Jump to content
  • Sign Up

2006 Sierra 2500HD 6.0L No Crank


Recommended Posts

Hey everyone, I'm running out of ideas trying to find the source of this no crank condition. So this past weekend I replaced knock sensors, oil pressure sensor, engine ground strap, MAF and did some welding on the exhaust. It started up after welding. When going to start the truck, everything in the cab lights up. Dash, radio, interior lights, cab lights ect. Nothing happens when the key is turned to crank it. When the key is pulled out of the ignition, everything still has power and will not shut off. There is no communication with the OBD port so I can't hook a scanner to the vehicle. I've checked all of the under hood fuses and everything has power. Fuel pump is not priming also with the key on. I pulled the starter relay and hooked a jumper wire up to the 86 terminal and gave it ground with a power probe and the truck cranked and fired up until it ran out of fuel in the rail. This led me to believe I had a bad ECM so I replaced it today and nothing changed it did the exact same thing. Any help is appreciated!

Link to comment
Share on other sites

Problem has been posted many times but few post the solution. 1 that I recall is bad connections/corrosion in the under hood fuse box, another is bad grounds which are common to these trucks. probably will take some time checking voltage drops

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Forum Statistics

    247.7k
    Total Topics
    2.6m
    Total Posts
  • Member Statistics

    336,545
    Total Members
    8,960
    Most Online
    Lukasz Chmist
    Newest Member
    Lukasz Chmist
    Joined
  • Who's Online   0 Members, 1 Anonymous, 1,006 Guests (See full list)

    • There are no registered users currently online


×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.