CarbonPro bed
The carbon-fiber composite inner box doesn't dent like steel; it can crack or gouge. Cosmetic damage may be repairable, while damage near mounting points usually means replacement under GM's procedures.
GMC repair guide
Steel frames, aluminum closures, composite beds
The Sierra 1500 rides on a steel frame, a point that matters because aluminum is sometimes wrongly assumed. Since the 2019 redesign, its doors, hood and tailgate are aluminum, and some trims have offered the CarbonPro bed, with a carbon-fiber composite inner box instead of steel. The Sierra HD, Canyon and Yukon are body-on-frame too, while the Acadia and Terrain are unibody crossovers. The Hummer EV and Sierra EV are electric trucks built on GM's Ultium battery platform.
So a GMC repair can involve steel straightening, aluminum panel work and composite repair on the same vehicle. We confirm the model, year and options from the VIN, measure the frame on our frame bench after any significant impact and repair aluminum with its own tools in its own area. Denali brightwork, the MultiPro tailgate and the cameras built into it all get checked. See our frame straightening page for how frames are measured.
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Steel frames and aluminum closures
On a Sierra, the frame and the panels you see are different metals. Each needs its own approach.
01
Steel frame
The frame is measured against GM's dimensions after a significant impact. Whether a frame section can be straightened, sectioned or replaced is set by GM's repair information.
02
Aluminum doors, hood and tailgate
Aluminum dents differently from steel and is less forgiving when stretched. Light damage can often be repaired with aluminum dent tools; creased panels are usually replaced.
03
No cross-contamination
Steel particles on aluminum cause corrosion months later. Our aluminum work uses dedicated tools in a separate area.
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CarbonPro beds and MultiPro tailgates
Two GMC features that change what a rear-end repair looks like.
MultiPro tailgate
The MultiPro tailgate has an inner gate, extra hinges and latches, and often a camera. After rear damage, each function is tested, not just whether it closes.
Bed sides and hitch
Outer bed sides, the bumper and the hitch are checked together after a rear impact, because load through a hitch goes straight into the frame.
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Denali brightwork and AT4 off-road damage
Denali grilles and trim
Denali models carry large grilles and bright trim specific to the trim level. Damaged pieces are assessed individually and replacements are ordered by VIN to match.
AT4 and AT4X
Off-road trims add skid plates, rocker protection and underbody parts. After trail damage, these are inspected with the frame and suspension.
Cameras and Super Cruise
Many GMCs carry cameras in the grille, mirrors and tailgate, and Super Cruise relies on cameras and radar. When GM requires calibration after a repair, a dealer or calibration specialist does it, and it's in your plan.
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Hummer EV and Sierra EV
A very large battery
The Hummer EV and Sierra EV carry large Ultium battery packs in the floor. Damage near the underbody or sills follows GM's procedures for inspecting the pack and making the system safe.
Hummer EV roof panels
The Hummer EV's removable roof panels are checked for fit and sealing after any damage near the roof or pillars.
We explain who does what
Some steps on an electric truck need the high-voltage system disabled first. We explain which steps your repair involves, and who performs them, before you authorize anything.
Model guide
GMC models and their construction
A general guide by family. Model year and options matter, so we confirm your vehicle from the VIN.
Pickups
- Sierra 1500
- Steel frame; aluminum doors, hood and tailgate from 2019; CarbonPro bed on some trims.
- Sierra HD
- Heavy-duty pickup on a steel frame.
- Canyon
- Midsize body-on-frame pickup; AT4X off-road trim.
SUVs
- Yukon, Yukon XL
- Body-on-frame full-size SUVs.
- Acadia, Terrain
- Unibody crossovers.
Electric
- Hummer EV pickup and SUV
- Ultium battery platform; removable roof panels.
- Sierra EV
- Electric full-size pickup on the Ultium platform.
Construction notes are general. GM's repair information for your exact vehicle is what the repair follows.
Good to know
Before you book a GMC repair
Trucks that tow and work
Hitches, toolboxes, racks and upfits are removed and refitted as part of the repair. Tell us what's fitted, so it's in the plan from the start.
Electric GMCs
Hummer EV and Sierra EV owners: tell us about any warning messages after an impact. Damage near the battery is handled according to GM's procedures, and we explain who performs each step.
Inspection
What we check on every GMC
Photos show what's visible. These checks happen at the in-person inspection, before a repair plan is written.
- Model, year, trim and options from the VIN
- Steel frame measurements after any significant impact
- Aluminum doors, hood and tailgate: repairable or due for replacement
- CarbonPro bed condition, including mounting points
- MultiPro tailgate functions and the tailgate camera
- Hitch, bumper and rear frame section after rear impacts
Repair cost guide
What GMC repairs cost: planning ranges
These are the ranges from our repair cost guide for a GMC. They help you plan; they are not a quote. Year, model, materials and hidden damage can move the final price, which follows an inspection.
| Repair | Planning range |
|---|---|
| Small dent, paint not damaged | $150 to $500 |
| Scratches, scuffs or a dent that needs paint | $350 to $1,200 |
| Bumper repair or replacement | $600 to $1,800 |
| Door, fender or quarter-panel damage | $800 to $2,500 |
| Major collision or structural damage | $5,000 to $15,000+ |
| Hail damage | $2,500 to $8,000+ |
| Full respray or color change | $5,000 to $12,000 |
Good parts availability and conventional steel construction usually keep straightforward repairs toward the lower end. Final pricing follows an inspection; confirm tax and all inclusions in your written estimate. Ranges last reviewed October 2026.
Compare repair types in the cost guideHow it works
How a GMC repair works with us
- 1
Send photos
Photos of the damage, the year and model, and the VIN if you have it. We reply with a free first estimate. You can do this today.
- 2
In-person inspection
From January 2027, at our Round Rock workshop. On a GMC truck, we first check the frame, then identify which panels are aluminum, steel or composite. Structural damage is measured on our frame bench against factory dimensions.
- 3
Written repair plan
Repair method, parts and paint, written down before you authorize anything. OEM parts wherever the manufacturer requires them. Driver-assist calibrations are done by a dealer or calibration specialist and listed in the plan.
- 4
Repair and handover
Repairs follow the manufacturer's procedures. Color is read with a spectrophotometer and sprayed in our paint booth, and you review the finished car with us before you take it home.
Insurance claim?
In Texas you choose the repair shop, not your insurer. We are independent, not part of an insurer's direct repair program. We write the supplements and push for OEM parts where the manufacturer requires them. How we handle claims
Warranty and timing
Warranty terms are given in writing before any work starts. Parts lead times vary by model, so we confirm timing once parts are ordered rather than promising a date up front.
GMC repair questions
Is the GMC Sierra's frame aluminum?
No. The Sierra's frame is steel. Since 2019, the Sierra 1500's doors, hood and tailgate are aluminum, and some trims have a carbon-fiber composite bed, so a repair can involve all three materials.
Can a CarbonPro bed be repaired?
It depends on the damage. Some cosmetic damage can be repaired, but cracks near mounting points or in structural areas usually mean replacement, following GM's repair information.
My MultiPro tailgate doesn't work right after a hit. Can it be fixed?
Usually the damaged hinges, latches or panels can be replaced. We test every function of the tailgate, including the camera, after the repair.
Can you repair Denali chrome and grilles?
We assess each piece. Some trim can be refinished; other pieces are replaced with parts ordered by VIN to match your Denali.
Are you a GM certified collision shop?
No. We're an independent body shop and don't claim GM certification. We follow GM's repair information and use OEM parts where it requires them.
Do you repair the Hummer EV?
Send photos and we'll tell you what the repair involves. Damage near the battery follows GM's specific procedures, and we explain who performs each step before you authorize anything.
