Heater core

Tiny
SPEAR828
  • MEMBER
  • 1991 CADILLAC SEVILLE
  • V8
  • FWD
  • AUTOMATIC
How do I replace a heater core in a 1991 Cadillac Seville
Friday, December 24th, 2010 AT 3:03 AM

1 Reply

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
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.
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Tuesday, December 28th, 2010 AT 6:14 PM

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