Is it worth repairing or replacing the transmission on a 2021 GMC Sierra 2500?

As a general rule of thumb, a transmission replacement on a 2021 GMC Sierra 2500 (full-size truck segment, vehicle value roughly $17,571–$22,363) is usually worth it when the installed cost stays under about $8,985 — roughly 45% of what the vehicle is worth.

What years of GMC Sierra 2500 does a remanufactured or new transmission fit?

Based on vendor-verified fitment data across 49 listed transmissions, remanufactured and new transmissions for this model cover the 1999–2004 model years. Always confirm your exact VIN or engine/transmission code before ordering, since fitment can vary by submodel or engine.

2021 GMC Sierra 2500 Transmissions

Remanufactured transmissions that fit the 2021 GMC Sierra 2500. Each unit below is matched to this vehicle, warranty-backed, and shipped with freight quoted at checkout from Peak Powertrain.

Available Transmissions (11)

OE + 6L90 Remanufactured Automatic Transmission
Price
$2,890.00
Engine:
6.6L
Condition:
remanufactured
OE + 6L90 Remanufactured Automatic Transmission
Price
$2,890.00
Engine:
6.6L
Condition:
remanufactured
Remanufactured Transmission T6L90E6620T4A
Price
$2,625.00
Condition:
remanufactured

2021 GMC Sierra 2500 Transmissions

Available Transmissions (11)

OE + 6L90 Remanufactured Automatic Transmission

OE + 6L90 Remanufactured Automatic Transmission

Remanufactured Transmission T6L90E6620T4A

2021 GMC Sierra 2500 Transmission Market Context

Is replacing the transmission worth it?

Frequently Asked Questions

Remanufactured Transmission

Remanufactured Transmission

6L90 Remanufactured Automatic Transmission

6L90 Remanufactured Automatic Transmission

6L90 Remanufactured Automatic Transmission

6L90 Remanufactured Automatic Transmission

Used Transmission

Other GMC Sierra 2500 Years