right direction? Thanks, Justin Miller
asked by: Justin M
Expert Reply:
Hey Justin, thanks for reaching out. We should have a tail light replacement for you, but those lights aren't make and model specific, so there isn't a way to look up your camper to know exactly which light it uses. I can still point you in the right direction though.
Looking at pictures of the 2021 Grand Design 278bh online, the rear tail lights appear to be oval surface mount lights which is something we carry. I'd just want to make sure we match up the size and mounting style.
For example, they look a bit like the GloLight LED Trailer Light # STL178RB. This is an oval surface mount light. Overall the light face measures 6-7/16" wide x 2-5/16" tall x 15/16" thick. With the grommet it is 7-1/2" wide x 3-5/16" tall x 1-1/8" thick overall. The mounting holes are 7" apart horizontally and 2-11/16" vertically.
Your best bet will be to compare this to the current light and see if it matches up. If not, feel free to shoot me the dimensions of your light, or even email me a few pictures and I'm happy to look into it and see if we have a match. My email is [email protected] if you want to send those over.
(click to enlarge)
Michael K.
5/9/2026
The light was for my boat trailer. It was easy to install and works just fine.
Jesse M.
5/11/2026
Barry
5/9/2026
Exact fit on the exact part number. Perfect communication by the seller and lightning fast shipping. I will reach out again next time I need a trailer part.
Product Page this Question was Asked From
GloLight LED Trailer Light w/ Flange - Brake, Tail, Turn - Submersible - Surface Mount - Oval - Red
- Trailer Lights
- Tail Lights
- Brake/Tail/Turn
- Oval
- Surface Mount
- Submersible Lights
- LED Light
- 7-1/2L x 3-5/16W Inch
- Red
- Optronics
more information >
Continue Researching
- Shop: RV Designer 90-Degree Entry Door Holder - Plastic - Black
- Shop: GloLight LED Trailer Light w/ Flange - Brake, Tail, Turn - Submersible - Surface Mount - Oval - Red
- Shop: Optronics LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 10 Diode - Oval - Red Lens
- Shop: RV Exterior Lighting
- Shop: Optronics LED Trailer Light w/ Flange - Brake, Turn, Tail - Submersible - Surface Mount - Oval - Red
- Shop: Optronics LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 10 Diode - Oval - Red Lens
- Shop: GloLight Halo LED Trailer Light w/ Flange - Brake, Tail, Turn - Submersible - Oval - Red
- Shop: Fifth Wheel Hitch
- Shop: Optronics LED Trailer Tail Light - Stop, Turn, Tail - 6" Oval - Red
- Q&A: Replacement Converter Charger for WFCO 55 Amp WF-9855
- Article: Trailer Wiring Diagrams
- Search Results: trailer hitch
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Shop: Trailer Hitch
- Shop: Trailer Wiring
- Search Results: trailer tires and wheels
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Video: Firestone Ride-Rite Air Bags with Easy Mount Compressor Feature Breakdown
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Video: B&W Companion OEM 5th Wheel Hitch Manufacturer Breakdown
- Article: How to Measure for Trailer Hitch Drop
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Search Results: trailer wiring
- Shop: Suspension Enhancement
- Shop: Brake Controller
- Search Results: trailer jack
- Article: How to Measure Your Trailer Wheel Bolt Pattern
- Q&A: Installation Time for Blue Ox BX1128 Flat Tow Base Plate Kit for 2016 Jeep Grand Cherokee
- Q&A: Does etrailer Carry Furrion Chill Cube w/ Heat Pump to Replace Dometic Duo-Therm
- Shop: Gooseneck Hitch
on Trailer Lights
Justin M.
5/8/2026
That is the exact light!!!! I just submitted an order. Thanks a bunch!!!!!