Need wiring help
 

2000 Chevy Blazer, 4 door, 4wd, 4.3l Vortec

Hi there I need help with some wiring. I need pinout info and or diagrams for the PCM / ECU / Computer (whatever you want to call it) There are four small harnesses going into it and are labeled on the unit as Red, Blue, Black and White. If someone has a diagram and or pinout of these it would be very very appreciated. Also On my fuel pump there are 2 connectors, a square one with 4 wires and a oval one with I believe 3 wires. On the square one the wires are Purple, Gray, Black, and Black w/ White stripe. If someone could itentify all of these for me that would be awesome! I know the purple is for the fuel level sending unit but I am unsure of the other 3 in the square connector. As for the oval conector I thing that is for the fuel tank preasure switch but I could be wrong. My wiring diagram is giving me conflicting info.

Bump. Surely someone has these diagrams.

You need to search and you need to do alot of it. heres the problem; for all the diagrams i was able to find, they were incorrect. there are a whole bunch of diffrent pinouts depending on things like year and engine size. i litterally stumbled around just to find the correct tach wire because the pinouts i found were not correct. so short of purchasing the actuall diagrams from the dealer or getting a book or peice of software or whatever, good luck. use a multimeter and test wires before you commit them to being a certain pinout! did that make sense? what i mean is dont just asume a pinout u find is correct and wire it up that way or u may fry something. hope it helps. also try checking over s10 forum.

Long overdue BUMP. Anyone have these diagrams?

These should cover it. I've posted them before...
http://i11.photobucket.com/albums/a1.../th_PCM_C1.gifhttp://i11.photobucket.com/albums/a1.../th_PCM_C2.gifhttp://i11.photobucket.com/albums/a1.../th_PCM_C3.gifhttp://i11.photobucket.com/albums/a1.../th_PCM_C4.gif

Along with the fuel pump:
http://i11.photobucket.com/albums/a1..._connector.gif

You are correct on the fuel pressure sensor connector.

All of the above is applicable to the 2000 model year s-series trucks.

I bow in your pressance sir1:) Thank you!

My pleasure.

Would it be too much to ask if you if you also have the diagram for the instrument cluster pinout (Speedo, Fuel, Etc). Last one....I promise!

1st off let me say big belated thanks to swartlkk for posting the diagrams i needed!

However, I am still at a loss. My fuel gauge is still on E and the "low fuel" light is still on. I have confirmed that my sending unit/pump is good (brand new from dealer, after my cheap ebay one failled after only 2 weeks). The new pump also came with a new plug that I wired in. I have confirmed that all of the wiring to the computer is good ( I ran new wires). I have also confirmed that my entire instrument cluster is good also (replaced with a known good unit). Does this mean that my computer is bad?

According to the cluster pinout diagram, there is no wire directly feeding the fuel gauge from the computer. I am assuming it is getting its info from one of the serial data wires (pin A6)? If this is correct I guessing this means my computer is bad? The only other clue in the mystery is that my check engine light is on and and giving a code that my "fuel canister purge valve solenoid" is bad. Could that have anything to do with it?

Any and all feedback/suggestions will be much appreciated.