Apply for your GCL Core Return using this form
Please try to provide as much information as possible to ensure a smooth and quick turnaround. DO NOT send any parts for core return without getting a Return Core Authorization (RCA) number from GCL Diesel. Cores MUST be returned in the original box to be eligible for credit.
Please Note: Effective September 1st 2021, please ship all core returns to our new GCL Core Warehouse located at:
GCL Diesel Core Returns 15845B 112 Ave NW Edmonton, AB T5M 2V9
NOTE: Cores must be “like for like” which means part number for part number and returned in the same box that your new unit arrived in. Cores must be complete, without previous disassembly. Cores must not be damaged by non-operational causes, such as torch or tool marks, water damage or fire damage.