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How do you pull out and replace the temp control unit on a 1990 gmc sierra 1500 truck this control unit is one piece with both buttons for heating ac and amfm radio?
Wiki User
∙ 12y ago
First take off the faceplate surounding the dash by removing the four torque-head screws in the corners. Then remove the four screws (2 on each side) that hold the heating control unit in place (It is a separate piece from the radio head unit). Pull it out far enough so that you can reach the wiring harness that plugs in the back and unplug it. You're done!
Wiki User
∙ 12y ago
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