How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask goodwrench9124 Your Own Question
goodwrench9124, ASE Certified Technician
Category: Chevy
Satisfied Customers: 3432
Experience:  Ase Master Certified, GM Master Certified Tech. Awarded GM Top performer, Hybrid certified
Type Your Chevy Question Here...
goodwrench9124 is online now
A new question is answered every 9 seconds

2003 chevy: 4X4..the duramax and allison transmission..malfunction

Customer Question

transmission trouble on 2003 chevey 3/4 ton 4X4 with the duramax and allison transmission and the transmission started messing up and is throwing a P0700 transmission control system malfunction. what exactly is that? and what does it take to fix it?
Submitted: 8 years ago.
Category: Chevy
Expert:  goodwrench9124 replied 8 years ago.

Hello, and welcome. the Code P0700 is a code generated by the PCM, the PCM sets this code, by a detected fault in the trans control module. in short the transmission module will have to scanned for the trans code to know what the actual fault in the transmissin is. here is a description how this code is set.


DTC P0700

This diagnostic trouble code (DTC) indicates that a related transmission DTC set in the transmission control module (TCM). The engine control module (ECM) receives the TCM DTC information over the serial data circuit. The ECM turns ON the malfunction indicator lamp (MIL) when the TCM sends a message over the serial data circuit requesting MIL illumination.


The ECM receives a serial data message from the TCM, in order to illuminate the MIL.


If there is anything you dont understand, Please ask me to explain.