2019-2026 GMC Sierra Vertical Door Conversion Kit
Vertical Doors, Inc. part number VDCGMCSIER19 is the vehicle-specific Lambo Door Conversion Kit for the newer-generation GMC Sierra pickup truck. Approved applications include the 2019-2026 GMC Sierra 1500 and 2020-2026 GMC Sierra 2500HD and 3500HD.
The system retains your Sierra's original front doors while changing how they open. Each converted door opens outward first, then raises vertically with gas shock assistance.
Important: This kit is intended for the approved GMC Sierra T1XX light-duty and T1HD heavy-duty applications. The 2019 Sierra 2500HD and 3500HD belong to the previous K2XX generation and require a different kit.
Real Support Before, During and After Installation
When you purchase a genuine Vertical Doors, Inc. kit, you're buying directly from the manufacturer behind the hinge system.
Our team can help confirm your Sierra's application before ordering, answer installation and adjustment questions during the conversion, and assist with door operation or replacement components after installation.
Whether you're installing the kit yourself or working with a professional customization shop, correct fitment and final door alignment are important to getting the system operating properly.
Call 951-245-8669 or contact Vertical Doors, Inc. for fitment, sales, and technical assistance.
GMC Sierra Lambo Doors for the Newer Generation
The newer-generation GMC Sierra has a strong front-end design, prominent body lines, and full-size truck proportions that work well with a custom build. From a lowered Sierra 1500 on aftermarket wheels to a lifted AT4 or customized Sierra Denali, there are plenty of ways owners make these trucks their own.
A genuine Vertical Doors, Inc. conversion adds another mechanical and visual detail to that setup. Instead of replacing the factory front doors, the system changes their movement using vehicle-specific hinge assemblies and gas shocks.
At a truck show, weekend meet, photo shoot, or regular stop, open the front doors outward and raise them vertically to display the conversion.
The finished appearance matters when the doors are closed, too. Proper hinge positioning, even door gaps, latch engagement, wiring clearance, and surrounding body-panel alignment are all important parts of the installation.
Part number VDCGMCSIER19 is designed for approved Sierra applications rather than being a universal hinge conversion.
GMC Sierra Vehicle Fitment
The following GMC Sierra applications are approved for Vertical Doors, Inc. part number VDCGMCSIER19.
| Model | Model Years | Fitment |
|---|---|---|
| GMC Sierra 1500, T1XX new body | 2019-2026 |
Compatible VDCGMCSIER19 |
| GMC Sierra 2500HD, T1HD | 2020-2026 |
Compatible VDCGMCSIER19 |
| GMC Sierra 3500HD, T1HD | 2020-2026 |
Compatible VDCGMCSIER19 |
- 2019 GMC Sierra 1500, redesigned new body: T1XX generation. Included in this approved application.
- 2019 GMC Sierra 1500 Limited: Previous-generation K2XX carryover. Not included in the approved VDCGMCSIER19 application. Contact VDI to confirm the correct kit.
- 2019 GMC Sierra 2500HD / 3500HD: Previous-generation K2XX trucks. Use the earlier VDCGMCSIER14 application.
- 2020 GMC Sierra 2500HD / 3500HD: Redesigned T1HD heavy-duty generation. Included in this approved application.
- GMC Sierra 3500HD chassis-cab and specialty body configurations: Confirm the exact application with VDI before ordering.
Sierra Trims, Packages and Cab Configurations
The Sierra lineup includes trim and equipment designations such as Pro, SLE, Elevation, SLT, AT4, Denali, AT4X, and Denali Ultimate, depending on the year and model.
Regular Cab, Double Cab, and Crew Cab configurations are offered across different Sierra duty series. Engine, drivetrain, suspension package, trim, and equipment availability also vary.
These names help identify your truck, but a trim badge or package name alone does not confirm exact hinge-kit compatibility.
For example, a 2025 Sierra 1500 Denali and a 2025 Sierra 3500HD Denali belong to different duty series, even though both use the Sierra name and Denali trim designation.
Product Details
| Manufacturer | Vertical Doors, Inc. |
|---|---|
| Part Number / SKU | VDCGMCSIER19 |
| Product Type | Vertical Door Conversion Kit |
| Vehicle | GMC Sierra |
| Sierra 1500 Platform | GM T1XX |
| Sierra HD Platform | GM T1HD |
| Sierra 1500 Years | 2019-2026, redesigned new body |
| Sierra 2500HD / 3500HD Years | 2020-2026 |
| Door Movement | Opens outward first, then raises vertically |
| Original Front Doors | Retained |
| Manufacturing | Made in the USA |
Why Choose a Genuine Vertical Doors, Inc. Kit?
Vertical Doors, Inc. has more than 20 years of experience manufacturing vehicle-specific Lambo door conversion systems for cars, trucks, and SUVs.
- Vehicle-specific hinge system for approved GMC Sierra applications
- Designed around the vehicle's factory hinge mounting area
- Original factory front door shells retained
- Traditional outward-then-upward vertical door movement
- Gas shock assisted lifting movement
- Made in the USA
- Hardened steel construction and heat-treated pivot components
- Limited lifetime hinge warranty and six-month gas shock warranty, subject to applicable terms
- Fitment, installation, adjustment, and technical support from the manufacturer
What Comes With the Kit?
The GMC Sierra Vertical Door Conversion Kit includes:
- One driver-side Vertical Doors, Inc. hinge assembly
- One passenger-side Vertical Doors, Inc. hinge assembly
- Two gas shocks
- Required mounting hardware
- Vehicle-specific installation instructions
The kit uses your Sierra's original front door shells. Replacement factory door shells are not included.
VDI fitment assistance, installation guidance, adjustment support, and replacement-component assistance are services provided separately from the physical parts in the package.
How the GMC Sierra Vertical Door Conversion Works
Once installed and properly adjusted, the converted front door opens outward until it reaches the hinge system's designed stopping point. From there, the door raises vertically with gas shock assistance.
The door does not lift straight upward from its fully closed position. The initial outward movement provides the intended clearance for vertical operation.
Correct installation and adjustment are essential for hinge movement, latch engagement, wiring clearance, weather sealing, and clearance around the front fender and adjacent body panels.
Installation Requirements and Modifications
The VDI hinge system is designed around the factory door-hinge mounting area. However, bolt-on does not mean the entire installation is modification-free.
Installation commonly requires front-fender removal, door-panel removal, wiring management, non-visible trimming or clearance work, and careful final door alignment.
Before Removing the Factory Hinges
Use 2-inch painter's tape to mark the original door position before loosening or removing the factory hinges.
Place tape across the door and adjacent body at several reference points, including near the hinge area and firewall. Draw matching alignment marks across the tape to document the original horizontal and vertical door position.
These reference marks help the installer identify the original alignment during hinge installation and adjustment.
Door Wiring Preparation
Door-panel removal is commonly required to access the factory door wiring and obtain additional wire slack.
The installation process may involve cutting the factory wiring boot for routing. The factory electrical wires usually do not need to be cut. Follow the supplied vehicle-specific instructions and verify adequate wire clearance throughout the door's complete movement.
Inner-Fender and Body-Panel Clearance
Front-fender removal provides access to the original hinge area. Inner-fender trimming is commonly required to provide clearance for the conversion, but this work is generally concealed when the surrounding panels are reassembled.
Before completing the installation, inspect all clearances between the moving door, hinge system, wiring, front fender, and adjacent body panels.
Final Installation Checks
- Safely support each front door during hinge removal and installation.
- Follow the supplied instructions for mounting hardware, hinge stops, and gas shock positioning.
- Verify adequate factory wiring clearance throughout the door's movement.
- Check alignment between the door, front fender, and surrounding body panels.
- Test the outward and vertical opening movements.
- Confirm proper latch engagement and weather sealing.
- Complete final door alignment and operation checks before road use.
If you're unfamiliar with automotive door alignment, body-panel removal, trimming, wiring clearance, or hinge adjustment, use an experienced automotive customization or body shop.
GMC Sierra Installation Options
Choose an installation option based on your experience, truck configuration, and location.
Independent installers establish their own labor pricing, scheduling, and workmanship warranty terms. Confirm these details directly with your chosen shop.
Can the Sierra Be Returned to Factory Hinges?
The conversion retains the original factory front door shells, and reinstalling the original hinge configuration may be possible.
However, trimming, wiring modifications, drilling, or other installation-related changes may require additional repairs or replacement components before the truck can be returned to its original factory configuration.
Keep your original hinge assemblies and mounting hardware. Discuss possible restoration requirements with your installer before beginning the conversion.
Choosing the Correct GMC Sierra Vertical Door Kit
GMC Sierra model years overlap between different truck generations. That is especially important for 2019 and 2020 trucks.
The redesigned Sierra 1500 introduced the newer T1XX platform for 2019. The Sierra 2500HD and 3500HD remained on the earlier K2XX platform through 2019 and transitioned to the newer T1HD platform for 2020.
Before You Order
- Confirm the exact GMC Sierra model year.
- Identify whether your truck is a Sierra 1500, 2500HD, or 3500HD.
- Confirm the correct T1XX or T1HD generation.
- Verify your truck's exact cab and front-door configuration.
- For a 2019 Sierra 1500, distinguish the redesigned T1XX truck from the previous-generation Sierra Limited.
- For a 2019 Sierra 2500HD or 3500HD, select the earlier K2XX application instead.
- Disclose aftermarket fenders, custom bodywork, collision repairs, replacement hinges, or modifications near the hinge mounting area.
- Review the current shipping and return policies before ordering.
Truck and SUV kits are nonrefundable and non-exchangeable. Confirm your exact vehicle application before ordering.
Review the current refund policy and shipping policy for applicable terms and exceptions.
Frequently Asked Questions
What years does the GMC Sierra Lambo Door Kit fit?
Vertical Doors, Inc. part VDCGMCSIER19 covers approved 2019-2026 GMC Sierra 1500 applications and 2020-2026 GMC Sierra 2500HD and 3500HD applications. Confirm the truck's exact cab and door configuration before ordering.
Does this kit fit a 2019 GMC Sierra 1500?
Yes, the redesigned 2019 GMC Sierra 1500 on the T1XX platform is included in the approved application. The previous-generation 2019 Sierra 1500 Limited is not included in this kit's approved fitment list and requires separate confirmation.
Does this kit fit a 2019 GMC Sierra 2500HD or 3500HD?
No. The 2019 Sierra 2500HD and 3500HD belong to the earlier K2XX generation. Use the separately approved VDCGMCSIER14 application.
Does this kit fit a 2020 GMC Sierra 2500HD or 3500HD?
Yes. The redesigned 2020 GMC Sierra 2500HD and 3500HD are included in the approved T1HD application for part VDCGMCSIER19. Confirm the exact truck configuration before purchasing.
Does the kit fit GMC Sierra Denali models?
Denali is a trim designation offered on multiple Sierra duty series and generations. Confirm the model year, Sierra 1500/2500HD/3500HD designation, vehicle platform, and cab configuration before ordering. A Denali badge alone does not confirm kit compatibility.
Does the kit fit GMC Sierra AT4, AT4X, or Denali Ultimate models?
These are GMC trim designations offered on different Sierra models and years. Exact fitment depends on the approved vehicle application and body configuration. Contact VDI with your truck details when confirmation is needed.
Is VDCGMCSIER19 a universal Lambo Door Kit?
No. VDCGMCSIER19 is a vehicle-specific Vertical Door Conversion Kit for approved GMC Sierra applications. It is not a universal weld-on hinge conversion.
Do I need to replace my Sierra's factory front doors?
No. The conversion retains the original factory front door shells. VDI hinge assemblies and gas shocks change the opening movement.
Do GMC Sierra Lambo doors open outward before lifting?
Yes. The front doors open outward until reaching the hinge system's designed stopping point. They then raise vertically with gas shock assistance. The doors do not lift straight upward from their fully closed position.
Does the Sierra Vertical Door Kit require cutting factory wiring?
Factory wires usually do not need to be cut. However, installation may require additional wiring slack and cutting the factory wiring boot for proper routing. Follow the supplied application-specific instructions.
Does the installation require trimming or door adjustment?
Yes. Installation commonly involves front-fender and door-panel removal, non-visible clearance trimming, wiring management, and careful door alignment. Bolt-on describes the vehicle-specific hinge mounting design, not a modification-free installation.
Can I install the GMC Sierra Vertical Door Kit myself?
Installation requires the appropriate tools, a safe workspace, and experience with door alignment, hinge installation, wiring management, and body-panel clearance. We recommend a qualified automotive customization or body shop if you're unfamiliar with the work.
Can Vertical Doors, Inc. install the kit on my Sierra?
Contact Vertical Doors, Inc. about factory installation at our Lake Elsinore, California headquarters. You can also explore qualified independent installation shops.
Will aftermarket fenders or custom bodywork affect installation?
They may. Aftermarket fenders, custom body panels, collision repairs, and modifications around the hinge mounting area can affect clearance and alignment. Provide photographs and details to VDI before ordering.
Can the doors be returned to their original factory hinges?
Returning to the original hinge configuration may be possible, but trimming, wiring changes, drilling, or other modifications may require repairs or replacement parts. Keep your original hinges and discuss restoration requirements with your installer.
What warranty comes with the GMC Sierra Vertical Door Kit?
Vertical Doors, Inc. provides a limited lifetime hinge warranty and a six-month gas shock warranty, subject to applicable warranty terms. Contact VDI for warranty questions or replacement-component assistance.
Ready to Add Vertical Doors to Your GMC Sierra?
Confirm your Sierra's model year, duty series, and cab configuration, then order the genuine Vertical Doors, Inc. conversion system designed for your truck.
Part Number: VDCGMCSIER19
View GMC Sierra Vertical Door Kit Confirm Fitment With VDI
“Just an awesome experience today at Vertical Doors! This company takes care of their customers! Thank you for making our son's day. You all rock!”
“Vertical Doors Inc is the original name in the game when it comes to Lambo Doors. I had the pleasure of buying their kit for my 2014 C7. I highly recommend getting the install done by them as the process is quite extensive! They had me in and out in one day. No door gaps to speak of and the hinges feel smooth and strong. Don't try doing the kit at home, let the pros do it for you. They also gave me a deal on some beautiful true carbon fiber skirts made in house! Shout out to their sibling company California SuperCoupes.”
“I was having trouble with my C8 Door after a terrible attempt at install by another company (Eikon Motorsports). I called Vertical Doors and Danny was able to be a hugeeeee help. He got me in right away, told me exactly what the problem was, knowledgeable, extremely responsive, and communicated with me the whole way through. I cant say enough of the team there. I wish I would have come to them in the first place.”
Ordered my 2018 SS Camaro kit during the COVID crises. The team worked hard to get my kit to me during this critical time. I am so pleased with the new look. It took my Camaro to a new level. Great craftsmanship and best kit anywhere. - TJ from Florida
“I have ordered and self installed a C7 Corvette Vertical door kit on my convertible. The kit is a top quality product and great tech help if needed. I am looking forward to doing a C8 install later this year. Just waiting on my Corvette to be made and delivered.”
I have ordered and self installed a C7 Corvette Vertical door kit on my convertible. The kit is a top quality product and great tech help if needed. I am looking forward to doing a C8 install later this year. Just waiting on my Corvette to be made and delivered.
