Question about Chevrolet Silverado 2500
You have a bad transition valve or disconnected vacuum line on said transition valve that moves the blend door open and or closed under the dash. If you have the heat on and heat only goes to driver side and still cold on passenger side, then the problem is at the passenger transition valve.
Posted on Jan 12, 2019
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Posted on Jan 02, 2017
Did you check your coolant level or was it low and you added to it at some point? If so the system my need to be bleed or worst case the thermostat is going bad.
Posted on Jan 03, 2009
You have dual zones that are controlled by temperature actuators the passenger side has lost its memory or has gone bad you can put it in self programming by disconnecting the battery for ten minutes then hook it back up start the truck turn the temperature control on but do not touch any other controls let it go thru the self programming for about 6 to 7 minutes then select your temperature you want if it still does not work properly you may have a bad actuator or a bad connection at the actuator
Posted on Jun 03, 2009
The actuator has gone bad. They can be programed, and reset, but usaly they are bad, and that will only patch the problem for a while.
Posted on Jun 19, 2009
Its more then likely the temp door broken or temp door motor broken/stuck. There is 2-3 of these motors under the dash on the side of the evap/heater core box. Some require extensive labor to replace, good luck
Posted on Jul 29, 2009
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