Fleet Maintenance in Denver, Colorado

When you have six trucks and one of them is always in the shop, the shop matters as much as the trucks. The Denver fleet maintenance providers here run PM programs on intervals you set, keep the DOT inspection binder current, and hold the records that keep Colorado enforcement happy. Look for fleet accounts, after-hours drop-off, and shops that will come to your yard.

32Fleet Maintenance Shops
9Open 24 Hours
4.4Average Rating
0Premium Shops

All Fleet Maintenance Shops in Denver

Diesel Repair Denver

Denver, CO
(720) 477-7781
5.0★(6 reviews)
Semi-Truck RepairFleet MaintenanceEngine DiagnosticsDOT InspectionsEmergency Repair +3 more

Straightline Diesel repair and emissions

Denver, CO
(720) 355-7164
4.9★(39 reviews)
Diesel Engine RepairDiesel Specialist

Rev Auto and Truck

Denver, CO
(303) 386-4172
4.9★(270 reviews)
Diesel SpecialistDiesel RepairIndependent ShopHighly Rated

Livina Truck Mechanic

Denver, CO
24/7
(303) 819-7958
4.9★(39 reviews)
Diesel SpecialistOpen 24 Hours

Rocky Mountain Construction Equipment

Denver, CO
(303) 282-1355
4.8★(11 reviews)
Diesel RepairIndependent ShopHighly Rated

All Fleet Services

Denver, CO
24/7
(303) 227-0575
4.8★(64 reviews)
Fleet MaintenanceDiesel SpecialistCommercial & FleetOpen 24 Hours

Denver West Diesel

Denver, CO
(720) 272-0296
4.8★(20 reviews)
Diesel Engine RepairDiesel Specialist

Marcelo's Diesel

Denver, CO
(303) 450-2356
4.8★(23 reviews)
Engine DiagnosticsPreventive MaintenanceDiesel Specialist

Ainsworth Trailer Repair

Denver, CO
(303) 227-9363
4.7★(192 reviews)
Fleet MaintenanceDiesel Specialist

UZ Truck & Trailer Repair INC

Denver, CO
(720) 771-2221
4.7★(87 reviews)
Diesel SpecialistDiesel RepairIndependent ShopHighly Rated

Ramirez Truck and Trailer Repair

Denver, CO
(720) 440-3428
4.7★(35 reviews)
Diesel SpecialistDiesel RepairIndependent ShopHighly Rated

Armageddon Diesel

Denver, CO
(720) 224-1177
4.7★(13 reviews)
Diesel Engine RepairDiesel Specialist

Colorado Chassis Services

Denver, CO
(303) 292-9559
4.6★(63 reviews)
RV RepairDiesel Engine RepairSemi-Truck RepairDiesel Specialist

Mobile Truck Repair Denver

Denver, CO
24/7
(720) 902-8989
4.6★(82 reviews)
RV RepairDiesel SpecialistEmergency RepairOpen 24 HoursMobile Service

Denver Mobile Truck Repair

Denver, CO
24/7
(720) 713-7279
4.6★(11 reviews)
DOT InspectionsMobile ServiceDiesel Engine RepairDiesel SpecialistEmergency Repair +1 more

Quality Mobile Truck Repair

Denver, CO
24/7
(303) 944-5306
4.6★(83 reviews)
Heavy Duty RepairDiesel Engine RepairDiesel SpecialistEmergency RepairOpen 24 Hours +1 more

Wiers Fleet Service & Truck Repair Denver

Denver, CO
(303) 294-0470
4.5★(64 reviews)
Aftermarket PartsBus RepairDiesel Engine RepairHydraulic RepairRV Repair +4 more

Livina Truck Mechanic

Denver, CO
24/7
(303) 819-7958
4.5★(23 reviews)
Diesel Engine RepairDiesel SpecialistOpen 24 Hours

Mobile Wrench Truck Repair

Denver, CO
(303) 650-5902
4.5★(144 reviews)
DOT InspectionsPreventive MaintenanceDiesel SpecialistEmergency RepairMobile Service

Legacy Diesel Repair LLC

Denver, CO
(720) 951-8929
4.4★(8 reviews)
Diesel Engine RepairDiesel Specialist

Alliant Power

Denver, CO
(303) 428-3611
4.4★(91 reviews)
Aftermarket PartsPreventive Maintenance

A&A Fleet Services

Denver, CO
(303) 371-4823
4.3★(3 reviews)
DOT InspectionsDiesel SpecialistCommercial & Fleet

Diesels Only

Denver, CO
(303) 778-6511
4.2★(139 reviews)
Diesel Engine RepairDiesel Specialist

E's Heavy Duty Repair llc

Denver, CO
24/7
(720) 773-0218
4.1★(28 reviews)
Heavy Duty RepairRV RepairDiesel Engine RepairPreventive MaintenanceDiesel Specialist +2 more

Mile High Mobile Mechanic

Denver, CO
24/7
(720) 682-3675
4.1★(106 reviews)
Brake ServiceDiesel SpecialistEmergency RepairOpen 24 HoursMobile Service

Denver Diesel Truck & Trailer Repair

Denver, CO
(720) 452-9898
4.1★(76 reviews)
Fleet MaintenanceSemi-Truck RepairDiesel Specialist

Western Engine Supply

Denver, CO
(303) 286-1903
4.1★(130 reviews)
Diesel Engine RepairDiesel Specialist

J.P. Diesel Repair

Denver, CO
(720) 318-2332
3.9★(30 reviews)
Diesel Engine RepairDiesel Specialist

Denver Pro Mobile Truck & Trailer Repair

Denver, CO
(303) 502-1373
3.7★(3 reviews)
Bus RepairEmergency RepairBrake ServiceTransmission RepairPreventive Maintenance +2 more

ROAD DAWGS FLEET REPAIRS LLC.

Denver, CO
(720) 435-4835
3.5★(8 reviews)
DOT InspectionsMobile ServiceRV RepairDiesel Engine RepairDiesel Specialist +1 more

Mobile Truck Repair Denver

Denver, CO
24/7
(720) 790-3522
2.8★(6 reviews)
Diesel Engine RepairDiesel SpecialistEmergency RepairOpen 24 HoursMobile Service

DPA-DCA- SFM-North campus

Denver, CO
(303) 866-3970
2.5★(2 reviews)
Diesel RepairIndependent Shop

Fleet Maintenance FAQ — Denver, Colorado

What should a preventive maintenance program for a small diesel fleet include?
At minimum: oil and filter service on the manufacturer's hour or mile interval, fuel and air filters, coolant testing, brake and tire inspection, greasing, DEF system checks, and a look at the aftertreatment history. Add the annual DOT inspection for commercial vehicles. A good Denver fleet shop puts this on a calendar per unit and sends reminders so nothing slips.
How do fleet accounts work with Denver diesel shops?
Most fleet shops offer net-30 billing, a single monthly statement, and a negotiated labor rate once you commit a few units. Some include priority scheduling and a loaner or shuttle. Ask what the minimum fleet size is — in Denver that is often as low as three vehicles — and whether they will keep digital service records you can pull for audits.
Is it better to use one shop for everything or split engine, brakes, and trailers between specialists?
For a small fleet, one shop that can do 90 percent of the work — PMs, brakes, electrical, emissions, inspections — is simpler and keeps records in one place. Send the rare rebuild or reefer job to a specialist. Larger Colorado fleets often keep one general fleet shop plus a dedicated trailer and reefer vendor.
What records does Colorado or the DOT expect me to keep for my trucks?
Commercial motor vehicles need a maintenance file per unit showing inspections, repairs, and the annual inspection report, retained for at least a year while the vehicle is in service and six months after. Driver vehicle inspection reports and defect repairs go in the same file. Fleet shops in Denver that work with carriers usually hand you paperwork formatted for exactly this.
Can a fleet shop maintain the diesel pickups and vans in my fleet as well as the big trucks?
Yes, and most prefer it — pickups, service vans, and medium-duty trucks are the bulk of many Denver fleet shops' work. Confirm they carry the scan tools for your engine families (Power Stroke, Cummins, Duramax, plus any Isuzu or Hino cabovers) and that they can handle warranty-compliant service intervals on newer units.