Cooper Diesel Repair

Call Directions

Cooper Diesel Repair Specializing in light duty diesel truck repair--Ram Cummins, Ford Powerstroke, GM Duramax.

Services Offered--Computer diagnostics, Transmission & drivetrain repair, Computerized wheel alignment, Heating & A/C, Engine & Fuel system diagnostic & repair, New tire mounting & balancing

🛻 MAINTENANCE MONDAYTow regularly?Your truck works harder than one that spends its life running empty.Towing places addi...
10/19/2026

🛻 MAINTENANCE MONDAY
Tow regularly?
Your truck works harder than one that spends its life running empty.
Towing places additional demands on the:
🔧 Engine
⚙️ Transmission
🌡️ Cooling system
🛑 Brakes
🛞 Tires
A working truck deserves a maintenance schedule that reflects how it's actually being used.

When you spend money with a locally owned business, you're supporting people who live and work right here in your commun...
10/18/2026

When you spend money with a locally owned business, you're supporting people who live and work right here in your community. Every appointment, referral, Facebook share and recommendation matters.

Thank you for supporting Cooper Diesel Repair❤️

🔋 COLD WEATHER IS COMINGThat battery that seems perfectly fine on a 70-degree afternoon may have a different opinion whe...
10/17/2026

🔋 COLD WEATHER IS COMING
That battery that seems perfectly fine on a 70-degree afternoon may have a different opinion when it's 15 degrees outside. Cold weather is tough on batteries. If yours has been showing signs of weakness, don't wait until the first freezing morning to find out just HOW weak it is.

We sell Interstate Batteries.

🍔🍟 FRIDAY LUNCH SHOUTOUT! 🍟🍔It's Friday, and we're showing some local love to Gibby's in St. Clair! 🙌If you're looking f...
10/16/2026

🍔🍟 FRIDAY LUNCH SHOUTOUT! 🍟🍔

It's Friday, and we're showing some local love to Gibby's in St. Clair! 🙌

If you're looking for a great spot to grab lunch, head over to Gibby's and support a fellow local business!

At Cooper Diesel Repair, we know how important it is to support the hardworking businesses that make our communities great. 💪

📍 Gibby's – St. Clair, MO
🌐 https://gibbysstclair.com/

Shop local. Eat local. Support local. ❤️

Which would you rather own?❤️ A completely restored older pickupOR👍 A brand-new pickup loaded with technologyTell us wha...
10/16/2026

Which would you rather own?
❤️ A completely restored older pickup
OR
👍 A brand-new pickup loaded with technology
Tell us what YEAR truck you'd choose.

This truck was Nathan's Great Grandpa's truck that he drives now. (Current photo and Nathan's Great Grandpa with in October 1998).

1964 F100 that his Great Grandpa bought brand new.

They're not all just work trucks we work on, many of them are so much more. Some of these trucks are used to make memori...
10/15/2026

They're not all just work trucks we work on, many of them are so much more. Some of these trucks are used to make memories like pulling a camper, a boat, or an ATV. It might be your dream truck or just an old farm truck, regardless, we’re here to help keep them running and to last generations. This Ford is going to be a young man's first truck that he inherited from his late father and we feel lucky enough to be the ones to help him get his memories back on the road.

10/15/2026

🐌 TRIVIA THURSDAY
A turbocharger may be called a "snail," but there's nothing slow about what's happening inside it.

Turbochargers can spin at incredibly high speeds while dealing with extreme heat.

That's one reason proper oil and regular oil changes matter so much on turbocharged engines.

🔧 MAINTENANCE MONDAYDiesel owners: don't forget your fuel filter. Modern diesel fuel systems operate at extremely high ...
10/12/2026

🔧 MAINTENANCE MONDAY
Diesel owners: don't forget your fuel filter. Modern diesel fuel systems operate at extremely high pressures with very tight tolerances. Clean fuel matters. A neglected filter isn't worth risking an expensive fuel-system repair. We stock Baldwin and Air Dog here at Cooper Diesel.

10/11/2026

A $20–$50 part can sometimes protect a component worth thousands.
That's why preventative maintenance matters.
Belts. Hoses. Filters. Fluids. Brakes. Batteries.
The boring stuff often prevents the exciting—and expensive—stuff. 😉

You're leaving tomorrow on a 2,000-mile road trip. Which vehicle you've owned in your lifetime are you taking? Not nec...
10/10/2026

You're leaving tomorrow on a 2,000-mile road trip. Which vehicle you've owned in your lifetime are you taking? Not necessarily the fanciest—the one you TRUSTED. Tell us what it was! (We're getting this one all ready to go for a customer)

Address

2528 South Service Road East
Union, MO
63084

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm

Telephone

+16363220020

Website

Alerts

Be the first to know and let us send you an email when Cooper Diesel Repair posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Shortcuts

Share

Category