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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSBUICK1987CENTURY CUSTOM, 4D SEDAN, 2.5 RREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMV6/V8 PFI COMPONENT TESTMODEL IDENTIFICATION
1987 Buick Century Custom, 4D Sedan, 2.5 R
Model Identification
1987 Buick Century Custom, 4D Sedan, 2.5 RSECTION Model Identification
NOTE:
The following conditions must be met before testing: Engine at operating temperature, Engine in closed loop operation, Engine idling ("Engine Run" column), Test terminal NOT grounded, and Scanner or ALDL tool NOT installed.
Repair procedures in this article are sometimes identified by a specific body code. The following table lists GM division, model name, and body types that apply to the body codes.
MODEL IDENTIFICATION
| Body Type & GM Division | Model Name | |
|---|---|---|
| "A" Body | ||
| Buick | Century | |
| Chevrolet | Celebrity | |
| Oldsmobile | Cutlass Ciera, Cutlass Cruiser | |
| Pontiac | 6000 | |
| "F" Body | ||
| Chevrolet | Camaro | |
| Pontiac | Firebird | |
| "J" Body | ||
| Buick | Skyhawk | |
| Cadillac | Cimarron | |
| Chevrolet | Cavalier | |
| Oldsmobile | Firenza | |
| Pontiac | Sunbird | |
| "L" Body | ||
| Chevrolet | Beretta, Corsica | |
| "P" Body | ||
| Pontiac | Fiero | |
| "W" Body | ||
| Buick | Regal | |
| Oldsmobile | Cutlass Supreme | |
| Pontiac | Grand Prix | |
| "Y" Body | ||
| Chevrolet | Corvette | |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.