Fleet PM Checklist: What Every Preventive Maintenance Program Should Include

A complete fleet PM checklist by vehicle class — light-duty, heavy-duty, school bus, and equipment. Use it as a starting point for building or auditing your fleet's PM program.

A PM checklist is the operational core of any preventive maintenance program — the specific list of items a technician checks, inspects, and services at each PM visit. Without a defined checklist, PM services vary in quality and completeness based on whoever is doing the work. With one, every technician runs the same program regardless of experience level, and every service produces a documented, consistent record.

This guide provides PM checklist starting points for the four most common fleet vehicle classes. Use these as templates — adjust for your specific vehicle specifications, manufacturer requirements, and duty cycle conditions.

01 Light-duty vehicle PM checklist

Applies to: cars, vans, pickup trucks, and light SUVs under Class 4. Service interval: every 5,000 miles or 6 months, whichever comes first (adjust for severe duty).

Engine and fluids

• Engine oil: drain and replace, check for discoloration or contamination

• Oil filter: replace at every oil change

• Engine coolant: check level and concentration, inspect for leaks

• Power steering fluid: check level, inspect for leaks

• Brake fluid: check level, note color (dark fluid indicates moisture contamination)

• Windshield washer fluid: top off

• Transmission fluid: check level and condition (full drain service per manufacturer schedule)

Filters

• Air filter: inspect, replace if contaminated or at mileage threshold

• Cabin air filter: inspect and replace per schedule

• Fuel filter: replace per manufacturer schedule

Tires and wheels

• Tire pressure: check and adjust all four tires plus spare

• Tread depth: measure, flag if approaching wear indicators

• Tire condition: inspect sidewalls for cuts, bulges, or damage

• Tire rotation: rotate per schedule, document rotation pattern

• Lug nut torque: verify to specification

Brakes

• Brake pad thickness: measure front and rear

• Rotor condition: inspect for scoring, heat cracks, or minimum thickness

• Brake lines and hoses: inspect for leaks, chafing, or deterioration

• Parking brake: test operation

Lighting and electrical

• Headlights: check aim and function, both low and high beam

• Tail, brake, and turn signal lights: verify operation

• Reverse lights: verify operation

• Warning lights: verify no active dash warnings after service

• Battery: test voltage and load capacity

Safety and operational

• Windshield wipers: inspect blade condition, test operation

• Horn: test operation

• Seatbelts: inspect condition and function

• Mirrors: inspect condition and adjustment

02  Heavy-duty truck PM checklist

Applies to: Class 6–8 trucks, dump trucks, tankers, and large service vehicles. Service intervals are typically shorter in mileage and more complex in scope than light-duty.

Engine and drivetrain (in addition to light-duty items)

• Engine oil: drain and replace with spec oil for engine size and application

• Fuel/water separator: drain water, replace filter per schedule

• Coolant system: check antifreeze concentration, inspect hoses and clamps

• Air dryer cartridge: inspect and replace per schedule

• Differential fluid: check level, drain and replace per interval

• Transfer case fluid: check and replace per schedule

Brakes (air brake systems)

• Air brake chamber: inspect for leaks, cracks, or damage

• Slack adjusters: check adjustment, test auto-slack function

• Brake lining thickness: measure front and rear axles

• Air tank drains: drain moisture from all tanks

• Air system leak check: check for audible leaks, test build-up time

Frame and suspension

• Frame rails: inspect for cracks, corrosion, or loose fasteners

• Leaf springs or air suspension: inspect for cracks, worn bushings, air leaks

• Steering linkage: inspect tie rods, drag links, and steering box for play or wear

• Fifth wheel (where applicable): inspect jaw, locking mechanism, and lubrication

Additional items

• Exhaust system: inspect for leaks, damage, or loose hangers

• DEF/SCR system: check fluid level, inspect for fault codes or warning indicators

• PTO system (where applicable): inspect operation and fluid

03  School bus PM checklist additions

School buses require all light or heavy-duty items appropriate to the chassis, plus these bus-specific items:

• Emergency exits: test all emergency door and window exits for proper operation and latching

• School bus warning system: test activation of stop arm, crossing gate, warning lights, and alternating flashers

• Passenger door: inspect operation, seals, and safety interlock

• Interior safety: inspect handrails, seat condition, and floor condition

• Fire extinguisher: verify charge and accessibility

• First aid kit: verify contents and accessibility

• Body condition: inspect for structural damage, rust, or loose panels

04  Non-road equipment PM checklist

Applies to: generators, air compressors, pumps, trailers, mowers, and similar equipment. Service is triggered by engine hours rather than mileage.

• Engine oil: drain and replace per hour interval

• Oil filter: replace at each oil change

• Air filter: inspect and replace per hours or condition

• Spark plugs (gasoline engines) or glow plugs (diesel): inspect per manufacturer schedule

• Fuel system: inspect for leaks, check fuel filter

• Hydraulic fluid (where applicable): check level and condition, replace per interval

• Belts and drive systems: inspect tension and condition

• Battery: test and clean terminals

• Cooling system: check coolant level and hose condition

• Safety systems: test all safety shutoffs and emergency stops

05  Making your PM checklist digital

A paper PM checklist is better than no checklist, but it has limits: technicians can't easily be held accountable for skipped items, records aren't searchable, and there's no connection between the inspection result and a work order if something is found that needs attention.

"Nothing gets lost and nothing gets skipped without being documented." — EKOS Fleet

In EKOS, PM service checklists are built into work orders — when a PM work order is generated for a scheduled service, the relevant checklist items are attached. Technicians complete the checklist on any phone or tablet, flag any items needing follow-up, and close the work order with the completed record permanently attached to the asset. Nothing gets lost and nothing gets skipped without being documented. EKOS Preventive Maintenance

Frequently asked questions

What should be on a fleet PM checklist?

A complete fleet PM checklist covers engine and fluid checks, filter inspection and replacement, tire and brake inspection, lighting and electrical verification, and any vehicle-class-specific items (air brakes for heavy-duty, school bus safety systems, equipment-specific components). The exact items depend on vehicle class and manufacturer specifications.

How often should fleet vehicles be serviced?

Light-duty vehicles typically require PM every 5,000 miles or 6 months. Heavy-duty trucks have more frequent and more complex service requirements, typically every 10,000–15,000 miles for major PM services. School buses often follow state-mandated inspection schedules. Non-road equipment is serviced by engine hours. All intervals should be adjusted for severe duty conditions.

THE BOTTOM LINE

Build your PM service checklists directly into EKOS work orders.

So technicians complete the right checklist on every job, from any device, with results permanently attached to the asset record.

ONE PLATFORM, FUEL AND FLEET

Put your PM checklists in EKOS.

Build your PM service checklists directly into EKOS work orders — so technicians complete the right checklist on every job, from any device, with results permanently attached to the asset record. Start your 30-day free trial.

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