Frequently bought together
Description
A six-piece trunnion and hinge set for the tailgate on a 1955–1959 Chevy or GMC pickup. It replaces the zinc-plated originals that rust and get noisy, so the tailgate opens and closes quietly.
Features
- Six-piece stainless steel set that will never rust.
- Trunnions CNC machined from 316 stainless steel and Delrin.
- Hinge plates laser cut from 304 stainless steel.
- Made in the USA.
Choose your option
- Stepside
- Fleetside (1958–59 only)
Fitment notes
The stepside trunnions include only the trunnion bushing, which is used with the stock tailgate bracket.
Truck compatibility and specs
Fits these trucks
1955–1959
Not sure this is the right part for your truck? Send us your year, make and model and we will confirm the fit before you order.
Specifications
- Part number
- 5559TGHK
- Material
- Raw Steel
- Interior / Exterior
- Exterior
- Brand
- LS Fabrication
- Weight
- 0.55 kg
Fits alongside
Most often bought with this part:
Reviews
Customer reviews
What owners are saying
1
Tailgate Trunnion / Hinge Kit - 55-59 GMC Chevy Truck
Common questions
Is trimming or drilling needed?
On the latch kits, yes. Expect to trim the tailgate itself, drill one hole in the tailgate jamb for the supplied rivnut and one in the bedside jamb for the striker mount. Templates are included in the kit and the installation template is also published as a PDF on the product page.
Do I reuse any factory hardware?
On the latch kits the factory latch hardware is still required alongside the additional hardware supplied. Everything else - latches, latch mounts, bed bracket and cable mounts, cables - is in the kit.
Will this fix a gate that will not close square?
A worn latch mechanism is the usual cause and the kit replaces it, but a sagging gate is normally the trunnions or hinges rather than the latch. If the gate drops at one end when it is closed, start with the trunnion and hinge kit for your year.
How do I know it fits my truck?
This part is listed for 1955–1959 Chevy and GMC 3100, 3600, 3800, C10, C20, C30 and others. The full year, make and model list is in the Truck Compatibility tab on this page. If your truck has been modified, or you are between two of the year ranges we list, send us the year, make and model and we will confirm the fit before you order rather than after.
How long before it ships?
It is a stock item and leaves our warehouse in 1-3 business days. Transit after that is typically 2-5 business days in the United States. Larger orders can arrive in more than one box on different days.
What if it is not right for the truck?
You have 30 days from delivery to return it by mail. Return shipping is on you, and the part needs to come back uninstalled and unmodified - once a panel has been trimmed or welded it cannot go back. Made-to-order items are final sale. The full terms are on our returns page.
Still not sure? Contact us before you order.





















These trunnions are the real deal very impressed with the quality.