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2004 GMC Sierra help needed. Quick

Discussion in 'The Garage' started by readymix, Jun 21, 2006.

  1. readymix

    readymix 3/4 ton status

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    Well, I had a friend call me asking for help. Problem is that he is stationed on the other coast "right side".

    He was wiring electric fans in his 2004 GMC sierra 2500 and blew a 30A fuze in the engine compartment. Now he has the following OBD codes:
    P0753 - Shift Solenoid ‘‘A’’ (No. 1) Electrical
    P0758 - Shift Solenoid ‘‘B’’ (No. 2) Electrical
    P2761 – ????



    Does anyone have any good electrical schematics or a good T/S guide.
     
  2. readymix

    readymix 3/4 ton status

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  3. ryan22re

    ryan22re 1/2 ton status

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    Could have set when Tranny lost power from fuse blowing.

    Does it move? Run ok? Or is just the light on.
     
  4. readymix

    readymix 3/4 ton status

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    Reset the codes. They come back as soon as truck is started. Don't even need to drive it.

    The truck moves and drives fine from what he said.
     
  5. ryan22re

    ryan22re 1/2 ton status

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    Any idea what fuse blew? I'm having a hard time making a connection. Unless he physically shorted the shift solenoids. No idea on the P2761. Thats a GM specific code. Mind drawing a blank.

    Unless for some reason he is using the 12 volts to the tranny (just happened to find that wire in the loom) to run the fans or actuate a relay or something, I dunno.
     
  6. ryan22re

    ryan22re 1/2 ton status

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    Ahhh yes, 2761 is torque converter clutch solenoid circuit.

    Problems he has, yes.
     
  7. readymix

    readymix 3/4 ton status

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    He is still trying to trace the circuts. He said the wire he tapped into was under the fuze/bass box in the engine compartment. It was a Pink wire??
     
  8. ryan22re

    ryan22re 1/2 ton status

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    Yep, most all pink wires are 12 volts. I would be that that is his problem. Tapped into the 12v wire that goes to the tranny.
     
  9. readymix

    readymix 3/4 ton status

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    What could it have damaged?
     
  10. ryan22re

    ryan22re 1/2 ton status

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    Possibly, maybe it's just screwing with the circuit and setting the codes.

    I'm really surprised that it would shift at all if that really is what happened.
     
  11. readymix

    readymix 3/4 ton status

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    Me too since all the codes are electrical codes
     

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