Stereo & Electronics - Gentex problem

I have a Gentex rearview with the temp/compass installed in my SS and a couple of days ago it started showing "OC" then it'll show a outside temp of (for example) -32 or 46 degrees or some off the wall reading. Anyone know what "OC" means? I'm thinking maybe the temp. probe died but I'm not sure.

Let's try this one in the Electronics section.

Okie doke, thanks. :cheers: So.. Anyone have one of these factory installed in another GM vehicle with maybe some info in the manual?

Anybody have any tips as to what might be the problem?

Okie doke, thanks. :cheers: So.. Anyone have one of these factory installed in another GM vehicle with maybe some info in the manual?

I'll check the manual for you...... I have one in my Silverado!!!!

Sorry..... no answer in the owner manual.

Suggest you refer question to the Preforamce Trucks section.... hopefully someone in there will know. (Just a guess.... but I would think it have would be something to due with calibration of the compass.) (There is a section in the manual on that... if you want I can post but it doesn't referance that error.)

Found this on another site(Thanks Google!!!!).... looks like it is a temperature senor issue..... your car probably doesn't have one!!! :(
(Please post back if you find a solution... I was thinking about this mod for my car.)


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I just put in a gentex comp/temp mirror in my 2001 z71 and the temp display is showing OC. Can anyone help?


adalez71
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12-16-2003, 09:18 AM #2
adalez71
Posts: 14 Found the problem. Factory harness was there but the sensor wasn't.

Try calling Gentex (616-772-1800) or their North American distributor Mito Corp. (800-433-6486) and see if they can tell you what it means and how to fix it.

I bought the mirror with temp sensor off ebay and installed it sometime ago (pretty easy upgrade BTW) and it has worked pretty good up until a week ago when the temp reading started showing "OC". It's got to mean something.

Maybe the temp sensor has went out!!???!????? Or has a loose connection????

I ordered another temp sensor and put it in. It seems to have fixed the problem, thanks all.

yea oc stands for open circut