2004 GMC Sierra help needed. Quick

[readymix]

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.

 

[readymix]

Top

 

[ryan22re]

Could have set when Tranny lost power from fuse blowing.

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

 

[readymix]

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.

 

[ryan22re]

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.

 

[ryan22re]

Ahhh yes, 2761 is torque converter clutch solenoid circuit.

Problems he has, yes.

 

[readymix]

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??

 

[ryan22re]

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.

 

[readymix]

What could it have damaged?

 

[ryan22re]

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.

 

[readymix]

Me too since all the codes are electrical codes