GBCM delete - Hummer Forums - Enthusiast Forum for Hummer Owners

Hummer H3 For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.

GBCM delete

  #1  
Old 02-10-2019, 04:17 PM
Junior Member
Thread Starter
Join Date: Feb 2019
Location: Albuquerque New Mexico
Posts: 6
Default GBCM delete

I just bought an 07 H3 adventure. Have most of the bugs figured out except one. P.O. deleted the Generator Battery Control Module (GCBM), not body control module (BCM) as so many think. The alternator is charging. Battery is new but the battery light is on. I can find references to deleting GCBM but cannot find out if that's the cause of my light being on or if it can be turned off without replacing the the module. Any suggestions?
 
  #2  
Old 02-11-2019, 10:02 AM
Senior Member
Join Date: Oct 2011
Location: Wisconsin
Posts: 956
Default

Sadly, anytime p.o.'s get into that much modifications it's hard to know what they did or why.
Stab in the dark possibly the PCM was no longer able to regulate (because if memory serves me correctly GM moved the regulator into the main brain) so they decided to bypass the gbcm so to be able to still have a charging system function without the expensive PCM/ECM brain change. Jeep forum members do this frequently on older Cherokee. If it is charging and the truck is running just leave it. On the other hand if it will keep you from passing state inspections you may need to undo all the stuff done.
 

Last edited by Happy Hummer; 02-11-2019 at 10:04 AM.
  #3  
Old 02-11-2019, 01:17 PM
Junior Member
Thread Starter
Join Date: Feb 2019
Location: Albuquerque New Mexico
Posts: 6
Default

Originally Posted by Happy Hummer View Post
Sadly, anytime p.o.'s get into that much modifications it's hard to know what they did or why.
Stab in the dark possibly the PCM was no longer able to regulate (because if memory serves me correctly GM moved the regulator into the main brain) so they decided to bypass the gbcm so to be able to still have a charging system function without the expensive PCM/ECM brain change. Jeep forum members do this frequently on older Cherokee. If it is charging and the truck is running just leave it. On the other hand if it will keep you from passing state inspections you may need to undo all the stuff done.
unfortunately he did a lot and knows nothing. Took 4 hrs to get home (3hr drive)because the damned thing shuts down if I run 65 + mph and it starts pulling a hill. Cleaned t-body and replaced thermostat and maf. Plate it tomorrow and drive again to see if it's still happening. Still need encoder (he disconnected it) and fuel tank vent valve.
 
  #4  
Old 02-11-2019, 01:22 PM
Doc Olds's Avatar
Super Moderator
Join Date: Jul 2007
Location: Boat Town USA MI
Posts: 8,520
Default

What kind of Battery Terminal Connectors are you using?
 
  #5  
Old 02-11-2019, 02:14 PM
Junior Member
Thread Starter
Join Date: Feb 2019
Location: Albuquerque New Mexico
Posts: 6
Default

Right now just the lead clampdown generics
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
DanielH1
Hummer H1
0
04-10-2008 09:36 PM
alphadogg
Meets, Events, and Shows
6
02-14-2008 02:58 AM
donzi
PRIVATE For Sale / Trade Classifieds
0
12-08-2007 06:38 PM
JeepeaterH3
PRIVATE For Sale / Trade Classifieds
0
09-21-2007 07:56 AM


Thread Tools
Search this Thread
Quick Reply: GBCM delete


Advertising
Featured Sponsors

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.