2003 BUICK Regal L67/L36 (W-body)
W-body / Sedan / Wagon / North America primarily; some global right-hand drive versions for specific markets
L67L36Registro exacto de año/versiónGold
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Intake manifold leaks on supercharged L67
- Transmission shift issues on automatic 4T65-E
- Electrical gremlins in body control module
First checks
- Check coolant and oil levels for leaks
- Listen for supercharger noise on GS trim
- Inspect automatic transmission fluid condition
Antes de cambiar piezas
- Save fault codes and freeze-frame data before clearing anything.
- Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
- Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.
Important notes
- The 2003 Buick Regal was sold primarily in North America; some RHD versions were made for export but limited in volume.
- GS trim with supercharged L67 engine offers enhanced performance but shares most drivetrain components with base Regal.