obd2 problems

Discussion in 'GM Powertrain' started by 4x4CountryBoy2500, Nov 3, 2008.

  1. 4x4CountryBoy2500

    4x4CountryBoy2500 New Member

    I have a 2003 silverado 2500 4x4 with a 6.0 liter engine in it I bought it used. It has magnaflow exhaust on it. Im having problems with the obd2 port. I have a genysis scan tool which is top of the line right now but i when i hook it to my truck it says it does not have a connection and it does it with every other scan tool i hook to it also. Ive checked all the fuses and non of them are blown. Can someone help me out please? I have no check engine lights on but i want to get it fixed because i want to put a superchips cortex programmer on it
  2. dwill3015

    dwill3015 Epic Member 5+ Years ROTM Winner 1000 Posts

    Welcome to the site! We have a few members here with some knowledge on that sort of this so i'm sure they well reply soon.
  3. MrShorty

    MrShorty Epic Member 5+ Years 1000 Posts

    The usual reason for that behavior is no power to the diagnostic port: usually a blown fuse. If you are certain all of the fuses are good (it seems that it's usually a cigarette lighter or accessory power fuse), then I'd get a wiring diagram and figure out if the diagnostic port has power.
  4. CarpenterGuy

    CarpenterGuy Epic Member 5+ Years 500 Posts

    Roll Tide!!!
  5. 4x4CountryBoy2500

    4x4CountryBoy2500 New Member

    Man I preciate your help mr.shorty and ROLL TIDE TO YOU 2 CARPENTER!!!!!!!!!!!!!!!!!!!!!!!!!!! THEM BOYS LOOK GOOD THIS YEAR DONT THEY?!
  6. S1lverad0

    S1lverad0 New Member

    Hi, Did you ever get your Diagnostic Port to work ? .... I having the exact same problem with a Hypertech Max Energy Programmer i just bought .... no display what-so-ever ... the fuses in the dash (left side of steering column) are good .... Is it a fuse under the hood ? ..... i have a 2003 Silverado 1500 Z71 5.3L

    Thanks for any help,
  7. Mean_Green_95

    Mean_Green_95 Epic Member 5+ Years 1000 Posts

    not to start a fight or anything, but ummm...

  8. cascott325

    cascott325 Epic Member 5+ Years 1000 Posts

    welcome to the club
  9. S1lverad0

    S1lverad0 New Member

    Diagnostic Port is Working Now !!!

    Thanks, Awesome Forum ...... BTW, i got my Diagnostic Port Working for my Max Energy Hypertech, there were 2 fuses out in the Fuse Box under the hood, a Cig Lighter & SEO fuse were blown .... i replaced them and my Diagnostic Port started working ..... which is kinda funny because my Cig. Lighter was working with that fuse blown.

Share This Page

Newest Gallery Photos