Q: ac blower blows only on high on 1999 Chevrolet 1500 Pickup

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
replaced fuse now only blows on high
(3) Answers
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I looked to see if there were any recalls or technical service bulletins related to the blower motor. perhaps the blower motor is drawing to much current on high speed due to a motor that is seizing up or has wear causing it to experience problems electrically. I looked depending on whether your truck has air conditioning or not takes between it takes .9 to 1.4 hours to remove the blower motor to test or replace it. You may find leaves and debris in the system or ducts that may result in the blower having to work harder.