Transmission · Manual 5-speed · 6.0L
400-RL01254B Transmission interchange
400-RL01254B is a Redline transmission interchange code that fits 18 vehicles from 2001–2007, option Manual 5-speed · 6.0L.
INFERRED
Inferred: matched by vehicle specs. Likely right; confirm before you sell.
Fits
| Year | Make | Model | Option |
|---|---|---|---|
| 2001 | GMC | Sierra 2500 | Manual 5-speed · 6.0L |
| 2002 | GMC | Sierra 2500 | Manual 5-speed · 6.0L |
| 2003 | GMC | Sierra 2500 | Manual 5-speed · 6.0L |
| 2004 | GMC | Sierra 2500 | Manual 5-speed · 6.0L |
| 2001 | GMC | Sierra 2500HD | Manual 5-speed · 6.0L |
| 2002 | GMC | Sierra 2500HD | Manual 5-speed · 6.0L |
| 2003 | GMC | Sierra 2500HD | Manual 5-speed · 6.0L |
| 2004 | GMC | Sierra 2500HD | Manual 5-speed · 6.0L |
| 2005 | GMC | Sierra 2500HD | Manual 5-speed · 6.0L |
| 2006 | GMC | Sierra 2500HD | Manual 5-speed · 6.0L |
| 2007 | GMC | Sierra 2500HD Classic | Manual 5-speed · 6.0L |
| 2001 | GMC | Sierra 3500 | Manual 5-speed · 6.0L |
| 2002 | GMC | Sierra 3500 | Manual 5-speed · 6.0L |
| 2003 | GMC | Sierra 3500 | Manual 5-speed · 6.0L |
| 2004 | GMC | Sierra 3500 | Manual 5-speed · 6.0L |
| 2005 | GMC | Sierra 3500 | Manual 5-speed · 6.0L |
| 2006 | GMC | Sierra 3500 | Manual 5-speed · 6.0L |
| 2007 | GMC | Sierra 3500 Classic | Manual 5-speed · 6.0L |
OEM numbers
How to verify
- Check the ID tag or transmission code against the OEM numbers above.
- Decode the VIN to confirm year, model and powertrain.
- Compare the part physically: mounts, connectors and dimensions.
Information is a guide only. Verify fitment before sale. No warranty is given.
Last updated 2026-10-11