no ac with efi???

[nasty6.6]

I have no ac with the attempted dp5 efi tune but the other truck the tunes on works fine?!? No ac request from ecm when tune is in the ecm but ac works normally without tune in the ecm. Anyone else had this problem? Put the wires in 49 and 69 on the blue connector of the ecm, the switch works through all the tunes just no ac...

 

[Kat]

http://www.duramaxdiesels.com/forum/showthread.php?t=5671&highlight=efi+ac

Here is a thread.. Hope it helps:thumb:

 

[Chevy1925]

I have no ac with the attempted dp5 efi tune but the other truck the tunes on works fine?!? No ac request from ecm when tune is in the ecm but ac works normally without tune in the ecm. Anyone else had this problem? Put the wires in 49 and 69 on the blue connector of the ecm, the switch works through all the tunes just no ac...

Your gunna need to find the right OS for a DSP5 to make your AC work. my 02 had this issue and my tuner went through a bunch of different ones with me to get the AC to work.

 

[nasty6.6]

thanks for the information!