What would cause temperature Knob not to adjust the temperature setting on the display?

Asked by Mar 03, 2014 at 07:12 PM about the 2004 GMC Sierra 1500 4 Dr SLE Extended Cab SB

Question type: Maintenance & Repair

When the vehicle is first started in the morning and it is cold the temperature knob will not
increase to high setting for heat. The air conditioner is off and the heat setting selected. If
you rotate the dial super slowly it may increase a few degrees then go back to 60. There
are not any issues going from hot to cold.

1 Answer

75,775

Sounds like the climate control panel on the dash is bad. Rockauto.com carries rebuilt units. HTH. -Jim

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