It's most likely a motor. When it doesn't work hit under the glove box with meaningful but gentle hit and see if it pops on, if it does it's a motor. Alot of cars coming in the shop have complaints of an intermittent blower motor. In fact two days ago a Bonneville would have no blower motor but would kick on after heavy acceleration. In all cases r&r of the blower motor were confirmed as fixes. When a resistor goes out you usually run into the issue of not having all your fan speeds. N-bodys (GA's and Alero's for sure) have the biggest issue of loosing fan speed 1 & 2.
To troubleshoot the issue pop the BM out and probe for power and ground.
P.S it's good to be back on aleromod, I like the changes. And it's good to see another Minnesotan
