You are able to update products Parts Unlimited with Stock Sync. Just choose on Parts Unlimited template after choosing to update existing products in your store. 

Note: Parts Unlimited only able to run 3 times per day. Because there is a limitation on the supplier API which only given 3 response each day per credential. 

1. Go to Setup New Feed > Choose Update existing products.

2. Choose or search for Parts Unlimited template.

3. You need to fill up the Username and Password from your Parts Unlimited profile. 

4. For the Dealer Code also need to be filled up which gets it from the supplier. 

5. Click Next to the field mapping section.

These are the available fields that can be updated with Stock Sync. 

SKUPunctuated Part Number
priceCurrent Suggested Retail
quantityNational Availability
CostBase Dealer Price
Compare at PriceOriginal Retail