MAK Truck & Trailer Repair Shop provides the best service in Gary, IN. Highly trained mechanics with years of experience will get you up and running in no time!!

• Tire, Trailer & Truck Repair Services
• Tire Sales, Replacement, Rotation & Wheel Alignment
• New, Used, Retread Tires - Spin Balancing
• Computer Diagnostic - All Models
• Oil Change, Differential & Trans. Fluid Change
• PM Services, Brakes, Coolant Drain & Fill
• Starter, Alternator, Battery Replacement & More
• Parking with your own Code for Easy Access

Boss Truck Shops provide:

24-Hour Dedicated Call Center for Emergency Breakdowns

New Tires: Bridgestone, Goodyear, Michelin, IronMan, Cooper, Continental, Double Coin & Retreads: Bridgestone/Bandag, Goodyear, Michelin & Used

• Mobile & In-Shop Truck, Trailer & Tire Repair
• Oil Change & Lube, DOT & CSA Inspections
• Alternators, Starters, Lights & Wiring Repairs
• Suspension, Exhaust, Gear Box & U-Joint Repairs
• Brakes, A/C, Heating, Belts/Hoses, Batteries & More
• NOREGON JPRO Computer Diagnostics (Forced Regen)

ASE Certified Technicians and All Technicians are TIA Trained

The Diesel Geeks

“Diesel Down? Geeks Roll Out.”

Business Description

The Diesel Geeks is a mobile heavy-duty truck and trailer repair service specializing in fast, reliable roadside and on-site repairs for commercial vehicles. We focus on minimizing downtime for owner-operators and fleets by delivering professional, dealer-level service directly where it’s needed—on the road, at your yard, or at your job site.

We do not tow—we fix the problem on-site.

With a strong emphasis on efficiency, transparency, and real-world diagnostics, The Diesel Geeks keeps trucks moving and businesses running.

Core Services

Mobile truck repair (on-site diagnostics & repairs)

• Truck & trailer tire service
• Trailer repair (air systems, brakes, lights, etc.)
• Fleet maintenance & service
• Electrical diagnostics & repair
• Starting/charging system diagnostics
• Jump starts
• Lockouts
• Fuel system priming
• Preventative maintenance
• Shop repair services (by appointment)

Specialties

Advanced diagnostics (DPF / DEF / EGR systems)

• Aftertreatment troubleshooting & regen issues
• Air system leaks and brake systems
• Suspension & alignment-related repairs
• Driveline and vibration diagnostics
• Emergency roadside repairs

Service Area

Based in the Chicagoland region, serving:

• Illinois
• Northwest Indiana
• Surrounding Midwest corridors

What Sets Us Apart

• True mobile service – we come to you
• No towing required – faster and more cost-effective
• Dealer-level diagnostic approach without dealer delays
• Fast response times
• Real-world, experienced technicians
• Transparent communication and service write-ups

Target Customers

• Owner-operators
• Trucking companies & fleets
• Logistics & transportation companies
• Contractors with diesel equipment

Business Model

• Mobile-first service
• Road call + hourly labor structure
• Fleet account & contract options available
• Emergency and scheduled service

Boss Truck Shops provide:

24-Hour Dedicated Call Center for Emergency Breakdowns

New Tires: Bridgestone, Goodyear, Michelin, IronMan, Cooper, Continental, Double Coin & Retreads: Bridgestone/Bandag, Goodyear, Michelin & Used

• Mobile & In-Shop Truck, Trailer & Tire Repair
• Oil Change & Lube, DOT & CSA Inspections
• Alternators, Starters, Lights & Wiring Repairs
• Suspension, Exhaust, Gear Box & U-Joint Repairs
• Brakes, A/C, Heating, Belts/Hoses, Batteries & More
• NOREGON JPRO Computer Diagnostics (Forced Regen)

ASE Certified Technicians and All Technicians are TIA Trained

24 Hour Mobile, Roadside & Towing Service

• Truck, Trailer, Tire & Reefer Repair
• Fully Equipped Repair Shop
• Computer Diagnostics & DOT Inspections
• On-Site & Fleet Maintenance
• AC, Brake, Suspension & Electrical Repairs
• Full Preventative Maintenance Service
• New, Used & Recapped Tires Available
• Jump Starts, Fuel Deliveries, Lockouts & More

ASE Master Certified Heavy Duty Truck Technician

Servicing Chicago SW and West Suburbs Area - 60 Mile Radius

Express Truck Repair Provides:

24 Hour In Shop, Roadside & On-Site Semi Truck Repairs

• Truck, Trailer, Tire & Reefer Repairs
• Fully Equipped Repair Shop Facility
• Fully Equipped Mobile Service Trucks
• Heavy Duty Towing & Recovery Available
• Computer Diagnostics & DOT Inspections
• Mobile Welding & Air Leaks
• New, Used & Recap Tires
• Jump Starts, Fuel Deliveries & Much More

Sigmund’s Mobile Truck & Trailer Repair is a trusted provider of heavy-duty truck and trailer services, offering both on-site mobile repairs and in-shop support for commercial fleets and independent operators. Located in Melrose Park, IL, we bring expert maintenance and inspection services directly to your location—saving you time, hassle, and costly downtime.

• Mobile and in-shop truck & trailer repairs
• DOT inspections and compliance checks
• Preventive maintenance and diagnostics
• Fleet servicing for local and regional operators

Fast, reliable on-site service across Chicagoland and North Texas

24 Hour Mobile, Roadside & Towing Service

• Truck, Trailer, Tire & Reefer Repair
• Fully Equipped Repair Shop
• Computer Diagnostics & DOT Inspections
• On-Site & Fleet Maintenance
• AC, Brake, Suspension & Electrical Repairs
• Full Preventative Maintenance Service
• New, Used & Recapped Tires Available
• Jump Starts, Fuel Deliveries, Lockouts & More

ASE Master Certified Heavy Duty Truck Technician

Servicing Chicago SW and West Suburbs Area - 60 Mile Radius