Silhouette is blowing cold in front but hot in back seats why
SOURCE: Rear a/c not blowing cold, front works fine.
probably the same problem as the '99. you probably lost too much coolant. charge with dye and check for leaks, (these things lose refrigerant normally, so you may not have a bonafide leak but check anyway) change the accumulator as a matter of course. evac the system and make sure you lose no vac over the course of 5 to 10 min. recharge the system for the proper weight (which is on the accum sticker) if you need detailed instructions let me know.
SOURCE: front a/c problems
There is probably a temperature blend door in the duct-work under the dash that is inoperable or stuck in the heat mode.
SOURCE: Air randomly blows hot on left, right or back of 2004 Suburban
check the AC relay...not the fuse but the relay
SOURCE: Rear heater blows only cold air no matter what the
If this is equipped with a rear heater core it is probably plugged up and needs to be disassembled and cleaned out
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