Chevrolet & GMC Truck Repair & Service

Chevy Silverado and GMC Sierra trucks have a loyal following for their proven performance and durability. At Performance Authority, we provide specialized service and repair for the full range of GM trucks. Whether you drive a hard-working Silverado 2500 HD with a Duramax or a versatile Sierra 1500, our Bend-based team has the expertise to keep you on the road. 

Duramax Diesel & Allison Transmission Specialists

The Duramax diesel engine and Allison transmission combination is legendary. We are the trusted experts in Bend for all Duramax repair and maintenance needs.

  • Expert Duramax Repair: We service all generations, from the LB7 to the L5P, addressing common issues like injector failures (“fuel knock”), fuel filter housing leaks, glow plug problems, and CP4 injection pump issues on newer models.
  • Allison Transmission Service: We understand the importance of proper maintenance for the Allison transmission. We perform fluid and filter changes, diagnostics, and repair to ensure smooth shifting and long life.

If you’re searching for expert Duramax repair in Bend, your search ends here.

LS & LT V8 Gas Engine Experts

The Chevy LS and modern LT V8s are legendary for their power and potential, but they have unique complexities that demand true expertise. Performance Authority is Central Oregon’s premier independent shop for mastering these engines. We go far beyond the basics to solve their most notorious problems and unlock their full performance capabilities. We specialize in:

  • Active/Dynamic Fuel Management (AFM/DFM) Solutions: This is our specialty. Whether you’re facing lifter failure and engine ticking or want to prevent it, we offer both expert repair and complete AFM/DFM delete solutions to permanently improve your engine’s reliability and performance.
  • High-Performance Engine Upgrades: As our name suggests, we are leaders in V8 performance. We offer everything from mild to wild: Performance Camshaft Installation, Supercharger & Turbocharger Packages, Long-Tube Headers & Performance Exhaust Systems.
  • Advanced Engine Tuning: Custom ECU tuning to optimize fuel/air ratios, improve throttle response, and maximize horsepower and torque after modifications.
  • Meticulous Engine Maintenance: Trust us for expert care that protects your investment, including specialized services like intake valve carbon cleaning for direct-injection (LT) engines.

Complete Care for Your Silverado or Sierra

We are a full-service repair shop for GM’s light-duty and medium-duty truck platforms.

  • HD Platform Services: We address common issues on 2500/3500 trucks, including steering components (pitman/idler arms), transfer case service, and heavy-duty brake repair.
  • 1500 Platform Services: From suspension work to resolving electrical issues, we are your one-stop shop for Silverado and Sierra 1500 repair.

Schedule Your GM Truck Service Today

For professional Chevrolet and GMC truck repair in Bend, trust the experienced technicians at Performance Authority. Contact us to book your appointment. 

Can’t find the auto service you’re looking for?

At Performance Authority, our team combines decades of hands-on experience with the latest tools and diagnostics to deliver comprehensive care for your truck — whether it’s gas or diesel. From routine maintenance and brake jobs to advanced engine repairs, driveline service, electrical troubleshooting, and heating & A/C repair, we handle it all under one roof. As a family-owned shop built on trust, quality, and transparency, we’re here to keep your truck running strong — mile after mile.

541 537 8832

FAQs

For most diesel trucks, we recommend full maintenance every 5,000 to 7,500 miles, depending on usage and driving conditions. Regular upkeep—including oil changes, filter replacements, fluid checks, and inspections—keeps your diesel running stronger, longer.

Our transmission service includes fluid inspection and replacement, filter changes, diagnostics, and full rebuilds or replacements if needed. Whether you’re dealing with slipping gears or delayed shifting, we’ll restore smooth performance. 

Common signs include uneven tire wear, bouncing after bumps, steering instability, or a rough ride. We inspect shocks, struts, springs, and bushings—then repair or upgrade your suspension for better handling and durability. 

We inspect pads, rotors, calipers, brake fluid, and lines for wear or leaks. Whether you need a basic pad replacement or a full brake system overhaul, we ensure your truck stops safely and reliably every time. 

Warning lights, poor fuel economy, rough idling, or lack of power are all signs your engine needs a checkup. We use advanced scan tools and hands-on testing to pinpoint issues—no guesswork involved.

Diesel engines run hotter and under more pressure than gas engines, making clean oil essential. Routine oil and filter changes reduce wear, boost efficiency, and extend engine life—especially if you haul or tow frequently.

We perform a full visual and mechanical inspection—covering the engine, transmission, suspension, brakes, tires, HVAC, and more. You’ll get a detailed report so you can buy with confidence or walk away informed.

Yes. We provide customizable fleet services to keep your vehicles on the road and out of the shop. From regular oil changes to DOT inspections and major repairs, we tailor our service to your business needs.

We offer diesel tuning, cold air intakes, exhaust enhancements, suspension lifts, and more. Whether you want more towing power or a better ride, we’ll build your truck the way you need it to perform.

If your cab won’t warm up in winter, your A/C blows warm in summer, or your engine is overheating, it’s time for HVAC service. We inspect compressors, radiators, belts, hoses, and thermostats to keep things cool—or warm.