Mechanics

HEATER CORE

1991 Cadillac Seville • V8 FWD Automatic •

How do I replace a heater core in a 1991 Cadillac Seville


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Spear828
December 24, 2010.



HEATER CORE
Removal & Installation

1. Disconnect negative battery cable. Partially drain coolant. Remove glove box and lower sound insulator panel from under right side of dash.

2. Remove programmer and disconnect electrical connectors from BCM. Remove BCM and BCM mounting bracket. Disconnect electrical connectors from PCM. Remove PCM and mounting bracket.

3. Remove heater core cover. Remove heater hoses from heater core. Remove heater core by removing two screws. Installation is reverse of removal. After installation, adjust Air Mix Valve.

KHLow2008
Dec 28, 2010.