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Recommend you buy a Chilton or Haynes manual for this one. Explaining it without visual references makes it a bit more difficult. Before you go through the process of changing out the heater core, try backflushing it to see if it might simply be clogged.

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โˆ™ 2013-06-16 16:18:41
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Q: How do you replace a heater core in a 1991 Chevy Blazer S10 with AC?
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