pdmorris1

I have a 2011 LT this was originally a rental car. It has the rear view mirror with on star and manual dim. Is it possible to upgrade my mirror to one with on star, auto Dim and compass without having to do any wiring. I found an GNTX 511 on eBay that says it fits my year HHR . I know on rental cars there are sometimes options omitted. Thinking maybe mine might have the harness to fit the better mirror

Lucky

I was able to upgrade my mirror in my 07. It did not have on star or auto dimming.

Mine required me to run a power wire and change the connector.

I would be willing to bet sense you already have on star you could up grade with out any modifications.

How many pin connector is on your mirror now?

Oldblue

I just tried to install a mirror with the auto dim and compass and Onstar my conector is wrong with only three wires
Lucky can you take a couple of pictures of your conversion please, I also have a '07 LS

donbrew

I bet only LT has the compass & dim. Wasn't something OnStar dependent?

Lucky

I bought the mirror on ebay it is a used 07 auto dimming mirror with compass w/o on star. I got the connector at my local bone yard out of a Cadillac with on star.

I only had to add the key on 12 volt feed the ground and door switch is already there the others are not used.

Lucky

Here is a how to from the cobalt forums. Interior How To Install An Auto Dim Rear–view Mirror - Cobalt SS Network

I didn't find this until after I installed mine. I just found the connector and played with it until it all worked.

I wish I would have made a diagram that I could share. Sorry.

Oldblue

Off to the wids of the wrecking yard!! For a connector and some wire!!!

Lucky did you just splice the new connector to your existing three wires??

Lethal Tendencies

I upgraded my mirror to one that has Bluetooth phone with caller I.D and a 4.3" screen. You can also hookup a reverse camera.

pdmorris1

Was the rear view mirror with auto dim and compass standard equipment on the 2011 HHR LT -1 or was it part of an option package?

Lucky

I just splice in the new connector to my old wiring so I did not have to mess with the pins in the connector.

The cars wiring to the old mirror just used 3 wires. 12 battery,ground and the door pin switch for the map/ dome lights.

The mirror I got from ebay turned out to have led map lights in it. That was a added pleasant surprise.