1991 Chevrolet Cheyenne You Heater

1991 CHEVROLET CHEYENNE
177,835 MILES
Avatar
RICHIEAMBER
  • MEMBER
  • 1 POST
i have changed the radiator and heater core and thermostat. and still blows cold and the radiator hose stays hard even after i changed the thermostat.
Feb 12, 2012 at 1:02 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
The hoses staying hard is normal. With the engine running, warmed up, and the heater on high, feel both heater core hoses. Both should be hot. If they are, check and repair the blend air door located near the heater core. If only one is hot, check for air blocks. Try to bleed coolant through the heater core. I usually loosen the return line.
Feb 12, 2012 at 1:09 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
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.