Remanufactured GMC Transmissions for Real-World Reliability

From Sierra fleets to Yukon daily drivers, your customers count on GMC vehicles to work hard. When a transmission fails, they can’t afford second-guess solutions — and neither can your shop.

That’s why ACE remanufactures GMC transmissions built to perform from day one. No guesswork. No comebacks. Just solid builds, fast shipping, and nationwide support that puts your team in control.

GMC Transmission Failures You See Every Week

You know the pattern:

  • 6L80 / 6L90 torque converter failures and TCC shudder
  • 4L60E slipping, hard 1-2 shifts, or loss of 3rd gear
  • 10L80 delayed engagement or harsh downshifts
  • 4L80E line pressure loss in heavy-load situations
  • 6T70/75 3-5-R wave plate failure causing loss of reverse or slipping in 3rd and 5th

These aren’t flukes — they’re common wear points that cost you hours on the bench and customer trust at the counter. We fix that.

What Makes Our GMC Reman Units Different

  • Fully remanufactured — not patched or rebuilt
  • 100% dyno tested before it leaves our facility
  • Upgraded hard parts & OE corrections built in
  • Included with Mobil 1 synthetic transmission fluid
  • Same-day shipping available on most models
  • 3-year, unlimited mileage warranty with no fine print

GMC Models We Commonly Support

Our builds cover the most popular GMC vehicles on the road today:

  • Sierra 1500 / 2500 / 3500
  • Yukon / Yukon XL / Denali
  • Savana Vans (2500 / 3500)
  • Acadia (select years)
  • Canyon (earlier models)
  • Envoy / Terrain

Have a specific drivetrain or customer build? Let us check fitment fast and get your quote started.

Why Shops Stick with ACE

  • ✅ Fewer comebacks — proven dyno-tested performance
  • ⏱️ Save hours per job vs. internal rebuilds
  • ☎️ Direct tech line when you need quick install help
  • 🔁 Warranty is transferable — helps you close customer sales
  • 💲Lower-cost 18-month option available for tighter budgets

Built Right. Backed Nationwide.

You don’t need to chase cores, deal with questionable warranties, or reflash anything. Just get the build, bolt it in, and move on to the next ticket.

The ACE Warranty

  • ✔️ 3-Year / Unlimited Mileage standard
  • ✔️ Parts, labor, shipping & Mobil 1 fluid included
  • ✔️ Nationwide support for you and your customers
  • 💲 18-month budget option available for cost-sensitive projects

Ready to Order Your Next GMC Transmission?

👉 Check availability now
👉 Request a quote in under a minute
👉 Or call and talk through your exact needs

Get A Quote

We’re here to help your shop win more work — and waste less time doing it.