Fine Print INCLUDES: Replace Cabin Filter, Inspect hoses & connectors, or leaks; Recharge system with up to 1 lb. of R-134a refrigerant; Check and adjust drive belt; Clean condenser fins & evaporator drain; Check output temperature. Certain models may be higher. R-12 systems excluded. Must present coupon when order is written. GM vehicles only. Not valid with any other offer. Valid only at Copeland Chevrolet Coupon void if altered.