Chevy S-10 4WD Problem- Theft / Security Light

2003 Chevy S-10 ZR2 4x4 4.3 L Vortec.
I REPLACED THE TCCM. Question:
THE FOUR WHEEL DRIVE DOES NOT WORK AT ALL. THE TRANSMISSION WAS REBUILT IN THE SPRING AND WHEN I WENT TO ENGAGE THE 4WHEEL DRIVE THIS MONTH, NOTHING WORKS. THE PUSH BUTTON SWITCHES FOR THE 4X4 ON THE DASH DOES NOT LIGHT UP. WHEN HOOKED UP TO THE SNAP-ON MODIS SCANNER, IT SAYS THERE IS NO COMMUNICATION WITH THE TRANSFER CASE. IT DOES COMMUNICATE WITH EVERYTHING ELSE. I CHANGED THE TCCM AND NO LUCK. I LOOKED AT A WIRING DIAGRAM AND THINK THE NUMBER 6 PIN SHOULD HAVE POWER, IT DOES NOT. I DO NOT KNOW WHAT TO DO NOW? ANY HELP?

Answer:
A long as you are looking at the correct schematic- there are 2 different transfer cases, so 2 different modules- then yes, pin 6 should have power. First check the fuses. If all OK, you are going to have to trace that wire. Then you will need to check for that circuit having continuity through the relay block.

There could actually be an open circuit inside that. As a last resort, you could actually run your temporary own wire to make sure this fixes your problem.

We had the starter replaced on our 2001 s10 and a day later the while driving the security light came on and is staying on, could you please tell me what this could be.

Answer:
I really doubt is has anything to do with the starter replacement, probably just coincidence. When the security light comes on and stays on, there is a problem with the theft deterrent system on the truck. Usually a problem the ignition cylinder/housing which contains the Passlock sensor.

We do not have a chip key so would this still be the problem. Yes. Your truck uses a Passlock sensor on the ignition housing itself, not the key. You would really need to get any trouble codes retrieved from the computers on the truck to see exactly what the problem is. But what usually goes bad is that Passlock sensor.

Question:
My S-10 would go down the road fine and then it would die out like it was running out of gas. It seemed like it would do that after the engine got warmed up. After it sits for a little while, it will start back up. I thought it might be the fuel pump but I can hear it run when I turn on the key. I haven't checked to see if it has fire or fuel at that point because I was not in a position to do so when the problem occurred. Any suggestions?

Answer:
I would check fuel pressure first. Even if you can hear the pump running, that doesn't mean that it's producing enough pressure or volume to run the vehicle. You should have a reading of 55psi with the key on, and it should hold steady and not fall off. The fuel filter should be checked too, since if it's clogged badly, it will restrict the fuel getting to the engine and cause a situation like you describe as well.

If you've got a lot of miles and have not changed the distributor cap and rotor, and ignition wires and plugs, I would recommend doing that too. Corrosion from moisture inside the cap will give Driveability problems like that too. I've seen some coils go bad on your style vehicle too, but they are usually working or dead and not often give a problem like that, but it's worth looking at. Any external arcing around the coil bracket would deem a replacement. Other than that, check codes if there are any, and go from there.

Question:
Will a 4L60E transmission from a 1996 2 wheel drive S-10 fit in a 1996 4 wheel drive S10.

Answer:
No. The output shafts are different lengths. Disassembly would be needed to swap the output shaft.


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