Your Western Star Deserves More Than Just Another Repair Shop
You bought a Western Star because it’s built like a tank and it earns its keep every single day. So when that dash lights up on I-76, or the truck starts down on power hauling a full load, you feel it in your gut. Every hour that hood is up is an hour you’re not making money, and your crew is standing around waiting on an answer you don’t have. You need a shop that knows heavy diesel iron inside and out — not one that’s going to guess, stall, and hand you a surprise bill.
Note: Large vehicles like this are serviced at our Greeley and Fort Morgan locations. Our Brighton shop handles cars and light trucks.
That’s what we do at Bullet Automotive & Diesel at our Greeley and Fort Morgan locations. Whether you run a 4700, a 4900, a 5700XE, or the newer 49X, our ASE Certified Technicians bring True Diesel Experience to every job. We shoot straight, tell you what’s a safety must-fix versus what can wait, and get your Western Star back to work fast.
Why Western Star Owners in Greeley and Fort Morgan Choose Bullet Automotive & Diesel
We Speak Your Language, Not Mechanic Jargon
You know your way around an engine, so we’re not going to talk down to you or bury the truth in shop-talk. We tell you exactly what’s wrong in plain English and back it up with what we found on the truck.
- A straight diagnosis with zero fluff and no guessing
- Clear priority tiers — fix now for safety, coming soon, or down the road
- Photos and findings from our comprehensive multi-point inspection
- Real updates while your truck is in the bay, not silence
When your income depends on uptime, you can’t afford a shop that leaves you in the dark. We keep you looped in so you can plan your week around the real timeline.
Western Star Expertise Without Dealership Pricing
Heavy Detroit and Cummins power, air brakes, EGR and DPF systems — these aren’t driveway jobs anymore. Our technicians train on modern diesel systems and carry the diagnostic tools to read your truck properly the first time.
- and TEXA diagnostic equipment for heavy-duty trucks
- Fleet maintenance and repair specialists who understand downtime costs
- True Diesel Experience on Detroit, Cummins, and heavy drivetrains
- Dealership-level capability without the walking-wallet treatment
You get the deep knowledge of a specialist shop and the fair, honest pricing of an independent. That’s the trade you’ve been looking for.
Transparency That Rebuilds Trust
You’ve been burned before — quoted for parts you didn’t need, back in two weeks for a problem someone missed. We built this shop to be the one you never have to second-guess.
- Written estimates before any wrench turns
- No upsells — we fix what needs fixing, not what pads the ticket
- Every repair backed by our 12 month or 12,000 mile warranty
- Clean, comfortable waiting areas at all of our locations
We treat your truck like it’s the backbone of your livelihood, because we know it is. Shoot straight with us, and we’ll shoot straight with you every time.
Comprehensive Western Star Repair Services
Western Star Maintenance Services
Preventive maintenance is the cheapest insurance you can buy against roadside breakdowns. Our scheduled vehicle maintenance keeps your Western Star running predictable, mile after mile.
- Diesel oil and filter changes on the correct interval
- Fuel and air filter replacement
- Coolant system flush and inspection
- Comprehensive multi-point vehicle inspections
- DPF and emissions system service
- Belt, hose, and driveline inspection
- Battery and charging system testing
Colorado’s swings from below freezing to 105 degrees are brutal on cooling and battery systems, so we check the whole truck, not just the reason you came in.
Western Star Diagnostic and Repair Services
When something’s actually wrong, our vehicle diagnosis and repair pinpoints the real fault instead of throwing parts at a code. We back it with full diesel repair services for heavy trucks.
- Check engine and dash warning light diagnostics
- Diesel engine repair and rebuild
- Turbocharger repair and replacement
- Fuel system and injector service
- EGR valve and DPF repair or cleaning
- Air and hydraulic brake repair
We diagnose it right the first time so you’re not back in the bay in two weeks and out another day of work.
Western Star Specialty Services
Western Star trucks pull heavy in tough conditions, so they need service that goes beyond the basics. Keep the cab cool with our auto AC and heating repair during those 105 degree summer runs.
- Heavy-duty suspension and steering repair
- Diesel electrical and charging system repair
- Cooling system, radiator, and water pump service
- Fleet maintenance programs for multi-truck operations
- Clutch and driveline overhaul
Whether it’s one truck or a small fleet, we build a service plan around your route, your loads, and your budget.
Model-Specific Western Star Expertise
Western Star 4700 Service and Repair
The 4700 is the workhorse of vocational fleets — dump, mixer, and construction duty. Hard-service trucks like these hammer their suspensions, brakes, and cooling systems. We handle the heavy PTO and hydraulic setups these trucks carry and keep the driveline tight so it survives the jobsite pounding day after day.
Western Star 4900 Service and Repair
The 4900 is built for the toughest applications, from logging to heavy haul. These trucks live under load, so we watch closely for clutch wear, differential fatigue, and cooling strain. Our technicians address the frame-mounted components and heavy drivetrain that keep a 4900 pulling when lesser trucks quit.
Western Star 5700XE Service and Repair
The aerodynamic 5700XE is the long-haul highway rig, engineered for fuel economy over the miles. On these trucks we focus on emissions systems, fuel delivery, and the electronics that manage efficiency. When a DPF, EGR, or sensor fault kills your fuel numbers or triggers derate, we get to the root cause fast.
Western Star 49X Service and Repair
The 49X is the modern severe-service platform packed with advanced electronics and driver-assist systems. That complexity means diagnostics matter more than ever, and we’ve got the and TEXA tools to read it properly. We service the newer emissions, electrical, and safety systems while keeping the heavy-duty fundamentals dialed in.
Western Star 47X Service and Repair
The 47X blends vocational toughness with updated driver comfort and technology. These trucks juggle construction and regional hauling, so their cooling, brakes, and suspension take a beating. We keep the whole truck inspected and prioritized so a small issue doesn’t sideline you mid-contract.
Common Issues Across Western Star Models
Every Western Star is built to last, but heavy loads and hard miles bring predictable problems. Here’s what we see most and how we handle it.
- DPF and EGR clogging: Emissions systems load up with soot over time, triggering derate and warning lights — we clean, repair, or replace so you keep your power.
- Cooling system strain: Colorado’s elevation changes and 105 degree heat push radiators and water pumps hard, so we pressure-test and flush the whole system.
- Fuel injector and delivery faults: Rough idle, loss of power, and hard starts often trace to injectors or fuel supply — we diagnose the real cause instead of swapping guesses.
- Air brake wear: Constant heavy stopping wears pads, chambers, and valves — we inspect the full air system for safe, reliable braking.
- Suspension and steering fatigue: Jobsite pounding loosens bushings, joints, and steering components, and we tighten it all up before it becomes a highway hazard.
- Electrical and sensor faults: Modern trucks throw codes for everything, so we use heavy-duty diagnostics to separate real failures from nuisance faults.
The Bullet Automotive & Diesel Difference for Western Star Owners
You’ve handed your livelihood to the wrong shop before. Here’s what changes when you bring your Western Star to us.
- Respects your time with fast, efficient service that gets your truck back to work
- Respects your wallet with written estimates and zero surprise line items
- Respects your knowledge with plain-English answers, never talking down to you
- Respects your trust by fixing it right the first time and standing behind the work
Our goal isn’t a one-off repair — it’s becoming the shop you never second-guess, for your truck and your whole fleet. That’s the kind of relationship that lets you book jobs and load the family without wondering what the truck’s going to do next.
Service Areas We Serve
We keep Western Star trucks running across the Front Range and eastern plains with honest, straight-shooting diesel repair.
- Greeley — our Greeley and Fort Morgan shops
- Greeley — full heavy-duty diesel service to the north
- Fort Morgan — serving the eastern plains and I-76 corridor
- Fort Lupton — trusted repair for local haulers and fleets
- Commerce City — quick access for area contractors
- Henderson — dependable service for working trucks
Schedule Your Western Star Service Today
When your Western Star is down, every hour counts — so let’s get it diagnosed and back to work. Call the team at Bullet Automotive & Diesel and we’ll shoot straight with you from the first phone call.
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
See what other truck owners say on our Greeley reviews page, then call us at 970-415-8018. We always shoot straight — and we’ll keep your Western Star pulling.