The hoses attach to plastic quick connectors at the firewall. They can crack and leak. You'll need the tool to disengage the connector from the core inlet/outlet.
DmaxMaverick Today, 07:36
Sarah and I took the Blazer out for its first 2024 outing yesterday. We traveled up into the mountains not far from here. We eventually
I believe it’s one of two lines going into the heater core.
And it has a leak..and is it serviceable?
Update - Rear Disc Brakes
Rear Disc Brake Conversion
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for GM's 9-1/2" 14-bolt Semi-Float Rear Axle
Part I
The new GM 9-½" semi-float More Power Today, 12:44