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HOT AIR BALLOON OWNER
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14,932 Posts
So an Envoy is a car and you plan to find help for this on a full size truck forum, in the improper section to boot? :think:
 

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orale vato! arriba!
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645 Posts
A w126 fixes everything :read: :imo
 

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Timbrage: Engage
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5,671 Posts
New hvac unit needed.
seriously, check the voltages coming out of the HVAC unit, there should be a 17 wire pigtail connector, cut the purple wire with the yellow stripe, voltage should read 375 amps, if its anything less, you need a new HVAC unit

for your application, its part number 18436572-A1L
 
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