3 Rivers Diesel and Repair

It’s honestly surprising how many grid heater failures we see on 6.7L Cummins trucks .. . even for a small shop like ours.
This is just a quick glimpse of what comes through every month.

If you haven’t addressed yours yet, now’s the time.
Parts are in stock… get scheduled before it becomes a bigger problem.

ALLISON 10L1000 TRANSMISSION SERVICE & UPGRADES

Found in 2020+ Chevy Silverado 2500HD / 3500HD 6.6L Duramax trucks, the Allison 10L1000 is a good transmission — but it does have known valve body issues as mileage heat and use build over time.

We offer complete Allison 10L1000 services, including:
• Valve body upgrade services using the proven kit designed to correct the known 10L1000 valve body issue
• Full transmission service & inspection
• Large-capacity deep pan upgrades available
• OEM fluid
• OEM filter & pan gasket

Schedule your Allison service now

Complete 6.7L Power Stroke Engine Replacement 🔧
From turbocharger to drain bolt — every component brand new, bolt-in ready.
✅ Full fuel system included
✅ Backed by parts & labor warranty

Jump into Spring with a Fresh Start!
Like this 2016 Duramax for:
• Engine oil service
• Transmission service
• Fuel filter

Ready to gear up for the season?
Contact us today to schedule your spring maintenance!

We build in-house, and offer drop-in ready Performance Transmissions designed for heavy towing or high horsepower performance. Using industry-leading parts, we focus on strength, reliability, and durability to handle whatever you throw at it.
• Perfect for heavy-duty use or chasing more power
• Offering up to a 3-year / 150,000-mile warranty

Reach out to learn more – let’s get your truck ready for the road!