Web2004 chevrolet silverado 1500 fuse box diagram. Auxiliary power [single battery and diesels only]/ dual battery (tp2) do not install fuse. Left bussed electrical center,. Webi've been having some issues with my battery draining if i let my tahoe sit for a week or so. I realized it was happening when my alarm kept going off and nothing. Reading out the stock program. Plug the autocal into the truck’s obdii using supplied cable. Turn the key to the on position (do not start the truck). Webdisrupting power to those will only cause confusion. You need a voltmeter with mv reading and sharp probes. Probing each side of a fuse will help identify where. Webthe 2003 chevrolet silverado 2500 has 3 different fuse boxes: Chevrolet silverado 2500 fuse box diagrams change across years, pick the right year of your vehicle: For chevrolet silverado (gmt800) first generation 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007. Webgmc sierra fuse box diagrams change across years, pick the right year of your vehicle: Webi'm the new owner of a 03 lt. The battery goes dead over night. I did a battery drain test with my multimeter and foundler. A 0. 3amp draw. I first started under. In this article you will find a description of fuses and relays gmc, with photos of block diagrams and their locations. This is called the truck body. Webthe tbc batt fuse should be in the under hood fuse block. I have attached a diagram below and circled the fuse location. Please let me know if i can be of any further. Webi have a 00 tahoe that i’m getting a draw on the tbc fuse in the under hood fuse box. It’s enough to kill battery in about 2 days. The draw is around. 83. Webyou need to find out what output the tbc fuse powers. Pulling one of the inside fuse panel fuses, like tbc1, or tbc2 should help narrow it down. Posted on feb 11, 2012. This fuse is for the body control module, so your draw is probably something controled by the bcm. Webi was wondering what could be the culprit in blowing tbc batt fuses? I had to stick a 30a fuse in just to get home the other day. It blew the 10a, 15a, and a 20a fuse. Webthe three fuses i identified were atc (transfer case) and tbc (truck body computer) in the engine compartment fuse block and rdo batt (radio, battery) in the. Webi'm guessing your problem is tied somehow to the left fuse block at the end of the dash. See page d28 and then look for 'tbc' anywhere you can find it in the. Webthe power from that fuse goes to nothing else, only the bcm. Since you have aftermarket items on the vehicle it would be a good starting point to disconnect them and see if the. Webthis fuse is for the body control module, so your draw is probably something controled by the bcm. Get a manusl, get a list, and eliminate them one by one. Webthe tbc fuse kills the draw but we have no idea what that powers in the bcm. Is it a input causing the issue or is it a output? There is no schematics for internal.