2000 GMC Sonoma little heat

2000 GMC SONOMA
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WGK450
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  • 1 POST
Heater problem
2000 GMC Sonoma 4 cyl Two Wheel Drive Automatic

I relace the the theromstac and still heat is warm then cool and warm again is there a heater control valve ?
Sep 18, 2010 at 7:54 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check the air blend door could be the actuator/motor or the vacuum solenoid valve
Sep 18, 2010 at 10:03 PM
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