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Home >> GMC >> 1984 >> Caballero Base, 3.8 9, 250C/M31 >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - V6 & V8 Diesel >> Testing >> HPCA Temperature Switch

HPCA Temperature Switch

The temperature switch (California vehicles only) is calibrated to open the HPCA circuit at about 125°F (52°C). Replace switch if defective.

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