Battery Drain On '03 1500hd.....

[sirjeffro]

I read in the "full-size" section about a TSB from late 2002, #02066 Battery Drain. See the post here- http://www.gm-trucks.com/forums/index.php?showtopic=14362

It refers to several GM models and gives VIN ranges. Mine is not in the range listed, but.......

I am wondering if this BCM re-calibration is available other than from a dealer? Has anyone had this re-calibration done? My truck (2003 1500HD) is not within the VIN range listed in the bulletin but seems to have parasitic draw that will nearly kill an Optima red-top overnight. I know, I know...the curse-ed Optima. So I charged up the OEM Delco and put it in and exchanged the red-top for another one.

The OEM battery has been doing a fine job since Saturday Jan. 17, 2009. Now I detect that each day it is a little more sluggish but has yet to fail to start the truck. I am going to use a battery disconnect switch to try to track down the drain.

Any advice, insight, or revelation will be greatly appreciated.

Best regards,

Jeff P.

[sirjeffro]

Sorry guys..... I meant to post this in the HD section. If any moderator wants to move it......