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I got a 99 k2500 suburban with the 7.4l

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5 years 6 months ago #43328 by Johnyboy
I got a 99 k2500 suburban with the 7.4l was created by Johnyboy
Does anyone have any diagram or know how to connect rear(auxiliary) heat up to the heater core valve. The valve has four connections. Two on either side. I would like to figure out how to connect the (Y) hose fitting to allow coolant to go into rear. Please help winter weather is fast approaching cant have the kiddos freezing back there.

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