Am going to rent a car to go pick up my mother in Colorado, have plugged in a couple of discount codes into Avis' reservation system, with no significant discount (except the economy & mid size rates seem to double)

Any suggestions? I need a Mid/Full size for 2 days...

Needs to be Avis since they're the closest.

10% off
Use Coupon Code: K765100
Details and Restrictions: Enter the coupon code where prompted on the merchant web site (usually in the shopping cart or during checkout). The promotion code is being applied to your order. Discount will be reflected in the quoted price. Discount amount varies by car type/size and location.

I'll let ya know if I find anymore.

10% off
Use Coupon Code: K765100
Details and Restrictions: Enter the coupon code where prompted on the merchant web site (usually in the shopping cart or during checkout). The promotion code is being applied to your order. Discount will be reflected in the quoted price. Discount amount varies by car type/size and location.

I'll let ya know if I find anymore.

Thanks :D

have you tried booking with triple A discount?