2015 - TDP Begins Its 20th Year
What's New: | Feature Articles: | Product Reviews: | Member's Area: | Subscribe:
Duramax 6600 Diesel Page | Advertiser's Section | Classified Ads | Photo Album | Diesel Books, GM Licensed T-shirts

Go Back Forums > Chevrolet & GMC 2500HD/3500 Light Trucks > Duramax 6600
Register FAQ Members List Photo Album Mark Forums Read

Duramax 6600 Discussion Forum for the Duramax 6600 Diesel Engine, including the LB7, LLY, LBZ & LMM engine specific topics.

Thread Tools Display Modes
Old 05-18-2012, 06:43 PM
VDZdmax VDZdmax is offline
Join Date: Mar 2010
Posts: 1
Default 2003 2500HD won't turn over...any ideas?

I have been having erratic starts out of my 2500HD. Lights come on like normal and when you turn key after glow plugs go out nothing happens. No bump, no grind, nothing. All the dash lights go out like the batteries are dead, but let up on the key and everything comes back. Try it later, or again and it may start!? I have changed out the neutral safety switch, had a repair shop tell me it was the starter( it wasn't), and now they are stumped. I am wondering about the ignition switch, but don't like swapping parts just to "try" a fix. $$$ Batteries are fine. I thought I had seen a thread on this very problem, but can't seem to locate it. Was hoping someone a little more savvy on the searches could point me in the right direction...
Reply With Quote
Old 05-18-2012, 07:30 PM
DmaxMaverick DmaxMaverick is offline
Join Date: Apr 2001
Location: CA
Posts: 10,971

Welcome aboard!

It could be a number of things. The most common is a poor connection at the batteries, starter or grounds. There's also a starter relay in the underhood fuse box (over the driver side wheel well). The ignition switch is a possibility, just less common.
1985 Blazer 6.2
2001 GMC 2500HD D/A
2014 Chevy Cruze Diesel
Reply With Quote
Old 05-19-2012, 11:06 AM
Hound Hound is offline
Join Date: Feb 2002
Location: KG, Va
Posts: 108

Have you had your batteries load tested?
'02 2500HD CC SB 4X4 D/A, Kennedy headlight kit, OilGuard bypass, Nicktane fuel filt, Pred 1.04, Autometer Ultra-Lites, ARE Z-Series, DX-959, KL203, Xferflow filler kit, Kennedy twin lift pump kit, Alpine CDE-HD137BT, JL Audio C2-650X Evolution Series speakers
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -7. The time now is 11:24 AM.

Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
Copyright 1996-2014 by - All Rights Reserved