The converted Guernsey stores comprise two Stampers stores, two Le Riche’s stores and five unbranded forecourts.
Changes include external Checkers branding, new staff badges and internal signage.
Andrew Bagot, managing director of Le Riche’s Stores, said: “Customers have already had the chance to experience Checkers Xpress at Le Pollet, Guernsey, and after the store’s success we are committed to transforming more stores.”
John Garton, head of marketing, said the nine rebranded stores in Guernsey were awaiting refits which could take a few years to complete.
The refits would enable them to offer chilled and fresh food and food to go.
Checkers stores feature a collect and save scheme, with shoppers earning points from food and petrol purchases which can be exchanged for vouchers to spend in store or on airmiles.
In its interim trading statement, CI Traders, owners of Le Riche’s stores, said the format had seen 5.2% value sales growth in the 22 weeks to January 3.
The company also operates the Marks and Spencer Jersey franchise and said that value sales there had grown by 10% in the same period.
CI Traders has reported turnover in the group’s continuing businesses 6.2% ahead in the period on a like-for-like basis.