HVAC & Exhaust Repair // South Dakota
Driver comfort and emissions compliance both run through HVAC and exhaust. We service AC systems, fix heater cores, and repair DPF, DEF, and EGR problems that cause regens, derates, and warning lights.
Symptoms We See
- ▸AC blowing warm
- ▸Heater cold or weak
- ▸Frequent failed regens
- ▸DEF system faults
- ▸Loud or rattling exhaust
What's Included
- ✓AC diagnosis, recharge, and component replacement
- ✓Heater core and blend door service
- ✓DPF cleaning and replacement
- ✓DEF system repair
- ✓Exhaust pipe and clamp service
Why It Matters
Derated trucks don't make money. A driver in a hot or freezing cab makes mistakes. Fixing HVAC and exhaust on schedule protects revenue and your driver.
Why Choose 1776
Dealer-Level Diagnostics
Real scan tools for every major heavy-duty platform - not generic readers.
Experienced Techs
Heavy-duty diesel specialists who've seen it before and know how to fix it right.
Honest Communication
Clear estimates, no upsells, and a call before any scope change.
Fast Turnaround
Six bays and parts relationships that keep your truck moving, not parked.
Frequently Asked Questions
Can you clean a clogged DPF?+
Yes - ultrasonic cleaning and replacement when cleaning isn't enough.
Why does my truck keep going into regen?+
Usually a sensor, EGR, or injector issue causing soot to build up faster than normal. Diagnostics will find it.
Do you recharge AC?+
Yes - leak test first, then recharge with the correct refrigerant.
Related Services
Diagnostics & Electrical Repair
Fast, accurate fault-code analysis and electrical troubleshooting.
Learn More →Cooling System Repair
Radiators, water pumps, thermostats, and full coolant service.
Learn More →Preventive Maintenance
Scheduled PM service that keeps trucks out of the breakdown lane.
Learn More →Truck Down? Call Now.
Give us your fault codes or symptoms. You get a straight answer in plain language.