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 MANUALSPONTIAC1983GRAND PRIX BASE, 5.0 HREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALMECHANICAL5.0L (305") V8 - VINS [H,S]ENGINE IDENTIFICATION

1983 Pontiac Grand Prix Base, 5.0 H

Engine Identification

1983 Pontiac Grand Prix Base, 5.0 HSECTION Engine Identification

NOTE: For engine repair procedures not covered in this article, see ENGINE OVERHAUL PROCEDURES - GENERAL INFORMATION article in the GENERAL INFORMATION section.

Engine may be identified from the Vehicle Identification Number (VIN) stamped on a metal tab located on top of instrument panel at lower left of windshield. The VIN number contains 17 digits. The 8th digit identifies the engine and the 10th digit establishes the model year.

ENGINE IDENTIFICATION CODES

Application

Engine Code

VIN Code

4-Bbl.

LG4

CFI ⁽¹⁾

LU5

⁽¹⁾	CFI is Crossfire Injection, a type of TBI.

RENDER: 1.0x

NO RELATED

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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.