Guillen Automotive

Guillen Automotive We are a family-owned business. Need an auto repair? Give us a call at 830-643-4991

When you have your vehicle repaired at our facility, you can expect to be treated like family - that means honesty and integrity first and foremost.

This car came in for a full inspection, and during our checkup, we found the spark plugs covered in oil as well as engin...
09/23/2026

This car came in for a full inspection, and during our checkup, we found the spark plugs covered in oil as well as engine oil leaking from the tailpipe. This can be a sign of a PCV system issue, and in this case, we found the PCV valve was the culprit.
When we went to remove the PCV hose, the top portion of the valve actually came off with the hose—not a good sign.
We had to get a little inventive to remove the bottom half, but with a little persuasion, we got it out. 😅

Afterward, we installed the new PCV valve and cleaned the oil off the spark plugs to help prevent potential misfires.
This is a good reminder that many components on a vehicle are made of plastic and can deteriorate over time. Things like hose connectors, PCV valves, thermostat housings, and other plastic components can eventually become brittle, crack, or fall apart.

Preventative inspections can help catch these problems before they leave you stranded—or turn a relatively simple repair into a much bigger one.
Sometimes, it’s not a matter of if an aging plastic component will fail, but when.⌛

Have you noticed any of these smells coming from your car? Maybe it’s time to take a look!🧐Every picture you see is from...
09/15/2026

Have you noticed any of these smells coming from your car? Maybe it’s time to take a look!🧐

Every picture you see is from a real situation we’ve had come through our shop. No stock photos here! 📸We’ve seen these issues firsthand, and we’re sharing them to help our customers recognize when something might need attention.

If you’ve noticed a strange smell coming from your vehicle, don’t ignore it! Give us a call, stop by, or drop a comment below.
We’re always happy to answer your questions!❓😄

So proud of our Matadors! We're excited for this upcoming season! The weather cancellation was disappointing, but there'...
09/01/2026

So proud of our Matadors! We're excited for this upcoming season! The weather cancellation was disappointing, but there's always next time. We'll be praying for clear skies at the next game. 🌞

Holiday Notice! The shop will be closed for Labor Day. Regular hours will resume the following day. We hope everyone has...
09/01/2026

Holiday Notice! The shop will be closed for Labor Day. Regular hours will resume the following day. We hope everyone has a safe and blessed holiday.

We had a work truck come in and noticed some shocks were missing. There was a notable difference in the vehicle's stabil...
08/18/2026

We had a work truck come in and noticed some shocks were missing. There was a notable difference in the vehicle's stability compared to a regular truck. You can see not only that the shock has been torn off, but that an attempt to repair the connection was made. For being a work truck, this didn’t bother the customer too much. However, it is something a regular everyday vehicle would need to be aware of and definitely take care of.

Why are shocks important?

Shocks are an important part of the suspension, so it's hard to miss when they're failing. Like a spring in a mattress, the suspension is responsible for absorbing the weight and pressure. This control helps keep your ride smooth and less bouncy. When driving over potholes or cracks in the road.

If your vehicle is bouncing a little bit, that is normal, but if you are stuck in a vehicle that is jarring you back and forth, that is an issue. Bad shocks can contribute to uneven tire wear and longer stopping distances. Does some of this sound relatable to you?

Call to schedule an appointment today!

🚗 Sometimes a “temporary fix” can create more problems than it solves.This vehicle came in for a water pump leak. During...
08/12/2026

🚗 Sometimes a “temporary fix” can create more problems than it solves.
This vehicle came in for a water pump leak. During our inspection, our technician noticed dried silicone all around the water pump housing.
After talking with the customer, we found out he had attempted a creative DIY solution. Coolant had been leaking onto the serpentine belt, causing it to occasionally slip off the pulleys. Frustrated with the problem—and trying to avoid the costly repairs—he used silicone to create a makeshift barrier and redirect the leaking coolant away from the belt.
Unfortunately, the fix could only last so long.
When we repaired the water pump, we also had to carefully remove the excess silicone. Leaving it behind could have allowed it to melt or drip onto the exhaust and potentially create another problem.
We understand wanting to save money. That's why we didn't charge the customer extra for the cleanup. We got the vehicle repaired properly and helped get him back on the road.
💡 The lesson? If you notice a leak, don't wait until a temporary fix turns into a bigger repair. Sometimes addressing the problem early can save you time, money, and headaches.
📞 Have a leak or another vehicle problem? Bring it to us before a small problem becomes a big one.

This vehicle came in last week for some repair work. Another mechanic shop recommended us for the work because they did ...
08/07/2026

This vehicle came in last week for some repair work. Another mechanic shop recommended us for the work because they did not have the updated tools and equipment for the job.

The customer informed us of a brake light that had come on and a slight drag they had noticed when driving.
Upon further inspection, our mechanic noticed the rear side caliper had locked up. The damage was so significant that the brake pad had been completely rubbed off and the rotor had been ground down to a centimeter less than its opposite side.

Calling all teachers!📢Our shop is looking forward to supporting our schools in new ways this year. We've already sponsor...
08/04/2026

Calling all teachers!📢
Our shop is looking forward to supporting our schools in new ways this year. We've already sponsored the Seguin High School football team this season and hope to add another school to the list next season!

We have been able to help many teachers in our community and surrounding areas, and we'd love to expand our reach even further. Whether you're a teacher who has done business with us before or you have friends or family members who are teachers, we look forward to seeing which schools you represent!🤩😎

Call to schedule your appointment today! Phone #: (830) 643-4991
07/30/2026

Call to schedule your appointment today!
Phone #: (830) 643-4991

Stop by today or call to schedule your appointment for August!
07/28/2026

Stop by today or call to schedule your appointment for August!

Address

13305 S. State Highway 123
Seguin, TX
78155

Opening Hours

Monday 7:30am - 4:30pm
Tuesday 7:30am - 4:30pm
Wednesday 7:30am - 4:30pm
Thursday 7:30am - 4:30pm
Friday 7:30am - 4:30pm

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