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Home >> Chevrolet >> 1995 >> Lumina Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 3.1L >> ECM/Pcm Code Charts >> Codes 98 & 99, Invalid Pcm Program

Codes 98 & 99, Invalid Pcm Program

Attempt to reprogram PCM. If Code resets, replace PCM. Reprogramming of PCM requires special equipment.

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