Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Buick: 1991
1991 BuickSECTION 1991
- Century
- LeSabre V6-231 3.8L VIN C SFI
- Park Avenue V6-231 3.8L VIN L SFI
- Park Avenue Ultra V6-3.8L SC VIN 1
- Reatta V6-231 3.8L VIN L SFI
- Regal
- Riviera V6-231 3.8L VIN L SFI
- Roadmaster V8-305 5.0L
- Roadmaster Estate Wagon V8-305 5.0L
- Skylark
- Century
- Custom, 2D Coupe, 2.5 R, 125C/MD9
- Custom, 2D Coupe, 2.5 R, 3T40/MD9
- Custom, 2D Coupe, 3.3 N, 125C/MD9
- Custom, 2D Coupe, 3.3 N, 3T40/MD9
- Custom, 2D Coupe, 3.3 N, 440T4/ME9
- Custom, 2D Coupe, 3.3 N, 4T60/ME9
- Custom, 4D Sedan, 2.5 R, 125C/MD9
- Custom, 4D Sedan, 2.5 R, 3T40/MD9
- Custom, 4D Sedan, 3.3 N, 125C/MD9
- Custom, 4D Sedan, 3.3 N, 3T40/MD9
- Custom, 4D Sedan, 3.3 N, 440T4/ME9
- Custom, 4D Sedan, 3.3 N, 4T60/ME9
- Custom, 4D Wagon, 2.5 R, 125C/MD9
- Custom, 4D Wagon, 2.5 R, 3T40/MD9
- Custom, 4D Wagon, 3.3 N, 440T4/ME9
- Custom, 4D Wagon, 3.3 N, 4T60/ME9
- Limited, 4D Sedan, 2.5 R, 125C/MD9
- Limited, 4D Sedan, 2.5 R, 3T40/MD9
- Limited, 4D Sedan, 3.3 N, 125C/MD9
- Limited, 4D Sedan, 3.3 N, 3T40/MD9
- Limited, 4D Sedan, 3.3 N, 440T4/ME9
- Limited, 4D Sedan, 3.3 N, 4T60/ME9
- Limited, 4D Wagon, 2.5 R, 125C/MD9
- Limited, 4D Wagon, 2.5 R, 3T40/MD9
- Limited, 4D Wagon, 3.3 N, 440T4/ME9
- Limited, 4D Wagon, 3.3 N, 4T60/ME9
- Special, 2.5 R, 125C/MD9
- Special, 2.5 R, 3T40/MD9
- Special, 3.3 N, 125C/MD9
- Special, 3.3 N, 3T40/MD9
- Special, 3.3 N, 440T4/ME9
- Special, 3.3 N, 4T60/ME9
- LeSabre
- Park Avenue
- Reatta
- Regal
- Custom, 2D Coupe, 3.1 T, 440T4/ME9
- Custom, 2D Coupe, 3.1 T, 4T60/ME9
- Custom, 2D Coupe, 3.8 L, 440T4/ME9
- Custom, 2D Coupe, 3.8 L, 4T60/ME9
- Custom, 4D Sedan, 3.1 T, 440T4/ME9
- Custom, 4D Sedan, 3.1 T, 4T60/ME9
- Custom, 4D Sedan, 3.8 L, 440T4/ME9
- Custom, 4D Sedan, 3.8 L, 4T60/ME9
- Gran Sport, 2D Coupe, 440T4/ME9
- Gran Sport, 2D Coupe, 4T60/ME9
- Gran Sport, 4D Sedan, 440T4/ME9
- Gran Sport, 4D Sedan, 4T60/ME9
- Limited, 2D Coupe, 3.1 T, 440T4/ME9
- Limited, 2D Coupe, 3.1 T, 4T60/ME9
- Limited, 2D Coupe, 3.8 L, 440T4/ME9
- Limited, 2D Coupe, 3.8 L, 4T60/ME9
- Limited, 4D Sedan, 3.1 T, 440T4/ME9
- Limited, 4D Sedan, 3.1 T, 4T60/ME9
- Limited, 4D Sedan, 3.8 L, 440T4/ME9
- Limited, 4D Sedan, 3.8 L, 4T60/ME9
- Riviera
- Roadmaster
- Skylark
- Base, 2D Coupe, 2.3 D, 125C/MD9
- Base, 2D Coupe, 2.3 D, 3T40/MD9
- Base, 2D Coupe, 2.5 U, 125C/MD9
- Base, 2D Coupe, 2.5 U, 3T40/MD9
- Base, 2D Coupe, 3.3 N, 125C/MD9
- Base, 2D Coupe, 3.3 N, 3T40/MD9
- Base, 4D Sedan, 2.3 D, 125C/MD9
- Base, 4D Sedan, 2.3 D, 3T40/MD9
- Base, 4D Sedan, 2.5 U, 125C/MD9
- Base, 4D Sedan, 2.5 U, 3T40/MD9
- Base, 4D Sedan, 3.3 N, 125C/MD9
- Base, 4D Sedan, 3.3 N, 3T40/MD9
- Custom, 2D Coupe, 2.3 D, 125C/MD9
- Custom, 2D Coupe, 2.3 D, 3T40/MD9
- Custom, 2D Coupe, 2.5 U, 125C/MD9
- Custom, 2D Coupe, 2.5 U, 3T40/MD9
- Custom, 2D Coupe, 3.3 N, 125C/MD9
- Custom, 2D Coupe, 3.3 N, 3T40/MD9
- Custom, 4D Sedan, 2.3 D, 125C/MD9
- Custom, 4D Sedan, 2.3 D, 3T40/MD9
- Custom, 4D Sedan, 2.5 U, 125C/MD9
- Custom, 4D Sedan, 2.5 U, 3T40/MD9
- Custom, 4D Sedan, 3.3 N, 125C/MD9
- Custom, 4D Sedan, 3.3 N, 3T40/MD9
- Gran Sport, 2.3 D, 125C/MD9
- Gran Sport, 2.3 D, 3T40/MD9
- Gran Sport, 2.5 U, 125C/MD9
- Gran Sport, 2.5 U, 3T40/MD9
- Gran Sport, 3.3 N, 125C/MD9
- Gran Sport, 3.3 N, 3T40/MD9
- Luxury, 2.3 D, 125C/MD9
- Luxury, 2.3 D, 3T40/MD9
- Luxury, 2.5 U, 125C/MD9
- Luxury, 2.5 U, 3T40/MD9
- Luxury, 3.3 N, 125C/MD9
- Luxury, 3.3 N, 3T40/MD9
Database: CHARM
CHARM manuals were retrieved from a set of DVDs released in late 2013. These manuals are usually the most detailed for the years in which they're available, but occasionally have missing or cut-off images.
Database: LEMON
LEMON manuals were retrieved in late 2025, so they have more up to date technical bulletins for example. However, they tend to be less detailed for older vehicles.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.