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a/c does not work when towing

764 views 2 replies 2 participants last post by  jc82chevyman 
#1 ·
my neighbor has a 02 crew cab shortbed lariat with 90000 miles on it, his a/c works great until he hooks up to his 37 ft boat. then it just blows hot air, what could cause this???
 
#2 ·
any help would be great!
 
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