Question about 1996 GMC Sonoma

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I think the heater core is leaking and wondered if someone had a picture of where its located and how to get it out?96 gmc pick up 1500 serria.

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  • welch_ric577 Mar 09, 2009

    thanks alot for the help and god bless

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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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Purchase a 5/8 to 3/4 hose union and connect the two heater hoses to it. Just remove the two hoses from the heater core to do this. You will not have heat this way although the leak will be fixed
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Hello gobabygo1, my name is JShreader. Thank you for choosing fixya.com.

There is 4 Oxygen Sensors on this model Truck. I uploaded a picture showing you exactly where each of the 4 Oxygen Sensors are located. It is in .pdf format. You can download it by clicking HERE. I hope this helps you. If you have any more questions or need any more diagrams, please don't hesitate to ask...Thanks again, JShreader!

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switching the hoses is not recommended for trying to clear out a heater core because the coolant is meant to flow in one direction. you can try disconnecting the hoses from the heater core and flushing the core itself with a garden hose with low pressure in one direction for a few minutes and then switch and backflush the heater core. this is ok as long as the heater core is isolated from the engine cooling system. BUT if it is rusted pretty badly there is a chance it can develop a leak or blow out during the process so try it cautiously!! if the core is in-fact blocked you will have very little flow through the core and you will see what looks like rust coming out of the core, it may take quite a few times switching back and forth to clear it out. if it still remains blocked or if it starts leaking inside the car it will need to be replaced.

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