Allegiant Diesel & Auto

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Allegiant Diesel & Auto Contact information, map and directions, contact form, opening hours, services, ratings, photos, videos and announcements from Allegiant Diesel & Auto, 53238 US/131, Three Rivers, MI.
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2018 Ram getting switched over to Schaeffer's this morning!
10/17/2026

2018 Ram getting switched over to Schaeffer's this morning!

Brand new wheels/tires front and rear today.Extended rear wheel studs and half inch spacers to run wider rear wheels/tir...
10/16/2026

Brand new wheels/tires front and rear today.

Extended rear wheel studs and half inch spacers to run wider rear wheels/tires 🔥

First round has arrived! • AMS Oil 100% Synthetic HD Diesel Oil15W-40, 10W-30, 5W-40 1 quarts, 1 gallons, 2.5 gallonsEAO...
10/14/2026

First round has arrived!

• AMS Oil 100% Synthetic HD Diesel Oil

15W-40, 10W-30, 5W-40
1 quarts, 1 gallons, 2.5 gallons

EAO80 oil filters for 6.7 Cummins
EAO52 oil filters for 01-19 6.6 Duramax
EAO98 oil filters for 6.7 Ford

• Schaeffers stock will be increasing soon

15W-40 and 10W-30 1 gallon jugs in stock currently

• PPE

314000767 - 6.7 Ford oil filters
114000555 - 01-19 Duramax high efficiency oil filters
114000750 - 20-26 Duramax high efficiency oil filters

Fuel coolant relocation pump kits on the way for you 20+ L5P guys so you can get rid of that dinky filter!

Of course all your OEM filters as well.

1974 Plymouth Duster in for some repairs this week.What a sweet ride!
10/14/2026

1974 Plymouth Duster in for some repairs this week.

What a sweet ride!

2019 Ford F350 6.2L Gas110K Miles- BDS Suspension 2" leveling kit and dual steering stabilizers with nitro series shock ...
10/14/2026

2019 Ford F350 6.2L Gas
110K Miles

- BDS Suspension 2" leveling kit and dual steering stabilizers with nitro series shock absorbers
- Motorcraft drag link assembly
- Motorcraft exhaust manifold
- Rear brake rotors, pads, seals, and bearings
- Transmission fluid, filter, and gasket service
- Motorcraft headlight assemblies

Truck is sitting on a brand new set of 37X12.50 Nitto Trail Grapplers

[email protected]
(269)506-6136

The good stuff
10/13/2026

The good stuff

Duramax fuel hoses on the engine are known to crack with age and cause a crank no start symptom. Merchant Automotive fue...
10/13/2026

Duramax fuel hoses on the engine are known to crack with age and cause a crank no start symptom.

Merchant Automotive fuel hose kits for LB7 to LML trucks in stock.

Merchant Automotive LB7 injector cups and o-rings in stock

Merchant Automotive 04.5-10 metal return line fitting kit in stock

2020 Ford F350 6.7L- S&S DCR injection pump conversion- Fleece Performance fuel filter housing upgrade - Fleece Performa...
10/13/2026

2020 Ford F350 6.7L

- S&S DCR injection pump conversion
- Fleece Performance fuel filter housing upgrade
- Fleece Performance fuel return line fitting upgrade

You've heard us talk about it time and time again.
You see the posts... don't wait until we have it here for the repair.

[email protected]
(269)506-6136

Just a heads ups to all our customers. We have a new key drop box now. It is located just to the right of the front door...
10/12/2026

Just a heads ups to all our customers. We have a new key drop box now. It is located just to the right of the front door.

There will be drop off forms in the top for you to fill out and put your key into.

Thank you everyone and have a great week!

No one else locally is going to have what you need to fix your truck reliably. You will get OEM or aftermarket junk part...
10/12/2026

No one else locally is going to have what you need to fix your truck reliably.

You will get OEM or aftermarket junk parts from local parts stores. We want to fix your truck with the much needed upgrades so you do not have issues again.

Not all repairs require an upgrade, but when they do... do you want to wait weeks for it to come in? Especially in a pinch? I assume not. Our goal is to give you quality options in a timely manner. No, not every aftermarket option that exists are we going to have in stock. We are focusing on the common failures and 911 emergency upgrades to keep you going reliably.

As we add things to our inventory I will continue to keep everyone informed!

Address

53238 US/131
Three Rivers, MI
49093

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Telephone

+12695066136

Website

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