Commercial and Heavy Vehicles
Commercial Trucks Repair
The short answer
Medium-duty commercial trucks carry a huge variety of bodies on a common cab chassis, and the cab and body mounting are where they wear out. Cab corner corrosion, mirror and step damage, body mount fatigue, and low-speed impact are the pattern. We repair cabs, bodies, and mounts and refinish fleet colors.
01
What we see on commercial trucks
The medium-duty cab chassis is the workhorse platform of Southern California commerce, and the same cab shows up under a service body in Anaheim, a landscape dump in Irvine, a stake bed in Vernon, and a utility body in Chino. What is consistent across all of them is that the cab is a stamped steel assembly on rubber mounts sitting on a frame that twists constantly, and the body behind it is doing something entirely different. The failures cluster at that boundary. Cab mounts settle, body mounting brackets elongate, and the gap between cab and body opens on one side, which is usually the first visible symptom.
Cab corner and lower panel corrosion is the second pattern, and it is worse here than most operators expect. A commercial truck in this region gets washed frequently, parks outdoors permanently, and often works coastal accounts through the harbor cities. Water sits in the cab corner seam behind the step, salt is in the air, and the corrosion works outward from a seam nobody can inspect. We find it as a paint blister at the bottom of the door pillar, and by that point the metal behind it is thin. Catching it at the blister stage is a panel section and a treatment. Catching it later is a cab corner replacement.
The third thing that keeps these trucks in the shop is low-speed contact in places trucks do not belong. Retail loading zones, alley approaches, older commercial lots in the LA basin, and parking structures built for cars produce mirror strikes, step damage, fender contact, and corner scuffs at a steady rate. None of it is expensive individually. Across a twenty-truck fleet it is a real annual number, and it is the visible condition your customers judge you on. Body and paint is $210 per hour, mechanical and electrical is $260 per hour, and estimates are paid.
Location: All work is performed at our Yorba Linda facility. We do not offer mobile, roadside, or fleet route service.
02
What makes this vehicle different
- Stamped steel cab on rubber mounts over a frame that twists independently under load
- Enormous body variety on a common chassis, so every repair starts with understanding what is mounted
- Cab corner and rocker seams that trap water behind the step and corrode from inside outward
- Mirrors, steps, and grab handles positioned exactly where urban obstacles are
- Body mounting brackets and U-bolts as the fatigue point between cab and body
- Frequently run in fleet colors and livery where refinish match across units matters commercially
- Downtime replaced by a rental or a spare, so total fleet capacity is the real cost driver
03
What actually fails, and why
Cab corner and rocker corrosion
Water sits in the seam behind the step and never fully dries, and coastal accounts add salt to it. The corrosion works outward from an uninspectable seam and shows first as a paint blister at the base of the door pillar, well after the metal has thinned.
Body mount and bracket fatigue
The frame twists, the body does not, and the mounting brackets absorb the difference. Bolt holes elongate, U-bolts loosen, and the cab-to-body gap opens on one side. Retorquing hardware into elongated holes does not hold and it hides the real condition.
Mirror, step, and grab handle strikes
Retail loading zones and alley approaches across the LA basin catch mirrors and steps constantly. Bent step assemblies are a safety item rather than a cosmetic one, because that is where a driver puts full weight while carrying something.
Front fender and bumper corner contact
Tight lots and blind corners produce repeated front corner contact. The bumper takes the first hits, then the fender starts absorbing them, and the fender-to-cab seam opens, which turns a cosmetic dent into a corrosion entry point.
Fleet livery fade and mismatch across units
Trucks bought in different years and parked in different yards fade differently under Southern California sun. A repaired panel matched to a paint code rather than to the actual truck reads as a repair from thirty feet, which defeats the point of a fleet livery.
04
Services we perform on commercial trucks
Service
Cab Body Repair, Door Hood Fender and Bumper
Cab body repair addresses door, hood, fender, bumper, mirror, and step damage on a commercial cab without opening up a full collis
Service
Fleet Collision Repair and Refinish
Fleet collision repair returns a damaged commercial truck or van to service after an impact, covering cab sheet metal, box structu
Service
Collision Repair
Collision repair restores a vehicle to pre-loss structure, fit, and finish after an impact. On RVs and vans that means laminated s
Service
Rust Treatment and Anti-Corrosion Coating
Rust treatment mechanically removes active corrosion, converts or encapsulates the sound pitted metal that remains, and applies pr
Service
Color Match and Panel Blending
Color match and panel blending makes a repaired area disappear into the surrounding finish by spraying color into adjacent panels
Service
Body Panel Repair and Replacement
Body panel repair and replacement covers sidewall sections, compartment doors, skirting, roof caps, and sheet metal on RVs, vans,
Service
Fleet Graphics and Vinyl Wrap
Fleet graphics and wrap covers partial and full vinyl wraps, cut lettering, spot graphics, and removal on commercial vans, trucks,
Service
Pre-Trip Body and Structural Inspection
A pre-trip inspection checks the items that strand people: tires and date codes, bearings, brakes, seals, slides, hitch, and frame
06
Questions about commercial trucks
Frequently asked questions
What does commercial truck cab repair cost?
Cab corner section replacement with corrosion treatment and refinish runs $1,600 to $5,000 per side. Fender and bumper corner work is $900 to $3,000. Body mount rebuild with bracket replacement runs $1,200 to $4,000. Body and paint labor is $210 per hour plus materials. A paid estimate is required and is refundable against an authorized repair.
We run fifteen trucks. How do we keep them all in service?
Schedule the fleet rather than reacting to it. We stage units so no more than one or two are down at a time, and we sequence the cosmetic work behind the safety and function work. On a fleet that size, an annual pre-trip body and structural inspection pass catches corrosion and mount fatigue while it is still a cheap repair rather than a downtime event.
Can you match our fleet color across trucks of different ages?
Yes, and we match to the actual truck rather than to the paint code. A five-year-old unit that has sat in Riverside sun has shifted well off its original code, so a code-matched panel reads as a repair immediately. We spray-out and compare under multiple light sources and blend into adjacent panels so the transition disappears.
Is cab corner rust worth repairing or should we replace the truck?
Depends how far it has gone. Blistering paint with sound metal behind it is a section, treat, and refinish job that buys years. Perforation through the pillar base is structural, and at that point the honest calculation is repair cost against the value and remaining service life of the unit. We document the extent so you can make that call on real numbers.
Do you do engine or DOT work on commercial trucks?
No. Engine, drivetrain, and DOT inspection work is not performed here. Our scope is body, cab, paint, structural welding, corrosion treatment, equipment and body install, and DOT reflective tape and compliance marking. Suspension, brake, and tire service is available at $260 per hour. Everything is done in-shop in Yorba Linda.
07
Related vehicles
Vehicle
Box Trucks
Box trucks put a separately built cargo body on a cab chassis, and the joint between them is where most failures start. Rear frame
Vehicle
Flatbed Trucks
Flatbed trucks carry unprotected loads on an open deck, so the deck, headboard, rub rails, and stake pockets take the damage rathe
Vehicle
Utility Trucks
Utility trucks carry a compartmented service body loaded with tools, parts, and frequently a crane, and the compartments are where
Vehicle
Dump Trucks
Dump bodies take abrasive load impact, hoist stress, and tailgate hardware abuse that no other truck body sees. Floor wear-through
Vehicle
Semi Trucks
Semi tractors take their damage from what happens around them, not to them. Trailer swing contact with the cab, yard hostler strik
08
More commercial and heavy vehicles
Bring your commercial trucks to the shop in Yorba Linda.