How to: Install DIC in gmt400 overhead console

[outalne94z71]

Are the functions of the wires the same though? or are they different than what I had posted?

they are the same function if you compare the pinouts, just different color wires

 

[1997chevydriver]

Oh ok just checking my info that I posted in the OP.

 

[outalne94z71]

right now without changing the wiring or soldering, when i turn on ignition it has readings(avg mpg 999 avg speed was 256 lol) for the same 30 sec that it will show temp and then goes to -- for everything except compass, so hopefully it will work with larger wire(fishing line is bigger than what i am using now) if not then maybe it does not work with diesel

 

[1997chevydriver]

Are you sure you have the correct VSS and class 2 serial data wires?

 

[outalne94z71]

it is #16 on the radio for the vss which is dk green/white and then the purple wire on the aldl connector for the serial 2

if for whatever reason that vss wire wont work then i will wire it directly at the drac where the vss signal comes from

 

[1997chevydriver]

If that doesn't work, and bigger wireing don't work I guess it dont work on diesels........... Keep me updated!

 

[Hezsus]

I used 18 or 20ga wire for mine, looks like you got the wires right.. they're a pain. I tested my VSS by measuring the voltage and driving around my shed. It is possible that it dosent work on the diesel trucks, since they are missing some sensors that the gassers have in the air intake, and from what I understand they use the incoming air and a/f mixture to calcuate the mileage, could be wrong but thats how my obd2 software does it.. theres a few diferent way too though.

 

[outalne94z71]

tied larger wire to it without solder and same deal, all the displays exc remaining fuel work for about 60 sec and then go to --, the average speed is way off too it gets up to about 368 mph avg just backing up, i need to find someone with a s10 or bravada with a display to plug mine into to test it and get an idea of what is going on.

 

[1997chevydriver]

This is going into the 98 right?? I tested it in my truck before I shipped it and everything was working fine I wonder if it's not something to do with it being a diesel...........

 

[outalne94z71]

This is going into the 98 right?? I tested it in my truck before I shipped it and everything was working fine I wonder if it's not something to do with it being a diesel...........

yes the 98, how long did you test it for? it seems to stop displaying after what seems about a minute and then only the compass functions so if you only quick tested it for less time than it takes to stop displaying then in theory it could still be the unit but i have a feeling you are right and it may just be the fact that this truck is a diesel but then again its still obd II and hooking a snap on m2500 to it displays the throttle so you would think this display could see that signal too.
it does recognize when it does the -- thing that the temp sensor is hooked up as the farenheight F is displayed until i unhook that lead and if i hook that wire back up the F pops back on, the light dimming works properly so that also is hooked up right.

i may just try to hook it up to the 98 k3500 gasser that my buddy has and see if i get the same result if i cant find anyone close with a s-10/bravada/astro with the dic, maybe i did something to it while hooking it up, who knows, at this point i just wish the temp worked as that is what i would have used it mostly for anyway.