Top 20 2003 Chevrolet Suburban 1500 Questions & Answers

Do you know how to do scan tool diagnostic's ? Checking DTC'S - diagnostic trouble codes , viewing input data to the computers on the vehicle . The fuel sending unit is located inside the fuel tank ,it is a input to the PCM - engine computer . The PCM use's this fuel level info . to be able to conduct testing procedures for the evaporative emission system. The Evaporative Emission Control System (EVAP) is used to prevent gasoline vapors from escaping into the atmosphere from the fuel tank and fuel system. The EVAP system usually requires no maintenance, but faults can turn on the Check Engine light and prevent a vehicle from passing an OBD II plug-in emissions test.. Shorted sensors can cause all kind of problems .including bring down the five volt reference circuit inside the PCM . Also checking for DTC'S in the 4X4 control module should have been done before replacing parts . Your best bet ,take it to a qualified repair shop. Do you know which transfercase your vehicle has ? The NVG 246 EAU transfer case features a 4 button shift control switch located on the instrument panel. The BW 4482 transfer case features a 3-button shift control switch located on the instrument panel. Just replacing parts is not the way to a fix . Both systems can set a number of DTC'S DTC B0790 DTC B2725 DTC C0306 DTC C0327 DTC C0329 DTC C0359 DTC C0550 The NVG 246 EAU transfer case DTC B0790 DTC B2725 DTC C0300 DTC C0305 DTC C0306 DTC C0321 DTC C0327 DTC C0359 DTC C0374 DTC C0379 DTC C0550 Do yourself a favor ,have a qualified repair shop diagnose the problem . An you can't just replace the 4X4 control module an expect it to work .It needs to be programmed . Transfer Case Shift Control Module Reprogramming Remote Programming Feature Connect the scan tool to the vehicle. Power-up the scan tool and select the Service Programming feature. Select the appropriate vehicle. Press the Request Info button on the scan tool. Disconnect the scan tool from the vehicle and connect the scan tool to the computer station. Follow the menu select items for reprogramming and provide information as to what type of device you are programming and whether you are reprogramming or replacing the electronic control unit (ECU). Select "vehicle" from the selection menu. Select the module you wish to Program. Select "Normal" for Programming Type. Select the applicable software calibrations. Transfer data file to the scan tool. Reconnect the scan tool to the vehicle. Turn ON the ignition, with the engine OFF. Select the Service Programming feature on the scan tool. Press the Program button on the scan tool.

I recently tried the DIY service and repair manuals from a website and it actually helped me repair transmission problem in my jcb 3cx site-master. It would'nt move forward or reverse, engine was good both solenoids for forward and reverse worked, but still couldn't diagnose the problem. I don't have much technical knowledge but I just followed it step-wise, and now it works perfect! covers wiring, codes, diagrams, torque specs, PCV, everything got it from www.reliable-store.com

bbbind.com has wiring diagram for your transfer case. I looked at it, but, couldn't get everything in one picture.

Sounds like it's the heater core

There should be a fuse block under the hood. Go double-check.

First things first...your vehicle will register fault codes for assisting in the trouble shooting of some system failures (usually emissions related faults.) This system is called OBDII. Auto zone used to provide free reading of your vehicles on board computers in the hopes that you will purchase the required repair parts there. When you retrieve the codes either by the assistance of a parts store or by purchasing a ODBII Code reader you will have a place to start your investigation. PS: Your owner manual may also help to identify the meaning of tell tale lamps on your dash cluster. Follow the link below for another possible fix for your flashing light: button flashes when Auto is selected 38 degrees tonight with fogged up...

The motor has sealed bearings. You need a motor but probably not the squirrel cage. The switch repair was to get the fan working and warranty wouldn't cover the fan.

Ticking noises from an engine, even an SBC, are never normal, Richard. You may be hearing lifter noise (one bad lifter) or excessive valve lash, or both... or you MAY be hearing a small exhaust leak from one manifold. If the pistons you put in aren't a really good match for the cylinders, you may be hearing "skirt slap", which will devolve into a really bad situation later down the line when the piston skirts break off. You may possibly be hearing bearing rap from either rod bearings or main bearings, if they were a little too loose, or timing chain slap if the tensioner isn't working right, or looseness in the distributor drive, or even spark snap between a plug cable and the block or head.

Have you looked at fuel pump and fuel filter? Turn key to first position and have someone near fuel tank. They should hear the pump cycle.

Have you never had a problem like that, since you started driving? Start testing things-- to find a problem Is the battery dead,old,worn out? Have it tested Test the starter & solenoid Examine & test the battery cables & many other items effecting the starting system Won't Crank (turn over)? or Won't Start? Won't Start check for fuel pressure,spark,injector pulse & so on

two screws on arm rest

Vacuum issue, either a leak or a problem with the vacuum solenoid.

I think it's on top of the instrument panel. If you need further help, I’m available over the phone at https://www.6ya.com/expert/michael_2496c4f07ad24453

P0140 - 02 Sensor Circuit No Activity Detected (Bank 1 Sensor 2) The causes for a P0140 code are few and unless the wire/s has been damaged, replacing the sensor is usually the smartest thing to do.

More that likely it needs a tune up. I replaced the spark plugs, spark plug wires and fuel filter on mine and it ran like new. The fuel filter is found under the car mounted to the frame near the drivers door, but you need a special tool to remove it.

you have to unscrew door pull and all on inside panel , take off panel , relocate track and reinstall .

assuming the starter is installed properly, it could be a variety of things. if the battery is not strong enough to fully start the truck. could check the condition of spark plugs and spark plug wiring.

ok was the first one doing the same thing and has the same noise? if so is there oil in the transfer case? if it has oil then you may have a bad solenoid and check you wire harness to see if there are any defects some time rat take food under there and nibble the wire while eating i will try find out some things abou

If you can see under the seat, maybe move it forwards and raise it up if it is a power sear, look for the wires coming out from the rear of the seat bottom to a connection under the seat.

Check the fuel pump relay located in the fuse panel under the hood. Switch it temporarily with the horn relay or the a/c relay. Check for power at the pump. If it starts it's fixed and u now have a horn inop or ur a/c is inop. Change relay is the fix. If no power to relay check wires for corrosion and check continuity. If wires are good and you end up with power at the tank , then the problem might be that u need a fuel pump rockauto.com has great prices . Check em out! Have someone set ebrake and turn the key holding it in the on position. Bang on the tank with a rubber mallet. If it starts u kno it needs a fuel pump.