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What is the routing diagram for all hoses and valves for a 1999 Chevy Suburban with rear ac

Bought the truck with the hoses cut and rerouted. Replaced both heater cores now I need to know what hoses and connections I need.

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Google up "1999 Suburban heater hose diagram...

Posted on Jan 01, 2015

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I just bought a 99 chevy suburban and they have like 6 differant hoses disconneted. why


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Rear ac on 94 surburban blows warm, front is cold. Is there only one orifice on the dual air system.


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Back air blows cold air, the front blows warmer air


I recenly had the same problem on my 1999 suburban, even after I replaced the whole ac system.
The heater valve, which is under the air filter area was not closing, causing heat to be blowing over the evaporator core. I used a zip tie to keep it in the closed position, and ac went from 70 degrees to 40. I think the vacuum switch is bad, 40 dollars (dealer part). You can also pull the vacuum hose off the switch, which is on the firewall and connect it dirctly to valve and it closes the valve, but fits loosley. Use silicone around vac hose if you go this route.

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