Question about 2004 Chevrolet TrailBlazer

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When idling(ie at red light), the ac was on high

When idling(ie at red light), with ac on #4 setting, the engine shuts down. It restarted and ran fine with ac still on mentioned setting. Later that same day while adding freon, ac was running on high (#6 setting) and after about ten minutes, the engine shuts down. It restarted fine, but later while driving with ac on #4 setting, a sound simular to air being blown off could be heard in short sudden burst on several occassions, the vehicle **** as if the the engine had lost power temporarily, but would keep running. It ran fine after. Vehicle is 2004 with 57000 miles. Should these incidents be of serious concern?

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Sounds as if the A/C Compressor has issues with the clutch/shaft locking up.... the blow off you heard was probably the pressure relief valve allowing an over charge of freon escape the system....however if the A/C system has a compressor problem or a clog that condition will also happen....can you have someone put a set of high/low gauges on it just for safety sake to be sure it is not developing too high of a head pressure...that would be my recoomendation....if the compressor locks up the belt can be thrown off causing your vehicle to require a tow/repair on the spot.

Posted on May 06, 2010

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