Diesel Truck & Auto Repair in Nampa, ID

When your truck isn't running right, you need a shop that actually knows diesel.

We've built our reputation on honest work, experienced technicians, and repairs that hold up. Whether you're driving a Cummins, Duramax, or Powerstroke, we know what it takes to keep it on the road.


What We Do



Our shop handles the full range of diesel truck and automotive services. We specialize in Turbo Rebuilds and upgrades, with stage 2 and stage 3 options available and a two-year, 24,000-mile warranty on every rebuild. Our Engine Repairs team services drivetrains, transmissions, differentials, steering and electrical systems, and we're one of the few shops in the area that cleans and replaces diesel particulate filters. For day-to-day upkeep, our Regular Maintenance services cover oil changes, brake checks, tuneups, AC service, and more on all makes and models.

We also offer 24/7 Towing Service for diesel pickups, motorcycles, passenger vehicles, and commercial trucks up to Class 4. And for farms, job sites, and fleet operators, our Heavy Equipment and Hydraulic Repair team comes to you, handling hydraulic line replacements, ram cylinder rebuilds, welding repairs, and urgent parts delivery right where your equipment sits.


Serving Nampa and the Treasure Valley



We're located at 2002 West Karcher Rd in Nampa, and we work with customers from Caldwell, Meridian, Boise, Kuna, and throughout Canyon and Ada counties. If you're not sure whether we're the right fit for your vehicle, give us a call. We offer free plug-in diagnostics with no appointment needed, and we can give you an estimate over the phone if you have your VIN or license plate handy.

Gold certified NAPA shop

We're a NAPA Gold Certified shop, which puts us in the top 5% of NAPA AutoCare Centers nationwide. We're also AAA Approved and staffed by ASE-certified and NAPA Master Tech technicians with a combined 110 years of industry experience. When you bring your vehicle to us, you're not getting a guess. You're getting a digital diagnostic scan, a straight answer, and a clear repair plan.

That means we meet or exceed stringent standards for service, cleanliness, and technician expertise.

We offer the 3 year, 36,000 mile warranty that NAPA carries.
Parts and labor for valid repairs.

And because we know repairs can be expensive, we offer 12 months no-interest financing through Synchrony. Ask us about getting pre-qualified before your next visit.

AAA approved shop

Members receive 10% off services and repairs

Turbocharger Repair and Rebuilds in Nampa, ID

Your turbo works hard. On a diesel truck, it's one of the most load-bearing components on the entire engine, and when it starts to go, you'll notice it fast -- sluggish acceleration, white or black smoke, a whining that wasn't there last week. The good news is that most turbocharger problems don't require a full replacement. At Ray's Diesel, our technicians have the experience to diagnose the issue accurately and rebuild or repair your turbo at a fraction of new-unit cost.

We handle everything from basic turbo maintenance and seal replacements to full core rebuilds and performance upgrades. If you're looking to get more out of your truck, we offer Stage 2 and Stage 3 turbo upgrades for drivers who want improved power and efficiency on the road or the job site. Every rebuild we perform is backed by our two-year, 24,000-mile warranty, so you're not just getting the repair -- you're getting the confidence that it'll hold up.

Our technicians work on Cummins, Duramax, and Powerstroke platforms regularly, and we bring that hands-on diesel expertise to every turbo job that comes through the door. No guesswork, no parts-swapping without diagnosis. Just a straight answer and a repair done right.

Ready to get your turbo looked at? Visit our Turbocharger Rebuilds and Upgrades page or call us at (208) 391-6067. No appointment needed for a diagnostic scan.

Why work with us?

At Ray's Diesel & Automotive Repair, we pride ourselves on offering fair and trustworthy services. Our repair shop builds long-lasting relationships with our clients, so they always have a place to get their vehicles worked on.

You can rely on us because we:

  • Have a combined 110 years of industry experience
  • Employ ASE-certified technicians
  • Are a NAPA Truck and Auto Service Center
  • Specialize in diesel repairs and maintenance
  • Provide a three-year, 36,000-mile warranty on all our repairs

Plus, we offer free diagnostic services.