Heater Cable Length?

[Tahoe]

As posted by Certified Lotus who was looking for a heater cable I might have what he needs, but can anyone tell us what the correct length of that cable should be? I have one at 26 inches long from the end of the knob to the tip of the cable that attaches to he heater valve. I can't actually test fit it right now to my car to see if it will work so as hoping someone might have one available to measure.