Your Kenworth Deserves More Than Just Another Repair Shop
It’s 5 a.m. and your loaded T680 won’t build air. Or the derate warning flashes on your W900 dash halfway through a haul, and you already know what that means — a shop, a bill, and a truck sitting still while the clock runs on your delivery window. Every hour that Kenworth is down, you’re bleeding money and dodging phone calls from people expecting their freight. You didn’t buy a Kenworth to babysit it. You bought it to work.
Note: Large vehicles like this are serviced at our Greeley and Fort Morgan locations. Our Brighton shop handles cars and light trucks.
At Bullet Automotive & Diesel, with locations in Greeley and Fort Morgan, CO, we understand that your Kenworth T680, W900, T880, or T370 is the backbone of your business. Our ASE Certified Technicians work on heavy diesel every single day, and we shoot straight about what your truck actually needs — no padded estimates, no mystery line items. Just an honest diagnosis, a clear plan, and the fastest turnaround we can give you so you get back on the road.
Why Kenworth Owners in Greeley and Fort Morgan Choose Bullet Automotive & Diesel
We Speak Your Language, Not Mechanic Jargon
You know your way around an engine. You don’t need to be talked down to or buried in shop-talk designed to confuse you into a bigger bill. When we call, we tell you what’s wrong in plain English and what it’ll take to fix it.
- A straight diagnosis explained in terms that make sense
- Photos and findings from our Comprehensive Multi-Point Vehicle Inspections
- Repairs sorted by what’s a safety must-fix now versus what can wait
- Honest timelines so you can plan your routes and your crew
You’ll never leave our shop wondering what you actually paid for. That clarity is the whole point.
Kenworth Expertise Without Dealership Pricing
Kenworths run PACCAR MX engines, plus Cummins in plenty of older and spec’d units. We have the True Diesel Experience and the diagnostic equipment to read these trucks properly, and we do it without dealership sticker shock or a two-week appointment backlog.
- Heavy-duty diesel diagnostic scanners for PACCAR MX and Cummins platforms
- Technicians who work on Class 8 trucks daily, not occasionally
- Fleet Maintenance Repair Specialists for owner-operators and multi-truck fleets
- Fair, independent-shop labor rates on major driveline and engine work
You get dealership-level capability with a shop that treats you like a partner, not a walking wallet.
Transparency That Rebuilds Trust
If you’ve been burned before — quoted for parts you didn’t need, or handed a surprise bill at pickup — you’re not alone. We built our process to earn back that trust, one honest estimate at a time.
- Written estimates before any wrench turns
- Your approval required before we add anything to the job
- A 12 month or 12,000 Mile Warranty backing our work
- No pressure upsells — we tell you what can wait and we mean it
Our name is Bullet Automotive & Diesel, and our tagline is simple: We Always Shoot Straight.
Comprehensive Kenworth Repair Services in Greeley and Fort Morgan
Kenworth Maintenance Services
Colorado’s brutal temperature swings — below freezing in winter, over 105 degrees in summer — plus the elevation grind from the Denver metro up into the mountains put real stress on a Class 8 truck. Staying ahead of maintenance is how you avoid a roadside breakdown and keep your Kenworth earning.
- Diesel oil and filter changes on PACCAR MX and Cummins engines
- Fuel filter and water separator replacement
- Coolant system service and DEF system checks
- Air brake inspection and adjustment
- Belt, hose, and serpentine drive inspection
- Scheduled preventive maintenance intervals
Our scheduled vehicle maintenance keeps your service history clean and predictable, which matters whether you run one truck or a small fleet.
Kenworth Diagnostic and Repair Services
When a fault code lights up or the truck goes into derate, guessing is expensive. Our diesel repair services start with proper diagnostics so we fix the actual problem the first time.
- Engine and check engine light diagnostics
- Turbocharger and EGR system repair
- DPF and emissions system service
- Fuel injector and fuel system repair
- Transmission and drivetrain repair for automated and manual gearboxes
- Brake repair and replacement including air brake service
We also handle vehicle suspension repair and steering work so your Kenworth tracks straight and rides right under load.
Kenworth Specialty Services
Some jobs on a Class 8 truck take specialized knowledge and the right diagnostic tools. That’s where our heavy-duty focus pays off.
- PACCAR MX engine diagnostics and repair
- Cummins engine service on spec’d units
- Aftertreatment and DEF dosing system repair
- Fleet program setup for multi-truck operations
Whether it’s your daily driver or one truck in a rotation, we keep it running so your business keeps moving.
Model-Specific Kenworth Expertise
Kenworth T680 Service and Repair
The T680 is Kenworth’s aerodynamic on-highway workhorse and one of the most common trucks we see. Owners bring them in for PACCAR MX-13 engine faults, aftertreatment and DPF issues, and cab electrical gremlins. We diagnose derate conditions properly and get the emissions system back in spec so you avoid repeat shutdowns on the road.
Kenworth W900 Service and Repair
The W900 is the long-nose classic that owner-operators love to run and own. Because many are high-mileage and heavily used, we handle cooling system upgrades, front axle and steering wear, driveline vibration, and Cummins or PACCAR engine work. We respect these trucks — and the pride you take in yours — and we keep them roadworthy for the long haul.
Kenworth T880 Service and Repair
The T880 is Kenworth’s heavy-vocational truck built for dump, mixer, and construction duty around Adams County. These trucks work hard in dirt and cold, so we focus on suspension and frame components, brake system service, PTO and hydraulic-related issues, and heavy-duty cooling. We keep your vocational truck on the jobsite instead of in a bay.
Kenworth T370 and T270 Service and Repair
The medium-duty T370 and T270 handle box truck, service, and regional delivery work. We service the PACCAR PX engines, brakes, electrical systems, and scheduled maintenance that keep these trucks reliable for daily routes. If it’s part of your delivery fleet, we’ll keep it turning without the downtime that kills your schedule.
Kenworth T800 Service and Repair
The T800 is a versatile heavy-hauler still running strong across Colorado’s energy and construction sectors. Common work includes charge air cooler leaks, engine cooling repairs, driveline service, and air system troubleshooting. We handle the tough diagnostic jobs that a general shop won’t touch.
Common Issues Across Kenworth Models
No matter which Kenworth you run, certain problems tend to surface as the miles pile up. Here’s what we see most often and how we handle it.
- Emissions and DPF derate: Clogged diesel particulate filters and aftertreatment faults are the number one reason Kenworths get sidelined. We diagnose the root cause and service or clean the system rather than throwing parts at it.
- PACCAR MX engine faults: Sensor failures, fuel system issues, and turbo problems trigger warning lights. We read the codes with proper heavy-duty scanners and confirm the failure before quoting a repair.
- Cooling system stress: Colorado’s 105-degree summers and mountain grades push cooling systems hard. We inspect radiators, charge air coolers, water pumps, and hoses to prevent an overheat that could destroy an engine.
- Air brake and air system leaks: Slow air buildup and pressure loss are safety concerns on any Class 8 truck. We locate leaks and restore the system so you’re never gambling with your stopping power.
- Suspension and steering wear: High mileage takes a toll on kingpins, bushings, and front-end components. Our suspension work keeps your truck tracking straight and safe while towing heavy.
- Electrical and starting problems: Cold snaps and vibration cause connector and battery failures. We trace the fault instead of guessing, so your truck fires up the first time on a freezing Colorado morning.
The Bullet Automotive & Diesel Difference for Kenworth Owners
You’ve got a business to run and a family that depends on it. Here’s what you get every time you bring your Kenworth to us.
- Respects your time with efficient service and honest turnaround estimates
- Protects your wallet with written estimates and zero surprise line items
- Backs its work with a 12 month or 12,000 Mile Warranty
- Knows heavy diesel with ASE Certified Technicians and True Diesel Experience
The goal isn’t a one-time fix. It’s becoming the shop you never have to second-guess again — for your truck today and your whole fleet down the road.
Service Areas We Serve
From our Greeley and Fort Morgan locations, we handle Kenworth repair and heavy diesel service for owner-operators and fleets across the region.
- Commerce City — quick access for fleets running the metro corridor
- Henderson — trusted diesel service just down the road
- Lochbuie — heavy-duty repair for local haulers
- Thornton — dependable Class 8 truck maintenance
- Todd Creek — straight-shooting diesel diagnostics nearby
- Reunion — reliable fleet and owner-operator support
Schedule Your Kenworth Service Today in Greeley and Fort Morgan, CO
When your Kenworth is down, every hour counts. Bring it to a shop that knows heavy diesel and shoots straight about what it needs. Our ASE Certified Technicians are ready to get you diagnosed, repaired, and back on the road.
Bullet Automotive & Diesel
Greeley: 624 13th St., Greeley, CO 80631 · 970-415-8018
Fort Morgan: 100 Walnut St., Fort Morgan, CO 80701 · 970-867-2519
Call us now at 970-415-8018 or request a free quote online. We always shoot straight — and we’ll keep your Kenworth working as hard as you do.