Need a custom setup to match how you operate? From PTO systems to hi-rail installations, we deliver specific modifications tailored to your truck or equipment—built for durability, performance, and safety.

Truck Modifications in Dubuque, IA
When your job demands more than a standard setup, you need modifications that go the distance. At Guys Truck and Tractor, we offer specific truck and equipment modifications that improve efficiency, increase functionality, and ensure safety in any environment.
Our experienced technicians handle a wide range of jobs, including:
- PTO system installation for hydraulic operations
- Hi-rail conversions and FRA inspections
- Custom mounting for cranes, racks, or compressors
- Frame alterations and reinforcements
- Custom lighting and electrical setups
- Heavy-duty bumpers, winches, and towing hitches
Experience the Guys Truck and Tractor Difference!
Two Fully Equipped Locations: Whether you're in Kieler, WI, or Galena, IL, we’re ready to modify your equipment to meet your specific job demands.
22 Service Bays: With high-capacity bay space, we can handle even the most complex modifications quickly—no long waits, no compromises.
Nearly 40 Years of Experience: Since 1977, we’ve helped operators across industries get the right setups for safety, performance, and compliance.
Workmanship and Parts Warranties: Every modification comes backed by a 6-month labor warranty and full manufacturer part coverage, so you get results that last.
Contact Us About Specific Modifications Now: Call 608-568-3257!
When you need modifications done right, give us a call. We’ll talk through what you need and provide custom solutions that hold up under pressure. Call now to start your custom build.
FAQs
What Areas Do You Serve For Preventive Maintenance?
Kieler, WI Location: 3405 County Road HHH, Kieler, WI 53812 – Call us at 608-568-3257
We proudly serve: Dubuque, IA; Platteville, WI; Monroe, WI; Freeport, IL; Madison, WI; Waunakee, WI; Middleton, WI; Fitchburg, WI; Hazel Green, WI; Dickeyville, WI; Cuba City, WI; and Benton, WI.
Galena, IL Location: 11521 AJ Harle Dr, Galena, IL – Call us at 815-777-3257
We offer our services in the following areas: Dubuque, IA; Freeport, IL; Clinton, IA; Sterling, IL; Rock Falls, IL; Moline, IL; Rock Island, IL; Platteville, WI; Monroe, WI; East Dubuque, IL; Hazel Green, WI; Stockton, IL; Elizabeth, IL; Apple River, IL; Hanover, IL; and Warren, IL.
What Are Specific Modifications?
Specific modifications are tailored upgrades like PTO installs, frame adjustments, or hi-rail conversions designed to fit your vehicle’s job-specific needs.
Do You Work with Hi-Rail Systems?
Yes. We install and modify hi-rail systems from Rafna, Continental Rail, Harsco, and DMF, including full FRA inspections and compliance work.
Can You Help Plan the Right Modifications?
Absolutely. We walk you through every option, provide honest recommendations, and ensure everything aligns with your vehicle and operational needs.
How Can I Get Specific Modifications?
Call 608-568-3257 to connect with a tech today. We’ll discuss your equipment, the job it needs to do, and how to modify it to get the best results.
Our Heavy-Duty Diesel Mechanic Services
Keep your fleet running strong in Dubuque, IA with our full lineup of heavy-duty services. We handle preventive maintenance, DOT inspections, mobile truck repair, welding, towing, hydraulics, and fleet programs—everything you need to stay on schedule and avoid breakdowns.
Testimonials
Here's what our customers are saying, feel free to leave us a review!
Edward Toma


