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.
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HOMESERVICE MANUALSPONTIAC1989GRAND PRIX V6-191 3.1LREPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTENGINETUNE-UP AND ENGINE PERFORMANCE CHECKSTECHNICAL SERVICE BULLETINS
1989 Pontiac Grand Prix V6-191 3.1L
Tune-up and Engine Performance Checks: Technical Service Bulletins
1989 Pontiac Grand Prix V6-191 3.1LSECTION Technical Service Bulletins
- Customer Interest
- By Symptom
- All Technical Service Bulletins
- Engine - Miss, Hesitation, or Roughness
- Engine - Miss, Hesitation, or Roughness
- Engine - Diagnosing Intermittent Idle Speed Increases
- PROM - Cold Start or Decel Stall or Tip-in Hesitation
- Spark Plug - Torque Specification Update
- Warranty - Air Cleaner Assembly Returns
- Engine, A/T - Shift/Driveability Concerns/MIL ON
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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.