
We bring the fix straight to you: air leaks, coolant loss, forced regens, wiring shorts, and other road-killing issues. Because breakdowns rarely happen in perfect spots. More often, it’s along I-80 near exit 123, or on a rain-slicked ramp outside Old Side when your dash lights up with a DEF warning. That’s when our mobile diesel units roll out. Every truck carries tools, diagnostics, and stocked parts so we can chase down the fault and get your rig breathing again. You’ll see us in muddy lots, rest areas, and truck stops all across Old Side County, turning wrenches under floodlights.
If we can wrench it roadside, we’re on it. And if the job’s bigger? We’ll get you towed back to our 40,000-square-foot shop on Dale Road by our in-house towing crew and without wasting daylight. This isn’t "wait on parts" country. This is plug in the diagnostics, dig into the problem, and get it done. We’ve built our service around speed, grit, and showing up when it counts. We know your truck has deadlines to meet and cargo to deliver. Diesel trouble doesn’t care what time it is. Good thing we don’t either.

You don’t need to search far for a Diesel Mechanic who actually shows up prepared. We’ve built our business on rolling directly to you with everything necessary to diagnose and fix the issue roadside. Our mobile crews know the roads between Old Side and Old Side by heart. They’ve handled mid-haul breakdowns outside Falls Creek, after-hours calls in Luthersburg, and long-wait turnarounds off exit 120. If the truck can be fixed where it stands, we’ll make it happen right there.
We stay in tune with the rhythm of the road. Drivers call because they know what to expect—fast answers, no runaround, and fixes that hold past the next weigh station. Some of our calls start with a stressed dispatcher and end with a driver back behind the wheel before dawn. Others turn into repeat routes, familiar faces, and quick nods at the pump the next time through town. Around here, word travels fast when a crew keeps trucks moving.
Step inside, and you’ll hear work in motion: lifts humming, wrenches hitting steel, air lines snapping into place: it’s the sound of trucks getting ready for the next run. Our bays handle the big jobs that roadside service can’t: engine tear-downs, turbo swaps, radiator installs, suspension rebuilds, and wiring overhauls. Each stall is stocked for heavy diesel repair, from axle work to full structural restoration. Nothing sits idle here.
We’ve earned Old Side’s trust by fixing what others misdiagnosed. That’s why independent haulers, local companies, and even other shops send diesel work our way. Cooling system failing under load? Exhaust throwing codes with no apparent cause? We’ll chase it down and explain the fix. Not upsold, not brushed off, just straight diesel repair, built for people who actually rely on their trucks to make a living.
Bigler Boyz handles diesel like it’s supposed to be handled: hands-on, with no steps skipped. And you’ll also find preventive work in the mix: oil changes on schedule, coolant system checks before summer hits, and winter prep that doesn’t just stop at fuel conditioner. We know what local roads and hills can do to a poorly maintained rig, and we help you stay ahead of it. That’s why we’ve been Old Side’s trusted name in diesel repair for decades.
