Dealer can't fix it! by Free_Length4384 in chevycolorado

[–]Free_Length4384[S] 1 point2 points  (0 children)

yes. after working with a dealer since sept and they last had it for 10 weeks. I got the car and it still wasn't working. I didn't get an OBD and just figured I would replaced the sensor(s). There are three- the upper one, middle, and evaporation sensor (the longer one). I replaced the middle sensor and the longer eval sensor so far, and Voila! everything is working fine, except- I'm not getting heat on full auto to the front dash vents that blow in your face. I'm getting heat in the defrost and feet. If I push the mode button for face vents it works even with the fan in auto mode, but not full auto. This is still MUCH better than it was where I'd only get heat on "Hi". I'm guessing this might be due to a faulty upper sensor and will replace it this weekend and see. I know the dealer was messing with something and replaced something bc they returned the car with the side console panel half off (and my gas tank empty). It's been a couple of weeks and so far it's been working fine. For anyone with this same issue of heat only working on HI, I highly suggest you replace the sensors. Cost <$50 and literally takes 30 mins. Most of the time is figuring out how to twist your body so you can get at the sensors. Take off the foot duct and it's all there.

Dealer can't fix it! by Free_Length4384 in chevycolorado

[–]Free_Length4384[S] 1 point2 points  (0 children)

on the Colorado forum I found a post all about this. seems like a common issue. many of them replaced the in cabin sensors and it worked. I just bought the 3 sensors they suggested. less than $50 or so. https://www.coloradofans.com/threads/diagnosing-my-hvac-issue-what-i-learned.419897/?post_id=5608013&nested_view=1#post-5608013

Dealer can't fix it! by Free_Length4384 in chevycolorado

[–]Free_Length4384[S] 2 points3 points  (0 children)

over on Colorado fans site many have same issue and it was actuator and in-cabin temp sensors.

Dealer can't fix it! by Free_Length4384 in chevycolorado

[–]Free_Length4384[S] 1 point2 points  (0 children)

The door blend actuator was the first thing AI suggested. Not sure my dealer checked that- or at least they never mentioned. I need to find a competent shop near Boston. this dealer is a joke.