Air brake system faults
Air leaks, slow brake application, and low air pressure warnings get diagnosed and repaired on-site whenever the fix is within reach of our service truck.
Fleet & Heavy Truck Service
Heavy Duty Truck Repair in Grande Prairie
Heavy trucks running Highway 2 toward Sexsmith and Dawson Creek, hauling grain out of the county, or working oilfield lease roads take a beating that a light-duty vehicle never sees. Northern Mobile Repair works on the brakes, suspension, air systems, and driveline components that keep tandem and tridem axle trucks, tractors, and straight trucks moving through Grande Prairie's freight, ag, and energy sectors. Instead of parking a truck for days waiting on a shop bay, we bring a heavy duty mechanic and a stocked service truck to your yard or the roadside.
We know the difference between a wear item that can wait and a defect that shouldn't move another kilometre, and we'll tell you which one you're dealing with. Spring road bans, gravel pit traffic, and constant loading and unloading all accelerate wear on brakes, air lines, and suspension components, and commercial fleets running tight schedules can't afford surprise downtime. Our goal is to get an accurate diagnosis on-site, complete the repairs we're equipped to do, and give you a straight answer if a job needs a full shop.
Heavy Truck Issues We Handle
Suspension and steering wear
Worn bushings, leaf springs, and steering components affect handling and load stability — we inspect and replace what's failing.
Driveline and u-joint issues
Vibration, clunking, or noise under load often traces back to driveline wear that needs attention before it causes bigger damage.
Trailer and hitch problems
From fifth wheel issues to trailer brake and lighting faults, we service the connection between tractor and trailer.
Cooling system failures
Overheating on grades or under load is a common call — we check radiators, fans, hoses, and coolant systems.
Exhaust and emissions faults
DPF and emissions-related warning lights are diagnosed so you know whether it's a sensor, a regen issue, or something more serious.
Signs Your Truck Needs Service
- Low air pressure warning or slow brake buildup
- Pulling to one side or uneven tire wear
- Vibration or clunking from the driveline under load
- Air leaks you can hear at idle
- Trailer brakes engaging late or unevenly
- Overheating on grades or in stop-and-go traffic
- Warning lights related to emissions or DPF regen
- Visible leaning or sagging on one corner of the truck
Getting a Truck Serviced
We keep fleet and owner-operator calls moving quickly so trucks spend less time parked.
- 1Describe the issue
Call in with the symptoms, unit number if it's a fleet truck, and your location — yard, job site, or Highway 43 shoulder.
- 2We confirm scope
We'll ask enough questions to know what parts and tools to bring so the first visit counts.
- 3Truck arrives on-site
A heavy duty mechanic shows up equipped for brake, suspension, air system, and driveline work.
- 4Inspection and diagnosis
We check the whole system related to the complaint, not just the symptom, since heavy truck issues often connect to more than one component.
- 5Repair or shop referral
We complete what we can roadside and give you a clear picture if the job needs a shop with a lift or press.
What We Carry for Heavy Truck Calls
Our trucks stock the parts and tools that cover most heavy duty brake, suspension, and driveline repairs.
- Air brake chambers, valves, and fittings
- Brake shoes, pads, and drums
- U-joints and driveline components
- Suspension bushings and hardware
- Trailer lighting and electrical connectors
- Coolant system hoses and clamps
- Fifth wheel and hitch hardware
- Air line and glad hand repair kits
- Diagnostic scan tools for emissions and engine faults
We service heavy trucks and fleets across Grande Prairie and outlying communities including Clairmont, Wembley, Sexsmith, Beaverlodge, Hythe, and the gas plants and gravel pits along the county roads. See the full service area.
Why Fleets Call Northern Mobile Repair
Fleet-ready dispatch
We understand commercial fleets run on schedules, and we work to minimize downtime with clear communication on ETAs and scope.
Experience with local freight routes
Trucks running Highway 2 and Highway 43 daily see specific wear patterns, and we know what to check first.
Straightforward assessments
We won't push repairs a truck doesn't need, and we'll flag anything that requires a full shop rather than trying to force it roadside.
Heavy Duty Repair FAQs
Do you service commercial fleets?
Yes, we work with trucking, oilfield, construction, and ag fleets across the Grande Prairie region.
Can you fix air brake issues on-site?
In most cases yes — we carry common air brake components and can diagnose and repair leaks, valves, and chambers roadside.
What if my truck needs a full shop repair?
We'll tell you directly if the repair needs equipment like a lift or press that isn't available on a service truck, and help you plan next steps.
Do you work on trailers too?
Yes, we service trailer brakes, lighting, and hitch components alongside the tractor.
Can you respond to a breakdown on Highway 43?
Yes, we dispatch to highway breakdowns as well as yards and job sites throughout the region.
Do you handle DPF and emissions warning lights?
We can diagnose emissions-related fault codes on-site to help determine the cause before further repair.
More answers on the general service FAQ.
Keep Your Trucks Running
Call Northern Mobile Repair for on-site heavy duty truck and trailer service anywhere around Grande Prairie.
Related repair services
Commercial Fleet Repair
Ongoing mechanical support for fleets of all sizes.
Trailer Repair
Dedicated trailer brake, lighting, and hitch service.
Emergency Roadside Truck Repair
Fast response for breakdowns that can't wait.
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