2002 GMC Denali ac quit blowing cold air in rear control unit 2 years ago and now this year the front quit blowing cold
2002 GMC Denali ac quit blowing cold air in rear
control unit 2 years ago and now this year the front
quit blowing cold this year. Comprssor kicks in and
stays on it does not cycle like its low on freon.
Tried adding a can and it does not take so
shouldn't be low on that. Where do I look next?