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Old 04-04-2019, 10:34 AM   #1
S10Fan
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99 Silverado A/C condensation drain

99 Silverado 1500, recently repaired/serviced the A/C, 40 degree vent air for a couple weeks. No condensation is draining from the firewall drain tube, no water on the interior floor (rubber mat). I bent a 1/8" piece of round bar and ran it up into the drain tube, no apparent blockage. I have to think some water would come out of the drain after each use.

How far up into the tube should I be trying to clean out? Should I remove the tube and try cleaning again?

I'd rather get ahead of this before I have 100 degree days and a wet floor.

Thanks in advance!
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'99 Silverado 1500, 4.3, 5-speed, reg cab, short bed
'50 Chevy 3100, 307, TH350, S10 Chassis, air ride
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Old 04-11-2019, 05:53 AM   #2
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Re: 99 Silverado A/C condensation drain

Update.....

I guess there hadn't been enough humidity in the air for much condensation to develop. The drain appears to be working normally with recent higher temperatures.
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'99 Silverado 1500, 4.3, 5-speed, reg cab, short bed
'50 Chevy 3100, 307, TH350, S10 Chassis, air ride
'50 Chevy 2DR Hard Top, 307/350, M2 Front End, 3:36 Camaro rear end
'30 Model A Pickup, suicide front end, 350-tri-power. Some call it a "Rat Rod", I call it a Hot Rod!
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Old 04-11-2019, 06:15 AM   #3
Palf70Step
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Re: 99 Silverado A/C condensation drain

Glad it seems to be working OK now. Had no clue since I no longer have any late model trucks to look at..
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