hey everyone new here. i have a 2009 SS sedan, around 80k original miles. my horn stopped working. after my mechanic checked everything out he has determined it must be the horn relay which is intergrated into the underhood fuse box. problem is we cant find a replacement anywhere plus they are discontinued.

anybody know what other fuse boxes would work? thank you all...when i get a chance i will post my mods and such.

thank you

 

Kind of in the same situation, and honestly it's a very slim chance you'll find one brand new - I've been searching for a couple months now. You can look up local junkyards and see if you can't nab a decent one, or I've also been looking on ebay. Either way, you're looking at about $100-$150 for the unit.

 

these are available new.
They are not cheap.

You can buy them from GM still.
AFAIK, the relay or power distribution block (what I believe it is properly referred to as) is the same for 2008-2010 Cobalts - as in ALL of them.

My opinion is to get a second opinion.
Maybe ask around if a local dealership has a very good reputation at diagnosing electrical issues.

My gut says that the horn shouldn't have a whole lot to do with power distribution block.

Just because guy wears overalls, and does a job daily, doesn't mean that he is impervious to mistakes or misdiagnosis;
A good shop will have at least one tech to double check electrical diagnosis'.

 

Can you share where? Even gmpartsdirect doesn't have it. My issue is different from OPs however I'm 99% confident mine is causing issues (I'm also just about at 250K kms)

 

I forgot about this...
I will look - because I m pretty sure I had a print off from a dealership;
I believe I took the vin of the car that I bought (as a wreck) in 2010, to the local trusted dealership to confirm that the power distribution block (PDB) was the same as the one in my car;
Curiously, the relays were assembled a bit different - I am guessing it was a matter of the precise relay being used in spots was changed during the 2009 model year production run.

Anyway, I am pretty sure I received a print of that PDB for pricing and availability, just incase I needed a new one...
I had the page on Crate Engine Depot open just before you posted - they appeared to have it available, but my browser updated, and I couldn't find that same page...

 

ok.
I am coming up dry.

I found the original part number for our fuse box was 25894225
The superseded part number is 20814892

I could not find it on Crate Engine Depot(!?).

I had thought I read in the past that the fuse box was interchangeable with others - and I suspect that the non-LNF 2008-2010 Cobalt's use the same one;
It's quite possible that the part number is for the fuse box as assembled with relays, and that might be the difference between 2008-2010 2.2L & 2008-2010 2.0L applications.

The superseded part number for the 2.2L fuse box is 20814891
The single digit part number difference does not indicate anything other than the numbers were allocated sequentially - but GM tends to do things in patterns, even if the part numbering can be seriously goofy at times;
So sequential allocated part numbers could mean that they have a relation of some sort.
And then there's the fact that the part number is for an assembly - that is a combination of other parts, sold as a single package.

I would suggest that you look on https://www.car-part.com and if a 2.0L car is there, snap it up.

If you are able to spend some time (in warmer weather) to see if the etched part number on the board (iirc is is visible) is the same for 2.2l & 2.0L, I'd take that as an indication of interchange, as long as you make sure everything is plugged in the same.

I will keep you in mind, and keep an eye out....

 

This is what was confusing to me: even if the fuses/relays are basically the same, if there's a different pin count to the connectors underneath, I'm going to be dealing with the same headaches. There's been several used fuse boxes on EBay from an 09, but a LS/LT.

 

Well, I did find one on a (stock!) 09 SS that has 369K kms on it (wow) for cheap. Everything else was the 2.2/2.4L. We'll see what happens.

 

great!

 

I did do a comparison just to confirm, and the only section that didn't have a relay, and didn't even have clips for a relay to sit in it is this one.
I just swapped the relays just to see if that was the issue, but it isn't. I would have to swap the whole deck out and hope it does resolve it.