Check your heater hose connections. W/ part numbers

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Roilux

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It's preventative maintenance time on my '04 Tahoe in anticipation of several road trips this spring and summer. I purchased all four heater hose connectors as the existing ones looked original. At 20years old and 170k they've held up well, or so I thought. Upon removing the first clamp the inlet snapped clean off as it had become brittle. (first photo)

Five of the six quick disconnects came off (one fell off) without a tussle. The black tee connection on left side connecting at the firewall wanted to fight. Squeezing - nope. Using a disconnect tool - nope. Then I recalled what a Chevy parts guy told me when their guys have a stubborn plastic connector to remove. They use a red hot knife to melt the tee on both sides and remove it without stressing the inlet pipe to the heater core. I tried and and can confirm it works with ease. (last photo)

Here are the GM part numbers for a 2004 Tahoe and similar vehicles with rear A/C and heat.
GM# 15055342 Auxiliary heater inlet hose Tee connector - black
GM# 15055343 Auxiliary heater inlet hose Tee connector
GM# 15119175 Heater hose inlet connector
GM# 15059584 Heater hose connector

Add a 1" minimum diameter hose clamp to your shopping list. The plastic factory clamp can't be reused. (It's missing in photo 2)

Happy Trails!
 

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