Having problems with your 1994 Chevrolet S-10 Blazer ?
If the heater door is stuck on a '96 S-10 Blazer does the dash have to be completely removed to access it. Service manager at Chevrolet told me it did and labor alone would be 8 hrs.
For a bad door yes for the actuator that operates it no
Repair Help & Product Troubleshooting for 1994 Chevrolet S-10 Blazer
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