The service and repair manual for the 2003 Buick Regal — 3.8L V6 and 3.8L V6 engines, 2 trims. Matched to this exact model year, so the specifications and sequences are the ones Buick published for your car, not figures carried over from a neighbouring year.
01 / FitmentWhat this manual covers
| Model year | 2003 |
|---|---|
| Engines | 3.8L V6 — 232 cu in, OHV, supercharged 3.8L V6 — 232 cu in, OHV |
| Trims | GS Sedan 4-Door · LS Sedan 4-Door |
| Federal record | 4 recalls · 139 complaints · 215 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 2003 Regal manual
03 / ContentsSections in the manual
- Quick Lookups 389
- Engine Performance 2,649
- Accessories & Equipment 2,945
- General Information 2,060
- Body & Frame 1,528
- Heating, Ventilation & A/C (HVAC) 391
- Brakes 598
- Restraints 539
- Drivelines & Axles 515
- Steering 207
- Electrical 1,424
- Suspension 183
- Engine Mechanical 533
- Transmission 609
- High Side 195
- Low Side 42
04 / Known issuesRecalls on federal record for the 2003 Regal
- Engine And Engine Cooling — engine · 15V701000Engine oil that drips onto the hot surface of the exhaust manifold may result in a fire.
- Steering · 08E063000If the weld fails, loss of steering could result, possibly resulting in a vehicle crash.
- Steering · 09E005000A broken steering knuckle could result in loss of steering control and a possible crash without warn.
- Engine And Engine Cooling · 09V116000If the manifold is hot enough and the oil runs below the heat shield, it may ignite into a small fla.
Owners have filed 139 complaints and Buick has issued 215 technical service bulletins for the 2003 Regal. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 2003 Regal manual
Is this manual specific to the 2003 Regal?
Yes. It is the OEM manual matched to the 2003 model year, covering the 3.8L V6 and 3.8L V6 across the GS Sedan 4-Door, LS Sedan 4-Door trims. Specifications and procedure sequences are the ones Buick published for this year.
What 2003 Regal problems does it help with?
4 recalls are on federal record for the 2003 Regal, covering engine and engine cooling, steering. The manual carries the manufacturer's diagnostic and repair procedures for those systems; the recall repairs themselves are done free by Buick dealers.
Does it include 2003 Regal wiring diagrams?
Yes — the complete wiring diagrams for the 2003 build, alongside repair procedures, specifications and diagnostics.
Is it a subscription?
No. $29.99 once and the manual is yours. It is a digital manual — nothing ships; access details arrive by email after checkout and it works on any device.
RelatedOther Regal years and 2003 Buick models
2004 Regal · 2002 Regal · 2001 Regal · 2000 Regal · 1999 Regal · 1998 Regal · 1997 Regal · all 30 years
2003 Buick Century · 2003 Buick LeSabre · 2003 Buick Park Avenue · 2003 Buick Rendezvous · every 2003 model