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Old 01-23-2007, 02:51 PM
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KingRanchMan02
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There is no known way to replace the heater core in a `97 - `03 F-150/Expedition without pulling the dash out far enough to access the heater plenum. The instruction for this procedure (not mine) are available here. http://my.voyager.net/~sscully/F-150...50_Exp_002.doc

Best of luck!