Question about GMC Savana Cargo

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Can,t find tech wire at pcm 2007 gmc van purple wire

For remote starter

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  • Jeremy W.
    Jeremy W. Feb 08, 2012

    what engine?

  • geo1955 Feb 08, 2012

    found it pin 26 PCM on front left fender(very hard getting to it !) 4.8L eng.

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  • Master
  • 577 Answers

You can also find it @ #1 coil..same purple wire , probably easier to get to !

Posted on Feb 09, 2012

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ftw1952
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SOURCE: 02 montana van no

replace the ignition/ neutral saftey switch mounted on the trans by the shift cable

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SOURCE: pcm is not grounding injectors. need a pin diagram and ground location diagram

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Posted on Nov 23, 2011

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A recall on all Montana's 2000-2005 for a elec. plug behind drivers seat gets corroded and causes a no start at purple wire.I hate to take up carpet that far to find, anyone no where exactly it is?


Where did you hear that one at . There isn't anything ,no connector ,no purple wire that gets corroded . Without proper service information , wiring diagrams etc... This diagnoses could take sometime . There is a ppl wire from the PCM / Crank fuse 10amp located in the instrument panel fuse box . When you turn the key to start B+ voltage is supplied to that fuse . from there it goes to the PCM crank sense input . From there the PCM energizes the starter relay sending B+ voltage to the starter solenoid . Turning over the engine . Suggest you look at a wiring diagram at http://www.bbbind.com/free_tsb.html Enter your vehicle info. year , make , model , engine size . System (engine ) Subsystem (starting )

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On a 1997 GMC Savana van, the heated oxygen sensor pre-converter for the right side has wires: tan from A7 (on the PCM) to pre-converter and purple back to A21 on PCM. The left side sensor has a tan/white...


Look it up here http://www.bbbind.com/free_tsb.html free wiring diagrams , Enter vehicle info. year , make , model and engine size .
Under system click on engine , under subsystem click fuel controls . Click the search button , then the first blue link . The 7 th diagram down is for O2 sensors . The ppl wire to pin 21 is signal return , the tan to pin 7 is low ref, ( ground ) Tan / white pin 26 low ref.(ground ) PPL / white pin 22 signal return .

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im looking at that circuit , on the start relay on your radiator support , red is always hot via fusible link , purple to solenoid as you say , orange/black wire should be hot in run or start mode , if it is not the fuse for that wire is PCM/ABS 10 amp located fuse block in driver door jam , it does go through the nuetral saftey switch , the yellow wire going to the PCM must ground that relay to activate start mode . last note there is a PCM/CRANK fuse in the driver door jam also , 10 amp , if all this is good i would like to hear more . 1 more note about the nuetral saftey switch is the pink wire going in and the orange/black wire coming out should have continuity in park and nuetral ....let us know thanks

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