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I started to connect my ECM, TAC and pedal and didn't have the right TAC to Pedal wiring harness. I'm not sure exactly what I have or how know if it's compatible. It wasn't purchased together..
My ECM is #12200411 - from what I understand its from a 2002 GMC Sierra 5.3L
My TAC is # 12571991 - based on what I can see, it should be a match. Someone point me where I can know for sure. It uses connector number 15318071 for the TAC to pedal wiring.
My pedal has no markings. It has a bar code that does not show anything when entered on the internet. It also uses connector number 15318071 from what I can tell. Attached are pedal pictures.
How do I know if this is all compatible? I've read so many conflicting things on TAC and Pedals and want to know if I need to scrap what I have or if it should work.
Post a photo showing the entire connector not just the connector. If I can see the entire pedal I can let you know which Pedal to Module Harness you need and also whether it's compatible. Also verify that you TAC module is completely plastic and doesn't have any metal bracket on it. If it's completely plastic then it should work fine!
Hopefully this gets you what you need jcvett56. I really appreciate the help.
The wiring connectors are from the TAC to pedal wiring harness from EFIconnection.com for the 2002 truck configuration I thought I needed.
I picked up the pedal from eBay and seem to recall it was from a Corvette but I think I've read the pedal was the same in the Corvette and the truck for early drive by wire years. (I'm not sure if that means they worked the same or if the connectors are the same)
When my cable didn't fit, I got all confused and worried about compatibility because I don't know exactly what I have.
This link indicated trouble with the TAC that I have but I'm not sure if the problem was the TAC or the pedal? I think when I ordered it, I had read any TAC with the all plastic body would fit my application. I'm not sure if that's correct or not.
The obvious advice I get from everyone is to make sure the TB, pedal assembly and TAC are from the same year (Duh!) I don't have that luxury so I'm relying on someone who'd gone beyond the obvious and knows the inner workings and electronics of each.
I appreciate all the help.
Cabling from EFIConnection.com for truck - TAC to pedal.
Black connector from TAC to pedal wire plugs in to the TAC just fine but the grey connector doesn't.
Here you see the black connector also fitting the pedal assembly.
i spent a couple days doing my own research. I found lots of mis-information on the Internet so here's my findings.
While many sites indicate the 2000-2002 truck pedal is interchangeable with the 1997-2004 Corvetee, the Delphi connectors on the truck is different which also represents a difference in wiring of the TAC-to-pedal harness.
Oreilly's lists Dornan part number 698-102 which is just the sensor part of the pedal for the truck.
So in my case, I can spend $60 at to change the pedal sensor or I can buy the black Delphi connector and repinning one end of my existing cable for $10.
Here are the differences in wiring between the truck and Corvette.
Now the only question is will my TAC work with this pedal?
I don't have specific information for you, but I can tell you that those connectors are Depli MetriPack 150 series. The colors are not just for show but represent different alignments between male and female connectors. So gray goes with gray, black with black, etc...The same connectors are used for the ignition coil harness, but they are white. You can source all these from Waytek or Mouser and many other places.
I'll throw in my experience with DBW so that you will have a bit more info. I have a 2003 LM4 which I got the TAC and pedal from. Of course I sent the ECU off to program out the VATS, etc. Everything worked fine when I ran the car in the garage but under load it failed to limp more above about 30% throttle. I think the code was U0101 which is a communication problem. After doing much research and trying different pedals I stumbled on the combo of 1582777 pedal and 12588923 TAC. Upon further investigation discovered that the tune was 2005 because GM had several updates which rendered my combo mismatched.
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How to ID Pedal compatibility 
