Download Wiring Diagrams and Pinouts

Below is a list of GM wiring diagrams and pinouts I currently have available for download.  Some of these are ADOBE Acrobat .pdf format files in a .zip compressed folder.  You will need to unzip these files and open them with adobe reader. 

Click on a link below to start the download

 

How to wire up a 94-95 LT1 PCM to a 4T60-E transaxle

How to wire up the newer electronic cruise control to your Fiero

How to wire up the newer electronic cruise control to your Fiero if it didn't have factory cruise

How to convert a 2.8 Fiero ECM harness over to accept a 1227730 ECM when using a DISTRIBUTOR ($88 code mask)

How to convert a 2.8 Fiero ECM harness over to accept a 1227730 ECM when using a Distributorless Ignition System and a 3-wire A/C pressure sensor ($A1 code mask)

How to convert a 2.8 Fiero ECM harness over to accept a 1227730 ECM when using a Distributorless Ignition System and an A/C pressure switch ($88 code mask)

How to wire up a 2.8 Fiero ECM harness to work with a 1227727 ECM when using a DISTRIBUTOR ($88 code mask)

How to wire up a 2.8 Fiero ECM harness to work with a 1227727 ECM when using a Distributorless Ignition System ($A1 code mask)

Fiero C203 and C500 connector pinouts

4T60-E / 4T65-E Trans Range Switch (Gear Position Switch / Neutral Safety Switch) Fiero wiring instructions

 

How to wire up a 1996 3800 L36/L67 OBD-2 PCM into your Fiero

Works with PCM Service numbers:

 

How to wire up a 1997 3800 L36/L67 OBD-2 PCM into your Fiero

Works with PCM service number:

 

How to wire up a 1998-2002 3800 L36/L67 OBD-2 PCM into your Fiero

Works with PCM service numbers:

 

How to wire up a 2003 3800 L36/L67 OBD-2 PCM into your Fiero [only use if you have a 2003-newer 4T65-E transmission]

Works with PCM service numbers:

 

How to wire up a 3800 PCM from a 1994-95 C/H/G-body car or U-body Van to run a 3800 Series 1 L67/L27 in your Fiero

TPS wiring differs between Series 1 and Series 2 engines, make sure you are using the correct instructions for your engine type. 

Works with PCM service numbers:

 

How to wire up a 3800 PCM from a 1994-95 C/H/G-body car or U-body Van to run a 3800 Series 2 L67/L36 in your Fiero

TPS wiring differs between Series 1 and Series 2 engines, make sure you are using the correct instructions for your engine type. 

Works with PCM service numbers:

 

How to wire up a 3800 PCM from a 1994-95 Buick Regal to run a 3800 Series 1 L67/L27 in your Fiero

TPS wiring differs between Series 1 and Series 2 engines, make sure you are using the correct instructions for your engine type. 

Works with PCM service number:

 

How to wire up a 3800 PCM from a 1994-95 Buick Regal to run a 3800 Series 2 L67/L36 in your Fiero

TPS wiring differs between Series 1 and Series 2 engines, make sure you are using the correct instructions for your engine type. 

Works with PCM service number:

 

How to wire up a 1998-1999 3100 or 1998 3400 V6 OBD-2 PCM using a 4T60-E or manual transmission into your Fiero

Works with PCM service numbers:

 

How to wire up a 1999-up 3100 or 3400 V6 OBD-2 PCM using a 2002-older 4T65-E transmission into your Fiero

Works with PCM service numbers:

 

Please report any broken links to this email

 

Goto: www.gmtuners.com for more information and featured vehicles.