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