Thanks for the info. I replaced all three actuators (driver, passenger, mode) with actual GM. I calibrated them properly and the mix seems to work as well as new. It was just when using heat, the lower ducts seemed much hotter on the passenger than the driver. It must be the foam you spoke...
Is it normal for the driver's side to have cooler "heat mode" air when bottom vents are used, compared to the passenger side when both sides are set to the same temperature?
Is there more than one blend door than the one on the passenger side left of the glove box?
The actuator for the above...
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