Chevrolet Truck & Duramax Repair in Washington, UT
Professional Silverado 1500, 2500HD and 3500HD, Colorado, Tahoe and Suburban repair, including 6.6L Duramax and Allison transmission service, in Washington, Utah.
MST Motorsports credentials
- ASE Master Certified Technicians
- Hunter HawkEye Elite Alignment
- In-House Shock Rebuilds
- 80+ Years Combined Experience
- Gas & Diesel
- Family-Owned in Washington Since 2020
MST Motorsports provides professional Chevrolet truck and SUV repair in Washington, Utah, for the Silverado 1500, 2500HD and 3500HD, Colorado, Tahoe and Suburban, from Duramax and Allison service on HD trucks to lifter diagnosis on 5.3L and 6.2L half-tons. Our factory-trained, certified technicians have more than 80 years of combined experience, and qualifying repairs are backed by our 36-month/36,000-mile nationwide warranty. Lift and alignment work is handled at the same location, minutes from St George.
We service trucks, SUVs, Jeeps, Broncos and daily drivers, gas and diesel, from Ford, Chevrolet, GMC, Ram, Toyota, Honda and Nissan. If your vehicle is not listed here, call (435) 256-8899.
Platforms We Service
Suspension and lift work runs through truck services, diesel work through diesel repair, and ride-height correction through alignment service.
6.6L Duramax Diesel Work
L5P Duramax service runs to the severe-duty schedule for trucks in this climate, covering oil to Duramax specification, fuel filter service, coolant, DEF diagnostics, Allison 10-speed fluid, transfer case and both differentials.
The L5P uses a Denso injection pump rather than the CP4 found on earlier trucks, and injector balance rates, rail pressure and fuel filter condition remain the measurements that matter on a high-mileage truck. Water-in-fuel warnings are diagnosed at the source.
DPF regeneration cycles cut short by dust and short trips leave soot loading high, so our technicians read regen history and soot load with scan data and service the EGR and intake tract to factory specification.
On the gas side, Active Fuel Management and Dynamic Fuel Management lifter collapse is the most common 5.3L and 6.2L failure, diagnosed with compression testing, chassis-ear inspection and live scan data before any teardown.
Lift Shocks and Alignment
Leveling kits, 2 to 6 inch lifts and coilover conversions fit Silverado 1500, 2500HD and Colorado ZR2 platforms, with shock valving matched to the weight the truck carries and the terrain it sees.
Alignment follows the install on the top-of-the-line Hunter HawkEye Elite, because caster restoration and tie rod geometry are what keep a lifted GM truck from wearing the inside edges off a new set of tires.
Maintenance Intervals
5,000 to 7,500 miles
Oil and filter to Duramax or gas specification, tire rotation, courtesy inspection with photos and video.
15,000 miles
Duramax fuel filter service, engine air filter, cabin filter, DEF quality check, transfer case fluid inspection.
30,000 miles
Allison 10-speed or 8L90 fluid and filter, brake fluid flush, front and rear differential fluid, coolant condition check.
60,000 miles
Driveline fluids replaced, EGR and intake service on diesel, spark plugs on gas V8, front axle service on 4x4.
Tow and dust duty
Air filter and fuel filter checked at every oil service on trucks running dirt roads or towing to Sand Hollow.
These are the intervals a Silverado in Washington County heat and tow duty runs on. , or call or text (435) 256-8899 with your year and mileage.
GM's published normal and severe-duty figures for the Duramax and Allison are laid out in our Duramax and Allison service interval article.
What We See in Southern Utah
Serving Washington, St George and Hurricane, plus Ivins, Santa Clara, La Verkin and Leeds. Pricing depends on the platform and the mileage, so call for your vehicle.
Book Your Service
Repair, maintenance, lift and alignment in one shop in Washington, Utah.
Side-by-side and UTV service at our Washington, Utah location.
Polaris, Can-Am and Kawasaki side-by-side service, including in-house shock rebuilds, clutch and CVT work and suspension.
Side-by-side and UTV serviceFrequently Asked Questions
Do you service the 6.6L L5P Duramax?
Yes. L5P Duramax service covers oil to Duramax specification, fuel filter service, coolant, DEF system diagnostics, Allison 10-speed fluid, transfer case and both differentials. We work to the severe-duty schedule because heat, dust and towing put most local HD trucks in that column.
Can you diagnose AFM lifter failure on a 5.3L Silverado?
Yes. Collapsed lifters and camshaft damage from Active Fuel Management are among the most common half-ton failures in Washington County. Diagnosis runs on compression testing, chassis-ear listening and live scan data, so any teardown starts with a known cause.
Does the Allison transmission need fluid service?
Yes. Fluid and filter service in the 30,000 mile range keeps an Allison 10-speed healthy behind a truck that tows in heat, because fluid degrades faster on grades and at weight than the light-duty schedule assumes. Shift complaints are diagnosed with live temperature and pressure data first.
Do you align a lifted Silverado or Colorado ZR2?
Yes. Post-lift alignment is performed on the top-of-the-line Hunter HawkEye Elite with caster restored and tie rod geometry set for the new ride height. Uneven inside-edge wear on a Trail Boss or ZR2 usually traces to caster left at the stock number after the lift went on.
Book Service
Call the shop with your year, mileage and what the truck is doing. We book service in Washington, Utah, minutes from St George.