20 Most Recent Metra 40-cr20 2005-2008 Chevy Cobalt Ss Car Antenna Cable Audio Radio Stereo Questions & Answers

I don't have an 08 instead I have an 06 and my manuals are for the 06. Though I would imagine that not much has changed for the HVAC system in 2 years.
So I looked up your problem in my 06 manuals..

Here is what it says.
  1. Turn on engine, select defrost, select maximum blower: Does sufficient air flow from the defroster outlets? You indicated NO: Go to 11: "Go to Air delivery improper"
  2. Now under Air Delivery Improper: Turn engine ON with Blower OFF: Is the blower off? You indicated YES
  3. Place blower motor control in each speed postion: Does blower motor operatate: You indicated YES
  4. Does the blower motor operate correctly for each speed position? You indicated YES (You didnt mention that it did not since its not what you were asking about)
  5. Is the HVAC control assembly inoperative in all positions? You indicated NO You mentioned that it worked in a few of them
  6. Test the ignition 1 voltage circuit of the HVAC controller for an open, for a high resistance or for a short to ground.
  7. Inspect for bad connections at the harness connector o the mode actuator.
  8. Inspect the mode door and any attaching linkage for any binding
  9. Inspect the ductwork for any debris that would prevent airflow through the duct work.
  10. Inspect for bad connections at the harness connector of the HVAC control assembly.
  11. Replace the mode actuator.
  12. Replace the HVAC control assembly

Metra 40-cr20... | Answered on Jan 15, 2015

Does it not physically move to highest position or does it just not work on number 4? If it does not physically move, then switch is likely bad. If it don't work on number 4 then switch or resistor could be bad. You can test power with a voltmeter from the switch and to the blower motor to determine which one is the faulty one.

Metra 40-cr20... | Answered on Jun 10, 2012

It’s a ground, if your amp still won’t turn on after u finished installing Then use brown one as a ground and ground it to the same one as your amplifier.

Metra Car Audio... | Answered on Jan 21, 2019

You need to make sure the amp turn on lead is connected... its blue with a white stripe

Metra Car Audio... | Answered on Dec 31, 2017

Need more information. Are you talking about close to the camera or at the end that connects to the radio/display?

Metra Car Audio... | Answered on Nov 06, 2016

I tried to recategorize this question to get it into a more probable area to get a response but found that there just isn't anything suited for this question. I would try some forums that have more specialized and probable answers to this. There's a ton of information if you locate the places that discuss these topics. Or even try ebay, there's a good chance you could find exactly what you need there or even have the question answered by a seller for free. It never hurts to ask nicely.

Metra Car Audio... | Answered on Nov 16, 2014

Not finding what you are looking for?
Metra 40-cr20 2005-2008 Chevy Cobalt Ss Car Antenna Cable Audio Radio Stereo Logo

2 questions posted

Ask a Question

Usually answered in minutes!

Top Metra Car Audio & Video Experts


Level 3 Expert

85223 Answers


Level 2 Expert

218 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Are you a Metra Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

Metra Car Audio & Video

  • Metra Car Audio & Video

Most Popular Question

heater ac rear front defroster not

  • Car Audio & Video