Fleet Preventive Maintenance in Colorado Springs: A Schedule You Can Actually Use
Updated: Sep 29
If you run five pickups, a couple of diesel service trucks and a box truck, you don't need a 40-page maintenance program. You need a schedule your drivers will follow, records that hold up if anyone asks for them, and a shop that catches small problems before they become a truck on a tow hook.
Westco Automotive & Truck Repair services fleets across Colorado Springs, Fountain, Security-Widefield, Monument and Pueblo, including gas pickups, Power Stroke, Duramax and Cummins diesels, and Isuzu NPR box trucks. We also do DOT inspections in-house. Here's the framework we use to set up a small fleet's preventive maintenance (PM) plan.
What should a small fleet's maintenance schedule include?
It should include three things for every vehicle: a mileage interval, a time interval, and, for diesels and trucks that idle a lot, an engine-hour interval. Whichever comes first triggers the service. That catches the truck that sits most of the month and the one that idles all day on a job site.
The numbers below are typical starting points only. Follow your manufacturer's schedule for each vehicle. Many newer trucks have oil-life monitors that factor in idle time and operating conditions, and many manufacturers publish a separate severe-service schedule for towing, heavy loads, lots of idling and dusty roads. A lot of fleet work around Colorado Springs, with towing, idling and mountain grades, fits that severe-service description.
Gas pickup / van
Oil & filter (PM-A): Per oil-life monitor, or roughly every 5,000–7,500 miles or 6 months
Inspection + fluids (PM-B): Every second or third PM-A
Major service (PM-C): Annually, or per the manufacturer's major-service mileage
Diesel pickup (Power Stroke, Duramax, Cummins)
Oil & filter (PM-A): Per oil-life monitor, or roughly every 5,000–7,500 miles, 6 months or a set number of engine hours
Inspection + fluids (PM-B): Every second PM-A, including fuel filters and water separator per the manual
Major service (PM-C): Annually, or per the manufacturer's major-service mileage
Box truck (Isuzu NPR and similar)
Oil & filter (PM-A): Per the manufacturer's schedule for your duty cycle, commonly tracked by miles and engine hours
Inspection + fluids (PM-B): Every second PM-A
Major service (PM-C): Annually, alongside the annual DOT inspection if it applies
Again: these are starting points to build from, not specs. Your manufacturer's schedule, your owner's manuals and how your trucks are actually used should set the final numbers. We'll help you set them truck by truck.
What are PM-A, PM-B and PM-C?
They're service levels that stack on top of each other. Many fleets use this approach so every visit has a clear checklist, and the deeper services happen on a predictable rhythm.
PM-A — the regular service. The quick, frequent visit.
Oil and filter change
Top off fluids
Tire pressure and tread check
Lights, wipers, horn and mirrors
Quick look at brakes, belts, hoses and leaks
Scan for stored fault codes
PM-B — PM-A plus a closer inspection.
Brake measurements, not just a glance
Steering and suspension components
Air filter and cabin filter
Fuel filters and water separator on diesels, per the manual
Battery and charging system test
Driveline, U-joints and exhaust
On diesels: DEF system, DPF status and any regen-related codes
PM-C — PM-B plus major fluid and component service.
Coolant condition and cooling system pressure test
Transmission and differential fluids, per the manual
Detailed frame, undercarriage and corrosion check
Full brake service as needed
A good time to line up the annual DOT inspection for trucks that need one
What DOT paperwork does my fleet need?
If your vehicles are covered by the federal motor carrier safety rules, you need three kinds of maintenance records: an annual inspection, driver vehicle inspection reports when defects are found, and ongoing maintenance records for each vehicle. Whether the rules apply to a given vehicle depends on the vehicle and how you operate it. We're not lawyers, so check FMCSA's guidance or ask a compliance professional if you're unsure.
Here's what the regulations in 49 CFR Part 396 say, in plain terms.
Annual inspection (49 CFR 396.17)
Each covered vehicle has to pass a periodic inspection of the components listed in the regulation's Appendix A at least once every 12 months. The inspection gets documented with a report, or a sticker or decal showing the inspection date, the carrier's name and address, and the vehicle's identification. The carrier keeps the report for 14 months where the vehicle is housed or maintained (396.21).
Westco performs DOT inspections in-house. Scheduling it alongside a PM-C means one trip instead of two.
Driver vehicle inspection reports, or DVIRs (49 CFR 396.11)
At the end of each day's work, drivers of covered property-carrying vehicles prepare a written report on the vehicle if they found or were told of a defect. The report covers items like service brakes, parking brake, steering, lights and reflectors, tires, horn, wipers, mirrors, coupling devices, wheels and rims, and emergency equipment.
Key points:
For property-carrying vehicles, a report isn't required if no defect is found or reported.
Before the vehicle is driven again, the carrier has to repair any listed defect likely to affect safe operation, and certify on the report that it was repaired or that repair wasn't necessary.
The carrier keeps the report and the certifications for three months.
Maintenance records (49 CFR 396.3)
Carriers must "systematically inspect, repair, and maintain" the vehicles under their control. The records include each vehicle's identification, the schedule for inspections and maintenance, and a record of the work done with dates. They're kept where the vehicle is housed or maintained for one year, and for six months after the vehicle leaves your control.
For more on the inspection itself, read our post on DOT inspections in Colorado Springs.
What does Colorado Springs do to fleet vehicles?
It works them harder than a flat, sea-level route would. Four local conditions deserve a spot in your PM plan.
Altitude
At about 6,000 feet, engines breathe thinner air, turbos work harder, and cooling systems carry more heat load. Clean air filters, tight boost systems and healthy cooling systems matter more here. Diesels on short in-town routes also tend to need more attention to their DPF and regen behavior.
Magnesium chloride
The City of Colorado Springs uses liquid magnesium chloride as a de-icer, along with treated salt and a sand-salt mix. Research done for the Colorado Department of Transportation found magnesium chloride can be more corrosive than regular salt in humid conditions. It dries on metal, then re-dissolves when moisture returns, over and over.
On many trucks, that shows up on brake lines, fuel lines, wiring connectors, frames and trailer hitches. Build these into your plan:
Regular undercarriage washes through the winter, not just in spring
A corrosion check at every PM-B and PM-C: brake and fuel lines, frame, wiring connectors, and trailer plugs
Brake hardware inspection for rust-jacking and seized slides
Mountain grades and brakes
Routes over Monument Hill, up Ute Pass or down to Pueblo put real work on brakes and transmissions. Fleets running those grades often see faster brake wear than the same trucks on flat routes. Measure brakes at every PM-B rather than waiting for noise.
Winter comes early
A cold snap can show up in October. We suggest a September winter-prep pass for every vehicle:
Battery load test
Glow plug or grid heater check on diesels
Block heater and cord check
Fuel filters and water separator drained or serviced
Coolant freeze protection
Tires and wiper blades
Heater and defroster
Do I need fleet software, or can my shop be my system?
For many small fleets, the shop can be the system. Fleet software earns its keep when you have lots of vehicles, several locations, or telematics that feed mileage and engine hours automatically. With a handful of trucks, a simple setup often works better:
One shop keeps the service history for every unit, by VIN or unit number
Due dates are written down for each truck by miles, months or hours
DOT inspection dates are tracked alongside the PM schedule
Records are easy to pull if you ever need to show them
Whatever you use, the goal is the same: every truck has a written schedule, every service is documented, and nothing depends on one person's memory.
At Westco, we'll work with you to set a schedule that fits each vehicle and how you use it. Learn more on our fleet service page, our Isuzu NPR service page and our diesel service page.
FAQ
How often should a fleet vehicle get a full inspection?
Many fleets do a detailed inspection at every PM-B and a full one annually. Vehicles covered by FMCSA rules need the annual periodic inspection at minimum.
Can we do our own PM-A services and use a shop for the rest?
Yes, many small fleets do. Just log every service, including the ones you do in-house, so your records stay complete.
Do you service mixed fleets of gas and diesel vehicles?
Yes. We work on gas and diesel pickups and box trucks, including Ford, GM, Ram and Isuzu.
Bring it to Westco
Westco Automotive & Truck Repair is a female-led Colorado Springs shop, founded in 2018. Our techs are ASE-certified, we're CARFAX Top Rated and RepairPal Certified, and our repairs carry a 24-month / 24,000-mile parts and labor warranty. We do DOT inspections in-house, and we don't do emissions deletes.
Related Westco services
Let's set up a schedule that fits your fleet. Book my FREE Inspection or call (719) 591-7743. We're at 1130 Valley St, Ste A/B, Colorado Springs, open Monday–Friday, 9–5.
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