Parts That Keep South Texas Working
From 1/2 ton to 18 wheelers we are the one and only heavy duty parts store in Atascosa County. Commercial fleet solutions, fast deliveries, and hard to find parts…that’s us.

Delivery Available
Within 50 Miles

Heavy Duty
Specialists

Commercial &
Fleet Accounts
Stop Guessing.
Get the Right Part the First Time.
Whether you’re broken down at 2am or planning for maximum up-time, Dornak has a solution for that. We are here to grow YOUR business. Let us be your partners.

Delivery Within 50 Miles
You make money when your trucks are running. We can do deliveries up to 50 miles with no issues. Call us(button) and we can get you moving A.S.A.P.

Heavy Duty Specialists
We have 100+ years of experience backing our counter. Our guys know how to look up heavy duty & off road vehicles. We use online tools right beside old-school catalogs… and we don’t stop looking until we find your answer.

Commercial & Fleet Accounts
Our whole philosophy for business centers around providing solutions that work for your business. A nation wide chain simply will not give you the specialized advice we will. We go beyond parts and into strategy because when you’re running, so are we.
South Texas’ #1 Heavy Duty Parts Shop
If it hauls, pulls, drills, fracks, or works we stock for it.
- 18 Wheelers & Commercial Fleets
- Oilfield & Frac Equipment
- Off-Road & Heavy Machinery
- Half-Ton Pickups & Work Trucks
- Tractors
- UTV’s.
We’re the only heavy duty, off road auto parts retailer within 100 miles south of San Antonio.
Testimonials
Old school style parts store with an old school attitude. Went in to get parts for my semi truck and was promptly greeted and attended to. The salesman (possibly the owner) was very knowledgeable. They have a lot of truck parts in there. Will definitely be returning.
Very helpful friendly staff. More than I thought the price should be but not out of line. Part was in stock so time is more important than money!
Excellent customer service. By a employee that has worked there for 2 months. He went out of his way to help me find a specific nut for a bolt on my Kenworth. I didn’t catch his name but he is an asset to Carquest.
Excellent service. Wes and Karen did a great job of helping me get oxygen and acetylene plus torch. Nice to go someplace where service is great.
Claim Your Free Filter Survey For Your Fleet
- We come to your yard. We catalog every filter on every rig. You get a custom stocking program — so the right part is always on the shelf before you need it.
- ✓ Know exactly what every rig needs — by name or number
- ✓ We stock your shelf. Weekly or bi-weekly.
- ✓ Shorthand ordering — "Rig 4, oil & air" and we know it
- ✓ Volume pricing that undercuts the chains
- ✓ Free delivery up to 20 miles
- ✓ VIN-level accuracy on every lookup
- ✓ We source hard-to-find parts for you
- One requirement: 24-month filter commitment with Dornak. Most fleets already qualify with what they’re buying today.
“We aren’t your average auto parts store”
Our roots are
planted in the old school rural world where you needed access a little bit of
everything. Our staff, stocked parts, and mindset match that.

Heavy Duty & Off Road Focused
We are powered by 2 of the largest distributors in North America. Automann is an absolute power house when it comes to heavy duty and Carquest via Advance Auto Parts is known for their prowess in the automotive world. At Dornak Auto Parts we combine these two to give you the best of both worlds.

Professional Tools Designed To Work All Day, Every Day… Like You
We have a massive selection of mechanic centric Milwaulkee tools. We do special orders and can take care of any warranties if you bought the tool through us.

We Make Custom Hydraulic Hoses
Whether it’s hydraulic, D.O.T. lines, air brakes, AC lines, grease hose, or pressure washing hoses, we make them in house. We can even aid in setting up a new hydraulic system. Powered by Gates, a legend in the hydraulic world.
What’s a Filter Survey?
Value $1,999.00
Your Cost: FREE with a 24 month commitment to buy filters exclusively through Dornak Auto Parts
We analyze
We start with a simple questionnaire that is run through our proprietary database. Then, because computers never catch eveverything, we send a team out to manually check, verify, and cross your filters in person, by hand.
Lock In Prices
We strategize with you to get you as many discounts as our vendors allow while also minimizing your downtime with our remote stocking program in your parts room.
Create Your Folder:
You will end up with a folder that you, our salesmen, and our countermen can all access and edit. This is your value lever that keeps giving for the life of your equipment.
We Bring The Parts To You
Our fleets enjoy on demand or scheduled delivery
depending on volume. Broke down on the road or need a one off part? We
charge a small fee and it’s all cheaper than a mobile mechanic will ever be!
Why Dornak Beats the Chains

Dornak Auto Parts
- We have a staff with 100+ years of experience.
- Familiar with D.O.T. requirements
- Can stock specific items just for your needsn
- Our success depends on yours. That makes us highly motivated.
- We make money through solutions, not sales games.
- Our warehouse has way more inventory in many different industries than any of our chain based competitors.

Big Box Chains
- Doesn’t care if you sink or swim.
- Have a counter that is always changing personnel.
- Ask year, make, model, trim for everything. That’s all they know.
- They don’t provide strategy. Just parts.
- No fleet strategy
Testimonials
Their very courteous & very helpful people w/ a friendly & homely atmosphere.
They got it they know parts inside out help you load also very helpful
Great spot for truck parts friendly staff and had everything i needed.
The good of it is the day have everything that you need for cars and big trucks
Let’s Partner & Grow Together:
Our belief is that if we help enough people
win, we win too. Join us in shaping our future together.
Revolutionizing Auto Parts Experience
Your trusted local auto parts store
Get dependable parts, real expertise, and honest service