A/c blows warm air

Hi, If you could bring in your GMC pick-up we can do a no charge inspection of the a/c system and let you know what it would it might need. please call Dave at Holmberg Automotive for an appt. 858-279-1010. Thank You

Sounds like you have a restriction in your air conditioning system that will require work that is beyond the "do-it-yourself" capabilities. I am face to face with AC problems like this every day, especially right now as hot as it has been in California, and I can tell you even my highly equipped shop with highly trained and skilled technicians fight AC concerns regularly. Contamination happens, extenuating circumstances happen, and it takes resources to overcome this.