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I personaly don;t need your software as my old snap-on MT 2500 does everything....thanks for the offer ...but I was trying to help out the regular Joe that doesn't have the bucks for outdated software.....since it's only good for 94-95 diesels....not many still kicking

We have some different laws here in Can-Ontario....you do an engine swap of anything but orginal they can only visual check pollution eqippment ....same year your FK'ed....or newer

That's great you came back to let us know.....my pleasure to make it easier....should check my new thread Free diesel software EH

Hey guys you might be interested in this free software if you have a laptop and can build or rig your own cables....anyways here's the link to the page.....lots of reading to get there if not just scroll down to Scanning and Tunning software......at the bottom of the list is another link 6.5...

Now that you replaced the ign swicth have NO MORE problems comumicating with the TEch 2 right.......it's a sure sign wiring or ignition switch problems when other than jumper scanners can't comunicate with ECM .computer Jumber scanners - paper clip A+B terms up to 1995

Wiring for 96 3500

https://www.rockauto.com/getimage/getimage.php?imagekey=3467808&imageurl=http%3A%2F%2Fimages.whisystems.com%2Fsmartpages%2Fpartinfo_resize%2FDCL%2F335-1041_Primary.jpg Like this oneCs144>140 amp

Have you guys pulled the insepection cover off and checked for a cracked flex plate {flywheel}

Testing charts

Did you check your line pressures.....will tell you quick.....they are phrone for leaky shift boost valves

Hope you slide back and tell us if your problem is solved EH .....plus I'am interested in finding out if your ELM 327 software program communicates now after the fix ......many others are probably wondering even if it's fixed or not

Click on the truck picture for the PDF file to open

This is what your looking to do know minus grounds and old security system

Did the extenda kit this morning......the truck is still claking fine .....700+ miles since the fix

When you put switch to start power is going threw ignition switch to the solenoid ...so it cranks......power may not be going out of the solenoid...that's the reason to check ......your right side battery has a fuseable link on the Positive post wire[black]runs over wheel well to the junction...

check your wires at starter......fuseable links at starter.....loose connections there

More Info here.... http://easyautodiagnostics.com/gmc/TAC/4.8L_5.3L_6.0L/app-sensor-1/app_sensor_test_1.php Not a 6.5 diesel but does apply...colours may differ....same test for diesels Thanks Manny

Here's the start how to check APP Sensor Assembly Connector Pin outs Pin Wire Color Description A Gray APP Sensor 3 -Ground B Purple APP Sensor 2 -Ground C Light Blue APP Sensor 2 -Signal D Tan APP Sensor 2 -5 Volt Reference Circuit E Yellow w/ Black stripe (or Brown) APP Sensor 1...

Humm did you test before you replaced it? at least a static test

Don't know ifin you have dumped the Opt sensor noise filter or not but in future you may want to ....as it does fool with fuel delivery problems.....cuts circuits to PCM and PMD when hot