Hummer Forums - Enthusiast Forum for Hummer Owners

Hummer H2 For those who like a little more gleam to their Hummer, the H2 offers a similar rugged look as the H1, but as a lower cost, and with more added features, making it almost a massive luxury SUV.

H2 duramax conversion

Thread Tools
 
Search this Thread
 
  #1  
Old 04-19-2024, 01:25 PM
harvey's Avatar
Junior Member
Thread Starter
Join Date: Jan 2022
Posts: 3
Default H2 duramax conversion
hello, need help if possible i converted my 2003 H2 to Duramax lly, so got everything running or almost i guess, my truck starts for quick half second then shuts off, checked everything possibly i could see, all harness connected, it feels like there's some kind of module or security system that prevents the engine to run, and it cuts down and shuts the engine
 
Reply
  #2  
Old 04-19-2024, 02:17 PM
bronxteck's Avatar
Senior Member
Join Date: Apr 2019
Location: BX NY North East
Posts: 2,754
Default
did you remove vats from the ECU? if not you need to.
 
Reply
  #3  
Old 04-19-2024, 02:26 PM
harvey's Avatar
Junior Member
Thread Starter
Join Date: Jan 2022
Posts: 3
Default
No, my computer won't connect
 
Reply
  #4  
Old 05-05-2024, 02:55 PM
Brunob00's Avatar
Senior Member
Join Date: Jun 2021
Location: Pittsburgh
Posts: 148
Default
Talk to @bknapp ... he has done a bunch of duramax conversions and may be able to help...
 
Reply
  #5  
Old 05-06-2024, 03:51 PM
bknapp's Avatar
Member
Join Date: Jan 2009
Posts: 31
Default
Did you get an efilive license?
 
Reply
  #6  
Old 06-09-2024, 08:56 PM
chazz3285's Avatar
Junior Member
Join Date: Jun 2024
Posts: 1
Default
Originally Posted by harvey
hello, need help if possible i converted my 2003 H2 to Duramax lly, so got everything running or almost i guess, my truck starts for quick half second then shuts off, checked everything possibly i could see, all harness connected, it feels like there's some kind of module or security system that prevents the engine to run, and it cuts down and shuts the engine

what did you do for radiator support and shifter bracket ?
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
First ever AWD H2 Duramax/Allison conversion
bknapp
PRIVATE For Sale / Trade Classifieds
10
12-11-2019 06:19 PM
Duramax Diesel conversion
FoxHummer
PRIVATE For Sale / Trade Classifieds
11
03-22-2013 11:23 PM
Duramax or Cummins- which engine conversion?
iansilv
PRIVATE For Sale / Trade Classifieds
0
06-24-2012 01:05 AM
Duramax conversions pricy?
tavion2378
PRIVATE For Sale / Trade Classifieds
15
03-29-2012 12:10 AM
Duramax conversion mechanic in MICHIGAN?
spartanfootball
PRIVATE For Sale / Trade Classifieds
0
02-09-2012 08:24 PM
Tags
Back to Subforum
Hummer H2
View Next Unread
2008 H2 Running Board Replacement




Advanced Search
Quick Reply: H2 duramax conversion


Reply Closed Thread Share

All times are GMT -5. The time now is 12:31 PM.