Hello!i am a car mechanic from athens,greece and i work at chevrolet,cadillac and hummer.i only do service and stuff and not difficult problems.i need help please about the a/c of the trail.some cars when you turn on the a/c blow cold air ONLY at the passenger side.the driver side blows WARM.i read the bulletins but i cannot understand what exactly should i do.i am not an electrician but i beleive that is something easy.IF ANYONE HAD THE SAME PROBLEM PLEASE ANSWER TO ME,I WILL BE VERY GREATFULL!THANK YOU

 

Sounds like the Dual Zone Climate system is taking a crap on you. Its probably related to the control system in the dash.

 

Driver's side actuator located on left side just above gas pedal. To start with disconnect battery to reset to last position and try that first. Check freon charge make sure it has proper level useally 35-40 psi on low side, this sometimes will cause driver's side not to cool. Last replace drivers side actuator held in with two 4mm screws and a small wire harness.

 

I hope you are aware that this is a 12 year old thread and that neither of the posters has been around for over 10 years.