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ElectroChromic Mirror change in Trailblazer

PaulPro

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PaulPro Enthusiast

PaulPro

Posted
Posted

I purchased an auto-dimming mirror from a 2004 Silverado to put into my 2005 Trailblazer. I wanted the auto-dimming function as on my 2002 Envoy.

 

Checking the wiring diagrams, both pin-out the same. I put the mirror on and it works well except for the temperature read-out.

 

My Trailblazer is an LT, it has the auto dual HVAC controls that display the exterior temp there. This temp readout still works ok but the one in the mirror displays "OC"

 

I thought maybe it was stuck on 0 degrees C but that isn't it, it just doesn't display the temp. maybe the problem is the double display is throwing the circuit a curve. But the lower control display works fine.

 

Has anyone else tried this mod? any ideas on how to fix it.

 

(My older mirror did not display the temp, only the compass)

 

Thanks

 

Paul P

MuranoSE Enthusiast

MuranoSE

Posted
Posted
I purchased an auto-dimming mirror from a 2004 Silverado to put into my 2005 Trailblazer. I wanted the auto-dimming function as on my 2002 Envoy.

 

Checking the wiring diagrams, both pin-out the same. I put the mirror on and it works well except for the temperature read-out.

 

My Trailblazer is an LT, it has the auto dual HVAC controls that display the exterior temp there. This temp readout still works ok but the one in the mirror displays "OC"

 

I thought maybe it was stuck on 0 degrees C but that isn't it, it just doesn't display the temp. maybe the problem is the double display is throwing the circuit a curve. But the lower control display works fine.

 

Has anyone else tried this mod? any ideas on how to fix it.

 

(My older mirror did not display the temp, only the compass)

 

Thanks

 

Paul P

 

 

 

 

 

Are you sure the mirror displays the temperature and not compass readings only? Just curious because I have an 04 Bravada and the mirror one is for compass readings while the HVAC has the outside temp readings.

USA1Fan Enthusiast

USA1Fan

Posted
Posted

No idea about what's happening. I had an '03 LT without the uplevel LT package (aka, no leather, no bose, no dual auto climate control, no rear stereo, no steering wheel controls, no turn signal mirrors, etc.). The mirror DID display the direction as well as the temperature and also was the auto-dimming model. Did GM decontent some more on the newer models? (removing the auto dimming feature from LTs really sucks)

PaulPro Enthusiast

PaulPro

Posted
  • Author
Posted
Did GM decontent some more on the newer models? (removing the auto dimming feature from LTs really sucks)

 

 

 

Not only the Trailblazer but even the high end (?) Envoy's and Ranier's have a mechanical mirror rather than the auto-dimming feature.

 

Paul

BBSilverado Enthusiast

BBSilverado

Posted
Posted
I purchased an auto-dimming mirror from a 2004 Silverado to put into my 2005 Trailblazer. I wanted the auto-dimming function as on my 2002 Envoy.

 

Checking the wiring diagrams, both pin-out the same. I put the mirror on and it works well except for the temperature read-out.

 

My Trailblazer is an LT, it has the auto dual HVAC controls that display the exterior temp there. This temp readout still works ok but the one in the mirror displays "OC"

 

I thought maybe it was stuck on 0 degrees C but that isn't it, it just doesn't display the temp. maybe the problem is the double display is throwing the circuit a curve. But the lower control display works fine.

 

Has anyone else tried this mod? any ideas on how to fix it.

 

(My older mirror did not display the temp, only the compass)

 

Thanks

 

Paul P

 

 

 

 

The temp signal is not wired into the harness going to the mirror since it is routed to the HVAC controls. If you can get a wiring schematic for the Trailblazer you can splice into that temp wire and run it up to the mirror connector. It will not change anything to have the same temp signal feeding to different displays.

USA1Fan Enthusiast

USA1Fan

Posted
Posted
Not only the Trailblazer but even the high end (?) Envoy's and Ranier's have a mechanical mirror rather than the auto-dimming feature.

 

Paul

 

 

 

Man. I'm really sorry I traded my '03 instead of the wife's Malibu, now. We were just right-side up on the TB and not even close on the car. So we were gonna keep the car til we got it past the break even point and trade it on a newer TB, but seeing all the changes to the new ones I think we'll just stick with her car (barring severe problems).

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