Question about 1996 GMC Sonoma
Try “autozone.com” or your local library for diagrams and step by step instructions and here is a place for GM parts: Schram auto and truck parts 1-800-292-1032
Posted on Mar 08, 2009
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Check your radiator fluid level, if it is low it is a good chance your heater core or the hose to the heater core has a leak. The heater core is a small version of a radiator which has the air from the blower blow across it to force warm air into the cabin of the vehicle. You will need to probe under the passenger's dash to locate the leak.
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