What are the opening hours?

Monday 8am - 12pm 1pm - 5pm Tuesday 8am - 12pm 1pm - 5pm Wednesday 8am - 12pm 1pm - 5pm Thursday 8am - 12pm 1pm - 5pm Friday 8am - 12pm 1pm - 5pm

GJDiesel

Directions Website Contact the business

G & J Diesel has been serving Billings, Montana and the surrounding area for over 20 years.

G&J Diesel Sales & Service | Est. 1993
Your source for quality Duramax, Power Stroke & Cummins diesel parts, performance upgrades, and expert diesel service.
🇺🇸 WE SHIP NATIONWIDE!
🚀 Our NEW online parts store is LIVE at GJDIESEL.com! We specialize in the Ford Powerstroke, GM Duramax and Dodge Cummins diesel trucks. From maintenance and repairs to power and performance,
G & J has the knowledgeable staff to assist you. G & J Diesel is also a direct distributor of many of the products we sell. We offer an extensive line of products and services to meet all of your diesel automotive needs.

10/20/2026

🎃 Calling All Truck & Car Enthusiasts! 🏁

Our friends over at JJM Performance are hosting their 3rd Annual Trunk or Treat this Saturday, October 24th, from 3–6 PM!

Whether you're into diesel trucks, race cars, classics, or just looking for some Halloween fun with the family, head over and check it out!

Let's show some support for a fellow local automotive business and make this a great turnout!

📍 1420 Minnesota Ave, Billings, MT

🎃🚘 Share it and spread the word!

10/19/2026

Great talent. Always welcome. 💪

At G&J Diesel, we’re always interested in meeting good people who take pride in their work and want to help our team grow.

Bring your skills, your ideas, and your drive. Let’s see what we can build together.

Interested in career opportunities? Let’s talk!
📞 Call or text: 406-248-6366
📧 [email protected]
🌐 gjdiesel.com
📍 Billings, Montana

Know someone who would be a great fit? Tag them or share this post!

09/28/2026

Your truck works hard. Give it parts you can count on.

G&J Diesel stocks OEM and quality aftermarket parts for Cummins, Duramax, and Power Stroke—with knowledgeable people to help you get the right part.

From filters and maintenance supplies to injectors, turbos, and clutches, our parts counter is open to truck owners, independent repair shops, and fleets.

✅ Trusted brands, stocked right here in Billings
✅ Parts available over the counter for your own repairs
✅ Nationwide shipping available

Motorcraft • ACDelco • Bosch • Garrett • Holset • BD Diesel • FASS • S&S • PPE • ARP—and more.

Need a part? Call or text for pricing and availability.
📱 406-248-6366
🌐 GJDIESEL.com

The brands you trust. The diesel people you know.

08/12/2026

We want to wish our fearless leader a Happy Birthday! It figures I'd pick the one photo without his flip flops! 🤣

07/02/2026

Today is a bittersweet day here at G&J Diesel.
One of our young apprentices, who started with us at just 15 years old as our “Head Floor Sweeper,” has now graduated high school and is headed into the armed services.
Over the years, we’ve had the privilege of watching him grow, learn, and push himself far beyond where he started. His progress has been incredible, and he has developed into a young man with solid A-tech level knowledge and a work ethic we are truly proud of.
He has been a great part of our team, and he will be greatly missed around the shop. More than anything, we are thankful for the time we had with him and excited to see where this next adventure takes him.
From all of us at G&J Diesel — congratulations, thank you, and we wish you the very best in your future and your service to our country.

06/05/2026

We Need These Gone — Stage 6 Allison Transmissions
We have two Stage 6 4x4 Allison transmissions sitting here ready to ship or install.
Both are dyno tested, include the converter, and still come with warranty.
$5,000 each
Available:
2001–2002 Stage 6 4x4 Allison
Part # 128136200
2004.5–2005 Stage 6 4x4 Allison
Part # 128136202
Core required. Freight and core not included.
A good rebuildable core must come back.
These are priced to move. Great deal for someone needing a built Allison for their Duramax.
Call G&J Diesel Sales & Service
406-248-6366
Billings, MT

Address

1745 Main Street
Billings, MT
59105

Opening Hours

Monday	8am - 12pm
	1pm - 5pm
Tuesday	8am - 12pm
	1pm - 5pm
Wednesday	8am - 12pm
	1pm - 5pm
Thursday	8am - 12pm
	1pm - 5pm
Friday	8am - 12pm
	1pm - 5pm

Website

http://www.gjdiesel.com/

Alerts

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