Check Out Our Special Offers in Fossil Creek (Alliance) Click on coupon to print or present coupon on your mobile device. 50% OFF A/C CHECK A/C PERFORMANCE CHECK DIAGNOSTIC AT 50% OFF. DOES NOT INCLUDE THE COST OF ADDING FREON TO THE SYSTEM. Not valid with any other offer. Present coupon at vehicle check-in. Offer only valid at the Fossil Creek and Roanoke Christian Brothers locations. Offer only valid at the Fossil Creek (Alliance) location. 6501 Old Denton Rd., Fort Worth, TX 76131