The security, antitheft or lock picture/icon is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM (Theft Deterrent Module). These 3 parts are in CONSTANT communication. If the key is in the ignition, then these parts are sending signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, the car misinterprets this as an attempt at theft and goes into antitheft mode. The car thinks its being stolen or hotwired because it is not getting that signal from YOUR specific key. This is why the security light turns on and shuts down your vehicle. This link explains it pretty well.
http://www.diy-gm-security.com/
Perform the re-learning procedure
Turn ON the ignition, with the engine OFF.
Attempt to start the engine, then release the key to ON (vehicle will not start).
Observe the SECURITY light, after approximately 10 minutes the light will turn OFF.
Turn OFF the ignition, and wait 10 seconds.
Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes ( the vehicle
is now ready to relearn the Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK).
Important: The vehicle relearns Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
Start the engine (the vehicle has now learned the Sensor Data Code and/or password).
The most conclusive way to test your starter is to remove it from the vehicle and simply test functionality with a 12V battery. Typically there are three points on the starter case were wires are attached you can use a screwdriver with the starter on the vehicle to jump the points and listen for the starter to activate, however this is inclusive because you cannot see what is happening. With the starter off the vehicle you can use your cars battery to test the starter(you will need test leads or jumper cables and a screwdriver). Attach the lead from the negative battery post to anywhere on the starters case to ground the circuit. Now attach the positive lead to large positive wiring point on the starter, now it is supplied with power. When you turn you ignition a second 12V signal is ent to the starter to activate it, to simulate this TOUCH an additional posative lead to the activtion post on the starter, if you do not have leads use a screwdriver to bridge the gap. Your starter solenoid should come out and the starter should spin forcefully, if it does not function or spins weakly replace it. For one on one help, videos, and anything else you could need to solve your problem you can contact me through my webpage www.autoabsolute.ca
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Fault code P0174 in Chevrolet SUV/Trucks indicates the engines fuel/air mixture is too lean. The most probable cause for this is usually a defective or malfunctioning engine exhaust oxygen sensor.
Runs out of fuel or you have ignition system problem .You need to test to see which . On GM vehicles if there is a problem with the anti-theft system it can act like that , do you have a security light lit on the instrument cluster ? The best thing would be to have it hooked up to a factory scan tool .
A scanner is the best bet. Test it, read the codes. There isn't a light for it. Could be a bad connection at the cluster also. If it is intermittent, suspect the plug/s. Fixed many for this.
What about on defrost, do you get the proper temperature in the front, if you do it is probably a blend door issue controlled by the blend switch or knob.
if it is an all wheel drive then it may have a limited slip action in the transfer case differential ( most have a lock up switch for that action)
refer to your workshop manual or consult your service dealer center
Crankshaft position sensor , possibly !
Crankshaft Position (CKP) Sensor
The crankshaft position (CKP) sensor is a three wire sensor based on the magneto resistive principle. A magneto resistive sensor uses two magnetic pickups between a permanent magnet. As an element such as a reluctor wheel passes the magnets the resulting change in the magnetic field is used by the sensor electronics to produce a digital output pulse. The PCM supplies a 12-volt, low reference, and signal circuit to the CKP sensor. The sensor returns a digital ON/OFF pulse 24 times per crankshaft revolution.
There are a lot of videos on youtube on testing crankshaft position sensors an Cam sensors !
There
Could be. There is a fuse for the gauges. Pull it and look at it. Corrosion. Next I would pull the IP and remove the plug and put it back in, Again corrosion. Still no gauges, Check for power and ground , then replace it.
Gap the at .060 to get it right. The dealer is wrong about your specific engine gap. These plugs fits many other vehicles with the preset gap but yours is different
Speed sensor for the ABS system or for the speedometer?
If the speedometer and it is four wheel drive than the speed sensor will be in the rear housing of the transfer case. I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa
