1998 GMC Sierra heater contol valve

1998 GMC SIERRA
5.7L • V8 • 2WD • AUTOMATIC
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JOHNNY GORE
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Where is it? & how best to replace-thanks
Nov 2, 2014 at 11:21 AM
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HMAC300
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you have an actuator in the heater not a water valve. see pic for removal it is under the dash.
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Nov 5, 2014 at 10:59 AM