Having a parasitic draw, after a week, 10 days approx battery will be flat. Suspect Onstar is issue searching for a no longer signal.... I believe this fuse "INFO" is dedicated to Onstar. I removed the fuse (broke a leg off the fuse, so it would still cover fuse box slots & reinserted). Did not meter for a parasitic draw- just went path of least resistance as I am pretty sure this is the culprit. Did not feel ambitious enough to remove center console and disconnect Onstar.... Figured make a post & ask if anyone else been down this path recently.....? Pretty easy find for the fuse- pic attached. Its located in the "under hood" fuse box. 15a mini.

 

i had my 2003 onstar drive me nuts. it had gotten a bit wet from the clearence light gaskets leaking onto it on a hill. it kept dialing onstar and connecting to representatives. i thought it did not work but i guess it does. had to pull the fuse to shut it up. but the onstar was draining my battery at about the 10 day mark as well if i let the H2 unused for that long. the battery would be in the 11v range in 2 weeks.

 

So as far as you know also- that fuse is just dedicated to onstar? Was wondering if anything else utilized that circuit....

 

i would have to look to see exactly which fuse i pulled to be sure. but it was in the under hood fuse panel. i have not noticed anthing else affected other than the onstar.

 

To others as follow up, left the H2 for about a week unused - started right up with zero indications of a weak/discharged battery. If others are chasing a parasitic discharge... may be a good place to start, optimistic this was my issue.

 

I'm 99% sure that's the fuse I pulled on my 2003 for similar reasons. Ended up replacing the OnStar with a cubby that fits perfect..... Found it somewhere online in Germany. I think it's the OEM cubby that goes in when the vehicle is shipped to markets that couldn't use OnStar.

 

Here's someone making them I think:

https://www.etsy.com/listing/9213136...lacement?gQT=2