At one point air conditioning would just stop and randomly come back on, usually after hitting a bump or something. Air conditioning in the front works just fine and the compressor was replaced last month.
The problem is probably the blower motor relay/breaker. It is located under the hood, in a plastic cover with the rest of the relays. It is labeled either next to the relay or on the inside of the cover.
murf427
SOURCE: 2003 chevy tahoe no rear heat
I know the earlier tahoe's have two heater lines running from the engine compartment to the rear under the vechile. Those lines could be clogged or pinched shut. What you do is get two hose locking pliers. Go under your truck, they are two metal lines that turn into rubber and back into metal again farther down the line. First, checked for pinched lines. If none, find where the rubber hoses are, clamp them off, remove from metal lines and drain. Use garden hose to flush fresh water through. When water comes through at high pressure and pretty clear, it should be done. Reconnect hoses, top off radiator fluid and it should be fine.
SOURCE: 1996 Chevy Tahoe air conditioning not blowing cold air
That "thing" is part of the compressor clutch. When it’s spinning the clutch is engaged, when it stops the compressor is off. If it’s constantly cycling, you probably don’t have enough freon in the system. But remember, however the gas escaped before, it will escape again, unless you fix the leak.
SOURCE: 2005 tahoe no air blowing
as long as all the fuses are good.. its probably the blower resistor/module... located next to the blower motor under the pass. side of the dash..
SOURCE: 99 tahoe, rear air is cold, front air is warm, has
either a switch is bad or a electrical operated door failed within the duct work. . This vehicle has the abililty to set a code for this condition and only the dealer and some shops have the diagnostic equipment to diagnose this cortectly the first time.
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