aircondition problem

1999 CHEVROLET SUBURBAN
1,700,000 MILES • V8 • FWD • AUTOMATIC
Avatar
AGERAMI
  • MEMBER
  • 2 POSTS
99 chevy suburban only my front ac vents blow cold, the ones in the back are only blowing hot air. What could be the reason why?
Jul 18, 2011 at 3:58 PM
Advertisement
Avatar
DOCFIXIT
  • CAR REPAIR CONTRIBUTOR
  • 18,828 POSTS
Suspect faulty expansion valve for rear unit
Jul 18, 2011 at 4:50 PM
Avatar
AGERAMI
  • MEMBER
  • 2 POSTS
Thanks I will check that out.
Jul 18, 2011 at 5:31 PM
Avatar
DOCFIXIT
  • CAR REPAIR CONTRIBUTOR
  • 18,828 POSTS
See diagram if cold to expansion valve but warm on EVAP inlet the stuck shut
Image (Click to enlarge)
Attached Media
Jul 18, 2011 at 5:43 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.