Top 20 1999 Chevrolet Suburban Questions & Answers

Now it won't start ? WHY ? how do we know, we don't have the vehicle here in front of us. Won't start how ? NO-crank no start or crank no start . you need to be more specific ! Have you test anything ,do you know how to test anything ? No Crank, No Start Diagnosis - EricTheCarGuy - YouTube

You need to determine if it is a fuel or electrical problem. Will it keep running if you spray starting fluid into the throttle body? Check to see if the ignition system is failing by checking spark at the plugs. Possible ignition module problem. Make sure the harness to the injectors it tight.

Question edited for clarity, full year make model. Question moved to category. Check out all the videos https://www.google.com/search?q=1999+chevrolet+suburban%2C+replace+transfer+case+fluid ..

loss of compression piston rings --valves --cam worn--lifter failing weak or damaged valve springs these would also cause misfire

very limited info generic answer check for trouble codes -- trans fluid level -smell and look at color --possible need flush and filter

Did you maybe bump the fader button so that all sound is faded to the front? That's pretty easy to do.

This could be many things, but I would start by checking coil, ignition relay, crank/cam sensor, idle air control valve, coolant temp sensor (the one that speaks to the ECU).

It sounds to me as though both of the wipers have slipped. The operation of the wipers sounds fine except they do not park in the correct location. To fix this, start the wipers and then turn them off to ensure they think they are in the parked location. At the base of each wiper there is a small cover that can be easily removed with a small screwdriver. Underneath each cover you will see a nut. Loosen the nut somewhat and reposition each windshield wiper to the proper park location. Once done, tighten the nuts securely but do not over tighten, then reinstall the caps. Cycle your wipers on and off a few times to ensure the wipers park correctly. I have owned a lot of vehicles and ALL of my GM vehicles have had this problem.

Possibly the throttle position sensor. Easiest way to test is connect a scanner and go to real time data mode. With the key on,press the accelerator slowly and watch the throttle position change on the scanner. If it doesn't register a change when you start opening the throttle, replace the sensor.

Because your vehicle is older, I'm thinking it might have something to do with a switch. There are several it could be. First, if a door switch is bad, or worn out, or out of adjustment, this might be the cause. I think I am right in saying the way the light turns on is to ground the circuit. When you open a door, the door switch has a spring inside to affect a ground situation, turning on the light. Check the door switches, I think you have 5. Could be a worn out dome-light assembly. I've had this happen. It can turn on all by itself if it is worn out. Finally, could be the headlight switch worn out. God bless your efforts.

have you had the gauge tested to do go out of range over time. it could just not read lower readings i would check this before anything else, rule out the gauge having a fault.41 lbs PSI hot and ~55 lbs cold based on the dash gauge should be around these figures plus or minus, could also check vacuum lines for the engine breather. if i remember these also adjust the pressure as well.

Did you ever think of having it diagnosed by a qualified repair shop ? Thier are aspects associated with this system you have no clue about. That's the first thing every one goes for , changing the switch . It flashes because codes are stored . DTC B0768 Service Indicator Circuit High DTC B2725 ATC Mode Switch Circuit Malfunction DTC C0300 Rear Speed Sensor Malfunction DTC C0305 Front Speed Sensor Malfunction DTC C0308 Motor A/B Circuit Low DTC C0309 Motor A/B Circuit High DTC C0310 Motor A/B Circuit Open DTC C0315 Motor Ground Circuit Open DTC C0323 T-Case Lock Circuit Low DTC C0324 T-Case Lock Circuit High DTC C0327 Encoder Circuit Malfunction DTC C0357 Park Switch Circuit High DTC C0362 4LO Discrete Output Circuit High DTC C0367 Front Axle Control Circuit High DTC C0374 General System Malfunction DTC C0376 Front/Rear Shaft Speed Mismatch DTC C0387 Unable to Perform Shift DTC C0550 ECU Malfunction DTC C0611 VIN Information Error You need a professional scan tool to check for these codes an too view data parameters . Transfer Case Shift Control Module The transfer case shift control module uses the VIN information for calculations that are required for the different calibrations used based on axle ratio, transmission, tire size, and engine. The system does not know which calibration to use without this information. The direct battery supply line (CKT 1640) provides the power to the module and motor circuitry. Transfer Case Encoder Motor The transfer case encoder motor consists of a permanent magnet (PM) DC motor and gear reduction assembly. It is located on the left hand side (drivers side) of the transfer case. When activated it turns the sector shaft of the transfer case (clockwise or counter clockwise) to shift the transfer case. The encoder motor is controlled with a pulse width modulated (PWM) circuit within the transfer case shift control module. This circuit consists of a driver on both the Motor A and Motor B circuits. The encoder motor is bi-directional to allow the motor to shift the transfer case from 2HI or 4HI to neutral and 4LO positions. Transfer Case Encoder Your best bet ,take it to a qualified repair shop .

Too much negative weight causes your tires to loose grip.

Not that simple to just disconnect it. Otherwise thieves would have no problem stealing vehicles with security systems. The black box communicates with the engine computer, and then the computer enables the vehicle to start and stay running. That isn't a bypass technique, it is a reset procedure. Apparently it has got to the point that the reset doesn't fix the problem. Now you may need a new black box-the theft deterrent module-or it may be a problem with the ignition switch. Sounds like the box, but not sure. Ask a pro near you. Just a heads up- that black box (TDM) can be very expensive. A company called newrockies has developed a module that bypasses the security system for good. this module signals the pcm that all is good, and no problem with the security. They sell this module for about $250. (A GM black box can be around $800, so you are better off with newrockies, and be done forever with security issues.) Google newrockies and you will find out more about it.

milky sump oil is coolant in the sump could be head gasket could be the aluminium housing behind the water pump has corroded and leaking water into the sump that will account for you thinking that you need anew radiator

Is this still broken?

if its a 5.7 change your distributor cap and rotor and problem will be solved guarantee it

Passlock on this vehicle shows the key does not have a pellet and no transponder. It's just a mechanical key. It is the tumbler that communicates with passlock sensor. The passlock sensor wiring is noted for problems. Can you check applicable trouble codes?

Theft system has activated. Turn key on and leave on until light goes out (usually around 10 minutes) turn off then back on. Wait until light goes out then try to start it.

Try books4cars.com or factoryrepairmanuals.com.