Well, I answered my own question from an earlier post in the 08-up TC general discussion. I bought an 09 SS/TC Cobalt that didn't have the UAF(multiple informatin display). There was one or 2 people that did add it to theirs but had to buy the whole instrument panel wiring harness. I wanted to find an easier way. Here it is:

Sorry I don't have any pictures of the actual install.

I received my UAF display which included the windshield trim to replace my original piece. I also ordered the mating 8 wire connector for the new part since the original is only a 4 wire. Those 2 pieces are the only parts that I purchased. Below is what I did to make it work. I used scotch-locks to fasten a couple of my wires to the factory wiring but you can use whatever you prefer.



After purchasing these 2 numbers:

20831940 - MOLDING ASM-W/S GARN *GRAY
Dealer Price $351.12 List Price $616.00 Trade Price $462.00

15306407 - CONNECTOR-W/LEADS, 8-WAY F. *BLACK *MATH DATA
Dealer Price $62.47 List Price $124.91 Trade Price $87.44

1. removed original trim by removing the torx screw on the top behind the round plug and pulling slightly to release the 2 clips
2. disconnected the 4 wire connector from the factory analog boost guage
3. get the 15306407 connector and trim the excess wire off of wires coming from pins C and H leaving around 3 inches from connector
4. scotch-lock wire from pin C of 6407 to the pink wire (pin A) from original boost guage connector
5. scotch-lock wire from pin H of 6407 to the black with white stripe wire (pin D) from original boost guage connector
6. completely cut off wire from pin G of 6407 because it is not used
7. tape up the 4 wire connector with other wires connected because your finished with that connector
8. run other 5 wires down behind the DLC (the 16 pin connector that you hook your scan tool to). I had to lengthen them about 6"
9. scotch-lock wire from pin D of 6407 to the red with white stripe wire (pin 16) of the DLC
10 cut both the High Speed GMLAN wires (tan with black pin 6 and tan pin 14) and leave enough room to install butt connectors. I left about 4" from the DLC
11 connect wire from pin E from 6407 to tan with black stripe wire coming from factory wiring harness you cut earlier
12 connect wire from pin F from 6407 to tan wire coming from factory wiring harness you cut earlier
13 connect wire from pin A from 6407 to tan with black stripe wire going to the back of the DLC side (pin 6) you cut earlier
14 connect wire from pin B from 6407 to tan wire going to the back of the DLC side (pin 14) you cut earlier
15 Hide all your wires and install the pillar trim by aligning the 2 clips and installing the torx screw on the top


Pin Wire Circuit Function

A PK 439 Ignition Voltage
B GY 8 I/P Lamps Dimming Signal
C TN 891 Boost Gage Signal
D BK/WH 651 Ground


Pin Wire Circuit Function

A TN/BK 2500 High Speed GMLAN Serial Data (+)
B TN 2501 High Speed GMLAN Serial Data (-)
C PK 339 Ignition Voltage
D RD/WH 1440 Battery Positive Voltage
E TN/BK 2500 High Speed GMLAN Serial Data (+)
F TN 2501 High Speed GMLAN Serial Data (-)
G -- -- Not Used
H BK/WH 651 Ground


Pin Wire Circuit Function

1 D-GN 5060 Low Speed GMLAN Serial Data
2-3 -- -- Not Used
4 BK 550 Ground
5 BK/WH 1051 Signal Ground
6 TN/BK 2500 High Speed GMLAN Serial Data (+)
7-13 -- -- Not Used
14 TN 2501 High Speed GMLAN Serial Data (-)
15 -- -- Not Used
16 RD/WH 40 Battery Positive Voltage

 

interesting, i wonder if this is possible for the lsj or any other versions of the cobalt

as long as all the pids are the same it should work no?

 

yeah, can someone confirm this for the lsj?

 

X2 yea will this work for the base modles aswell?

 

I'll definitely bet on a no on the LSJ and a sure as hell no on the 2.2. Both have completely different ECUs than the LNF.

 

Nice write up! I've gatta Do this on mine when I get some spare cash.

 

WHERE DID YOU PURCHASE YOUR PERFORMANCE DISPLAY.....THE PARTS DEPARTMENT AT MY DEALER IN ORLANDO FLORIDA WILL NOT GIVE ME ANY INFORMATION.....HE WANTS 496.00 FOR IT. I WANT IT BUT I AM ALSO LOOKING FOR THE BEST PRICE.

Thanks!

 

sigh noobs bumping up old threads