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The rear ac unit of your 2003 Tahoe does not blow cold the front works fine the line to the rear does not get cold like the line to the front?
Wiki User
∙ 14y ago
I believe the rear Expansion Valve may need replaced. If it has failed the rear evaporator will not cool as the freon will not flow. These Tahoes have an orfice up front and an expansion valve in the rear (inside the rear HVAC unit under the passenger quarter trim). The coolant lines and the A/C lines have to be undone to remove the HVAC system from the vehicle to replace the Expansion Valve. It's about 650 at the dealer (or you can get the valve for under 100 from an auto parts store if you think you can do the job yourself).
Wiki User
∙ 14y ago
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