A pumpkin recipe calls for cashew butter. I am not eating cashews. Would pecan butter sub well? Are their textures/consistency similar enough?

Hi Heather - I agree with Nancy, peanut or almond butter would be a closer substitution match for cashew butter.

When working out a food substitution, I often go to a nutition data base drawing on USDA and similar sources.
Along with nutritional values by portion or shopping size, it also gives profiles of each food in fat, carb and protein.
Using this, I find that pecans are much fattier than cashew, about 90% compared to about 70%.
So either reduce the volume of pecan butter vs cashew butter in your pie, or use a nut closer to cashew profile (peanuts and almonds both around 80%).
see attached FYI for the nut profiles.
https://nutritiondata.self.com/facts/nut-and-seed-products/3095/2
https://nutritiondata.self.com/facts/nut-and-seed-products/3129/2
https://nutritiondata.self.com/facts/legumes-and-legume-products/4355/2
https://nutritiondata.self.com/facts/nut-and-seed-products/3085/2