1995-1997 Yukon Ignition Starter Alarm Switch - Answered Questions & Fixed issues

Yes it can. There is a thick WHITE colored wire, that needs to power up as a true ignition wire or it will not activate the electrical portion of your transmission. This is a common known problem especially with dealing with remote starters in these vehicles.

replace crankshaft or camshaft sensor

try the fuel pump relay

you can sometimes 'unremember' your key. sometimes if you have too many keys on your key chain the computer can see your key, you should try the key alone first, if this still doen't work, you can try and re program your key, there should be instructions way better than i can give here in the manual. other wise you might have to take it to a dealer.

Check for "Ignition crank sensors" GMC's are well known for water on these sensors and eating them up causing "no start" Hope this helps

i have a 1995 gmc yukon and when the motor was cold she start with no problem and run greatr when the motor get to temp and you shut it off it would start i tryed clean contact on the starter and that didntr work i tryed the battry cables that didnt work i was told tht it may be the oil sending unit i changed that and the problem went a way not say that your problem but look at the oil gauge see what it is doing when starting and then take it from there good luck hope this helps .....................

Plugged fuel filter, or faulty fuel pressure regulator. Last possibility would be bad pump but since it does run, it I would first change fuel filter, then regulator if necessary

The first thing you should do is to locate the oil pressure switch/sending unit.


This switch serves two functions.

1) provide oil pressure reading

2) disable the fuel pump relay in event of oil pressure loss.

===

When this switch is failing to provide the correct pressure to the ECU. The wiring harness can overheat and eventually create a short.

ECM1 fuse blow is because the harness is grounding/shorting.

===

DO NOT drive the truck until you change the oil pressure switch.

After you change the switch,you should spend sometime to inspect the wiring between the fuel pump relay,ECU and fuel pump.


Please post up day on the comment window/page.

I will follow up on it later.


Good luck.

I know this problem. First, if you have not replaced the starter and solonoid within the last 150,000 miles then now is the time. That will solve your problem. But if your like me and your a cheapskate then this is what you do. Go to autoparts store and get a set of brushes for your starter motor, $5.00. Pull the starter and disassembly the motor, replace the brushes, etc. Disassemble the solonoid and inspect the points of contact where electrical continuity is essential. Remember 12 volt starter power is always hot at the starter. When you turn the key your just powering the solonoid coil which pulls the starter gear to the flywheel. This process also completes the circuit to the starter motor. When your car is hot, the expansion due to change in temperature will cause loss in continuity within the solonoid if parts are significant worn. Hope this helps

Try turning the stearing wheel and turn the key. This usually happens when your vehicle is sitting or parked in awkward position.

if you feel you have the technical ability and tools like standard socket set wire crimpers and crimp terminal you may be able to do it ... the unit is most likely installed under the dashboard by the steering column ... where the wires are .... you'll have to reconnect the wire(s) that were interrupted and disconnect two more and tape up any bare wires it all depends how or what materials the installer used. On the Yukon there will be a wire from the Immobilizer to the Thick Red wire of the Yukon ... and a wire connected to the thick pink wire of the Yukon .... and there will be 2 wires from the Immobilizer to an either thick yellow or thick purple wire that was cut ... remove those two wires from the immobilizer and reattach that wire with a Yellow or blue barrel crimp whichever fits best

you can use a very small socket on those... I have done it several times, I believe it needs to be a 4.5 -6mm socket... I know this works. Just take a handful of your small sockets and try them one by one to see which one fits and grabs it.

i think i might know how to solve the issue... Check out this site he sells a module to bypass the security and that should help with it going off randomly. I know i used it in mine and i haven't had any issues since

internal slippage computer picks up tranny is slipping in 4th and downshifts have to shut it of or erase codes but it will come back drain fluid add 1 bottle lucas tranny fix and fill with fluid drive for a 100 miles or so then drain fluid change filter and fluid and it may last otherwise buy a new tranny or rebuild that one sounds like its on its way out

Depending on the year model and vehicle type, GM has a recall on the fuel gauges sending unit. you might check with them, other wise, replace the duel gauge sending unit.

diesel engines can be a real pain if you run them out of diesel and cost you a bit to get them started again, it's due to the air that gets into the injector valves. The seller should pay for the price of this or give you a refund if he is not willing to cover this cost, it's really not fair he have you come and pick it up saying it's run out of fuel, whats to say he never ran out days before which is why he's selling it! It's a job you need to get a garage to do and not as easy as just putting more diesel in. This used to be the case with older diesel engines anyway i'm unsure about the more modern ones. Good Luck...

Depending on your particular vehicle, some vehicles have a vacuum routing diagram under the hood.

once you take off the brake caliper you have to take off the big nut in the center of the rotor it might come off by hand or you might have to tap it off

the cheep way is junk yard cut the old one off and replace with

place the key in the ignition and turn on.leave on for ten minutes.once ten minutes is up security light will either flash or go out.then turn off and then on again.repeat 3 times.this is a 30 minute relearn.remember just turn the key to run not start.good luck