916 Truck Repair provides truck roadside service across Sacramento and all major Northern California highway corridors. Mobile diesel engine repair, air brake service, electrical diagnostics, trailer repair, and heavy-duty jump starts for...
When a commercial truck breaks down on the highway, roadside shoulder, truck stop, or loading dock, every hour of downtime costs the driver and fleet real money in missed deliveries, late fees, and cargo spoilage. A truck roadside service call is fundamentally different from calling AAA for a flat standard vehicle tire or dead battery. Commercial trucks require heavy-duty diagnostic equipment, diesel-specific repair knowledge, air brake system experience, and the ability to perform repairs in challenging roadside conditions — often at night, in weather, and with trucks carrying loaded trailers.
916 Truck Repair provides truck roadside service in Sacramento that addresses the real needs of commercial truck operators. Our mobile technician arrives in a fully equipped service truck carrying diesel engine diagnostic scan tools for Cummins, Detroit, Caterpillar, and Volvo engines, air brake repair components including hoses, fittings, chambers, and slack adjusters, electrical diagnostic equipment including oscilloscopes and battery load testers, a comprehensive inventory of commonly failed truck parts, and the tools to perform serious repairs — not just temporary patches that get you to a shop.
We provide truck roadside service along every major corridor serving Sacramento: I-5 from Woodland through Sacramento to Stockton and Lodi, I-80 from Davis through Sacramento to Auburn, Colfax, Truckee, and into Reno and Sparks, Highway 99 from Sacramento south through Galt and Stockton, Highway 50 from Sacramento east to Folsom and Placerville, and all connecting state routes and local roads throughout the Sacramento Valley. When your truck breaks down anywhere in our coverage area, dispatch availability depends on location, time, parts, and current technician schedule.
Roadside diesel engine service using commercial-grade diagnostic scan tools that read manufacturer-specific fault codes from Cummins, Detroit Diesel, Caterpillar, Volvo, Mack, and International engine control modules. We diagnose derate conditions that limit engine power and speed, DPF and DEF system faults that trigger warning lights and countdown timers, EGR valve failures causing poor performance and black smoke, turbocharger faults causing low boost pressure and power loss, fuel system problems including injector failure, lift pump failure, and fuel contamination, and sensor circuit faults causing check engine lights and drivability issues. Many engine faults that cause a roadside shutdown can be diagnosed and resolved on-site without a tow.
Roadside air brake repair for the most common causes of commercial truck brake system failures. We replace failed brake chambers — spring brake chambers and service brake chambers — at all wheel positions. Slack adjuster replacement and adjustment restores proper pushrod travel and brake timing. Air hose and air line replacement repairs leaks and ruptures in the air supply and delivery circuits. Gladhand seal replacement at the tractor-trailer connection eliminates air loss between units. Relay valve and quick release valve diagnosis identifies pneumatic control faults. ABS sensor and wiring repair addresses trailer ABS warning lights. Air compressor, governor, and air dryer diagnosis addresses system-level air supply failures. Every air brake roadside repair is followed by a full system pressure test to verify FMCSA compliance before the truck returns to the road.
Electrical system failures are a leading cause of roadside breakdowns on modern commercial trucks with their complex multiplexed electrical architectures. Our roadside electrical service includes heavy-duty battery testing and replacement for single batteries and parallel battery banks, alternator diagnostics and replacement for 12-volt and 24-volt charging systems, starter motor diagnostics including voltage drop testing on the starting circuit under cranking load, parasitic draw diagnosis when batteries drain overnight, wiring harness repair for damaged or chafed circuits, and lighting system repair for headlights, tail lights, brake lights, turn signals, and marker lights. A truck that will not crank requires systematic electrical diagnosis — we bring the tools and knowledge to do it at the roadside.
Trailer breakdowns strand both the trailer and the tractor connected to it. Our roadside trailer repair covers lighting and wiring faults including 7-way connector replacement and harness repair, air brake system components on the trailer including relay valves, spring brake chambers, and air lines, suspension repairs including air spring replacement and height control valve service, axle and wheel end repairs including bearing service and seal replacement, door repair including overhead door cables, rollers, and track issues, landing gear repair for trailers that cannot be coupled or uncoupled, and liftgate electrical and hydraulic troubleshooting. We service dry vans, refrigerated trailers, flatbeds, step decks, lowboys, tankers, and dump trailers from all major manufacturers.
Commercial truck jump starts require equipment mobile for the battery banks and starting current demands of Class 8 diesel engines. A typical semi truck has two to four Group 31 batteries in parallel, and the starter motor draws 300 to 700 amps during cranking. standard jump packs and jumper cables cannot deliver this current safely or effectively. Our service truck carries heavy-duty jump start equipment mobile for commercial truck battery banks, with proper cable gauge and connector ratings to deliver the necessary cranking amperage without voltage drop or overheating. After a jump start, we perform charging system verification — checking alternator output, battery condition, and parasitic draw — to determine why the batteries discharged so the problem does not repeat at the next shutdown.
Fuel-related breakdowns include fuel filter restriction from contaminated fuel, lift pump failure on engines with chassis-mounted fuel pumps, fuel line leaks and air intrusion into the fuel system, fuel tank contamination from water, algae, or sediment, gelled fuel in cold weather operation through the Sierra passes, and DEF system faults on aftertreatment-equipped trucks. Our technician carries common fuel filters, fuel line repair materials, and the diagnostic tools to identify fuel system problems at the roadside. Many fuel-related no-start conditions are caused by a restricted filter or air in the fuel system — repairable on-site.
While we focus on mechanical and electrical repairs, our roadside service includes tire-related assistance such as tire pressure checks and inflating tires with onboard air, diagnosing wheel end problems including bearing noise and seal leaks, and coordinating with our network of commercial tire service providers when a tire replacement requires specialized tire-changing equipment. We will not leave you stranded with a tire problem we cannot directly fix — we coordinate the right service to get you moving.
commercial truck roadside assistance services are designed for standard vehicles. They change small tire service, deliver gasoline, and jump-start 12-volt single-battery systems. They do not diagnose a Cummins ISX engine derate, replace a Type 30 spring brake chamber, or trace a J1939 CAN bus communication fault. 916 Truck Repair provides truck roadside service by heavy-duty truck technicians who work exclusively on commercial trucks, semi trucks, and diesel vehicles. The difference matters when your truck is on the shoulder of I-5 at 2 AM and needs a repair that gets it back to the terminal — not a tow to a shop that opens Monday.
Our service truck is a mobile repair facility carrying commercial-grade diagnostic scan tools, heavy-duty battery load testers, digital oscilloscopes, a comprehensive inventory of common replacement parts including air brake components, electrical components, belts, hoses, fittings, filters, and fluids, air compressor and welding equipment, and safety equipment for roadside work including warning triangles, cones, high-visibility lighting, and reflective safety vests. We arrive prepared to perform the repair — not just diagnose and leave.
Our roadside technicians focus on commercial truck systems including diesel engines, electrical/electronic systems, brakes, suspension, and steering. Roadside diagnostics matter when a misdiagnosis means another breakdown 50 miles down the road.
Trucks do not break down on a 9-to-5 schedule. We provide truck roadside service 24 hours a day, 7 days a week, including nights, weekends, and holidays. When you call (916) 898-9090 with your breakdown location, truck details, and symptoms, we dispatch the nearest available technician as scheduling and location allow. Call for the current ETA before dispatch.
Our truck roadside service covers Sacramento, West Sacramento, Elk Grove, Roseville, Rancho Cordova, Citrus Heights, Folsom, Davis, Woodland, Vacaville, Fairfield, Stockton, Lodi, Modesto, Manteca, Tracy, Auburn, Colfax, Truckee, Reno, Sparks, and all connecting highway corridors including I-5, I-80, Highway 99, Highway 50, I-505, and Highway 65. If your truck breaks down anywhere in our Northern California coverage area, call us — we will get a technician to you.
1. Get the truck safely off the roadway — Move to the shoulder, rest area, or exit ramp if possible. Turn on hazard flashers immediately.
2. Set out warning devices — DOT requires reflective triangles or flares placed at 10 feet, 100 feet, and 200 feet behind the truck on the shoulder or lane of travel.
3. Call (916) 898-9090 — Tell the dispatcher your exact location (highway, mile marker, nearest exit, or cross street), truck make and model, engine type, and the symptoms you are experiencing. The more information you provide, the better prepared the technician arrives.
4. Stay with the truck if safe — Do not walk along the highway. Stay in the cab with the seatbelt on if on the shoulder, or behind a guardrail if the location feels unsafe.
5. Do not attempt repairs you are not qualified for — Modern truck systems — high-pressure common rail fuel injection, multiplexed electrical systems, and air brake pneumatic controls — can be dangerous to troubleshoot without proper training and equipment. Wait for the technician.
We operate across the greater Sacramento region and along major Northern California highway corridors. Mobile dispatch to your yard, dock, or roadside.
Mobile truck repair for highway breakdowns, truck stops, fleet yards, docks, and roadside service calls.
(916) 898-9090