Next day had a code come up which was a glow plug. Im doubting it had anything to do with moving the amp ground to the frame. I did another ground resistance test this time with the truck running. And got strange results, with truck running cab ground resistance goes to 0.0 ohms, I checked the frame and it was 380 ohms. So my question: is the ...Knock sensor nightmare. Started after deep cleaning my engine compartment as I do after every oil change nothing different, check engine light came on I scanned found 0327 and 0332. Replaced both sensors lasted 50 miles back on. Checked all wiring found nothing wrong replaced sensors again good for 40 miles.It can also result in a knocking or detonating engine in the worst case, but most often you will notice signs like loss of engine power and high fuel consumption. Below we have a more detailed list of the signs of a bad or failing knock sensor to look for: 1. Check Engine Light. Just because you have a check engine light for your knock sensor ...Hopefully you all can help me out. First -. 2003 GMC 2500hd. 6.0 - 170k. Fairly Recent Fuel Pump, Spark Plugs, Oil Change, Cleaned TB and MAF sensor. I just pulled exhaust manifolds and replaced the gaskets. I now have a bad misfire. Only at an idle/low rpms. No CEL, but i did get a p0300 from the computer.Aug 9, 2021 · Regulated Voltage Control (RVC) is GMs' platform for computer controlled charging systems. This system is designed to raise and lower the alternator's voltage set point based on vehicle electrical needs. This maximizes charging system efficiency by reducing voltage output when higher voltages are not required.1. Harsh or Improper Shifting. The first symptom of a bad transmission speed sensor is harsh or improper shifting. Without a valid speed signal from these sensors, the PCM will not be able to correctly control the shifting of gears within the transmission. This may cause the transmission to shift roughly or more quickly than normal.115 posts · Joined 2010. #4 · May 17, 2011. I would pull the cover off around the steering column and shifter follow the wires up to the ignition switch. There is a black plastic cover over the connections. Pop the cover and look at the terminals. I seen a bunch of them melted just enough to make it act weird.1. What the ECM Does. 2. Bad ECM Symptoms: Chevy Silverado. 2.1 Failed Self Diagnostic Cycle. 2.2 Running Rough. 2.3 Poor Performance. 2.4 Won’t Start. …Measure the voltage drop across a connection while trying to start the car: more than .25 volts across a connection indicates a problem. The voltage drop tests need to be done while cranking the engine. It's the current flowing through a connection or wire that causes the voltage drop.See: 19 Best Online Auto Parts Stores. To replace a camshaft position sensor, you can expect to pay anywhere from $95 to $200. Parts alone will run about $25 to $100. Labor costs will be in the range of $70 to $100 for professional replacement. Expect to pay more if you have a luxury vehicle or are having your local car dealership perform the ...1. Clicking sound from the relay. One of the first symptoms of a problem with the fog light relay is an audible clicking noise from the relay. Many relays will produce a quiet audible click when they are switched on, however, an excessively loud click may be an indicator that the relay may be having internal issues. 2.When the switch does fail, usually a few symptoms will be produced that can alert the driver that a problem has occurred and should be serviced. 1. Reverse lights function intermittently. Intermittent functionality of the reverse lights is a symptom that the backup light switch may be having a problem. If the contacts in the switch are worn or ...03 silverado ext. Can. 5.3 vortec. My fuel pump isn't priming when I turn the key. I checked the relay and fuses. All checked out. But when I use a wire and jump it in place of the relay I can here it prime and it pressurizes all the way up to the fuel rails. I initially thought it was a grounding issue, but I read on a different forum that the ...Jan 6, 2021 · Make sure the studs and cable ends are clean and tight.. Peel a little insulation back near the ends of the cables and make sure they're not corroding from within. This is common and will give you the symptoms you're experiencing. I did try the jumper ground test and still the same symptoms.I already figured it out, this was a loose PCM ground wire (on the negative battery terminal wire). Took it off, cleaned it, no problems since.How the battery sensor works: it measures the current to and from the battery. The sensor may also monitor the voltage, state of charge and state of health of the battery (aging). In some cars, it even measures the temperature of the battery. The vehicle computer (BCM or PCM) uses these inputs to precisely adjust charging system voltage, idle ...May 18, 2023 · 1) Flickering lights. If the strap is loose, it can affect the performance of the headlights. It results in uneven electrical surges that could cause the lights to flicker. Left as is, it may eventually cause permanent damage to the light mechanisms. The lights are subjected to alternating surges and drops in power.1. No cold air from the AC system. One of the first symptoms of a potential problem with the evaporator temperature switch is no cold air from the AC system. If the evaporator temperature switch fails or has any issues that causes it to send an incorrect signal to the AC system, it can affect the system's ability to produce cold air. 2.The most common problem that causes the fuel gauge to read incorrectly is a bad fuel sending unit. The fuel sending unit is used to measure the amount of fuel in the fuel tank and communicate the fuel level to the fuel gauge on the vehicle dashboard. This ensures that the driver is aware of the fuel level at all times, as well as warn when the vehicle is low on fuel, and when to visit a gas ...The Silverado fuel tank pressure sensor or the one in any vehicle for that matter will inform the driver of the leak. It does this by illuminating the check engine light. The fuel tank pressure sensor can do so as it is connected to the vehicle's ECU. The check engine light is designed to be triggered by several important issues, but an OBD ...Indices Commodities Currencies StocksP0300 - Random Multiple cylinder misfire detected and... Been struggling for a few weeks with a P0300 on my 2005 GMC Sierra 1500 5.3 Z71 4x4 SLE quad cab 175k miles. It spent most of it's life in New York, so, yeah, fairly rusty underneath. This recent issue actually started with a P0307 (misfire on cylinder 7). So I cleared the code, swapped...Being proactive about replacing the kickdown cable before it breaks and causes extensive damage to other transmission components is important. Listed below are a few of the warning signs that a problem with the kickdown cable exists. 1. The transmission shifts hard.The BCM is responsible for managing various electronic systems like the keyless entry and passive anti-theft (chipped key), the ignition switch, and the security system. Again, a bad BCM can cause a car not to start in some cases. If the BCM fails to communicate with these systems or sends incorrect signals, it can prevent the car from starting.Main thing is you got to test evreything and leave the ECM as the last option. Some auto parts stores have a free scan service and could tell you what the problem might be..... :wink: 1989 GMC Suburban V1500 1/2 ton 4 x 4 350 c.i. f.i. 4 spd auto 187,000 mi and counting..... Like. S. slimyguts Discussion starter.Indices Commodities Currencies StocksStep 1 – Check fuses and wiring. If any accessories have been added like a remote start or aftermarket sound equipment, the wiring may have been damaged or compromised. Sometimes, you have to remove them. Gauges that are not working could mean a faulty ignition switch. This has been an issue on this truck series.#1 – Flickering Lights. If your ground strap is damaged or worn out, the electrical circuit will come across resistance while trying to deliver power to the …2004 silverado 5.3 random misfire p0300 code. Need help ,changed plugs and wires, intake gasket vacumn lines , pulled compression on all cylinders ( 125 to 138) random miss on cylinder 6 at idle than runs fine above 2000 rpm. You could have a ignition coil that is faulty. Try moving that number 6 coil to the number 2 coil position to see if the ...2004 silverado 5.3 random misfire p0300 code. Need help ,changed plugs and wires, intake gasket vacumn lines , pulled compression on all cylinders ( 125 to 138) random miss on cylinder 6 at idle than runs fine above 2000 rpm. You could have a ignition coil that is faulty. Try moving that number 6 coil to the number 2 coil position to see if the ...When it comes to diagnosing issues with your idler pulley, paying attention to noise and belt inspection is vital. One key symptom to watch out for is a squealing sound coming from the engine belt. This noise diagnosis is often an indicator of a failing idler pulley. Moreover, during a belt inspection, look for visual signs such as a worn-out ...718 posts · Joined 2019. #4 · Mar 6, 2022. The majority of the electronics are grounded to the cab/body. Each of those grounds can be poor OR the cab grounding to the frame is poor. The test to do is from the battery (-) to the cab/body. Larry - Cleveland. 2009, 2500HD, 6.0 L, 4x4, Ext Cab, Aluminium FlatBed. Like.Look under the driver's floorboard area. You'll see a frame extension with ground wires bolted to it. Unbolt that ground and clean it REALLY well, down to bare metal, and clean all the wire contacts and put dielectric grease on everything and bolt it back together. '13 SLE 4x4 ExtCab 5.3 6sp 3.42 G80 Z82 Z60 Fire Red. Bought new. 25,750 …1. DASH LIGHTS. The dashboard warning lights come on when you try to turn on your car, but the engine does not crank or spin over. This is a classic sign of a bad starter. 2. CLICKING. If you experience the dreaded "clicking" noise when you try to turn the key, this is a good sign of starter failure.Step 02: Locate the TPS on the throttle body of the engine. It is usually a black or gray plastic sensor with an electrical connector on top and is attached to the throttle body with two or three screws. Step 03: Remove the electrical connector from the TPS by pushing down the locking tab and pulling the connector off.This is the steering column actuator. Noted below are a few of the warning signs and symptoms that may indicate that a problem with your steering column actuator exists. 1. Difficulty starting the car. When you turn the key on your ignition, it draws power from the battery and sends a signal to the starter to activate the process.One of the first and most common symptoms is simply no response from the starter when you turn the key - no noises or engine cranking at all. Sometimes, repeatedly trying the ignition can produce a result, but that's not guaranteed. It usually means there's a faulty connection in the solenoid. Another common symptom is a single clicking ...Symptoms Of A Bad ABS Control Module. The most common symptom of a bad ABS control module is an ABS warning light on your dashboard. You may also notice locking wheels while braking on slippery surfaces. Another less common sign is a stiff or unresponsive brake pedal. These are not all the signs, so here is a more detailed list …Here is a more detailed list of the signs of a bad or clogged fuel injector to be on the lookout for: 1. Check Engine Light. One of the most obvious symptoms is that the check engine light on your dashboard is blinking. If one of the fuel injectors is clogged or dirty and is not efficiently supplying fuel to the engine, an electrical signal is ...Jun 28, 2022 · The easiest method to check the alternator is by measuring the voltage at the battery terminals when the engine is running. Start your Silverado 1500. Connect the black cable of the multimeter to negative terminal of the battery, and the red cable to the positive terminal. The voltage should be between 13.5 and 14.8 volts with the engine running.Symptoms Of A Bad ABS Wheel Speed Sensor. The most common symptoms of a bad ABS sensor are an ABS warning light on the dashboard, pulsating brake pedal, loss of anti-lock brakes, or loss of traction control. You may also notice other warning lights on the dashboard, such as the check engine light or traction control light.So about two months ago my temp gauge quit working and my truck started throwing the low circuit coolant temp code. 1999 Chevy Silverado 3500 dually 454 gas burner. I went to Advance Auto (Carquest) and purchased a new coolant temp sensor and switch. I replaced both and gauge still would not work and I was still getting the code.Set the multimeter to 20 Volts setting. Connect the red lead to the positive terminal of the battery. Connect the black lead to the negative terminal of the battery. Get the reading and memorize it. (It should be around 12.5 volts) Switch the black lead from the battery to a grounding point.Pull the manifold off. The knock sensors are located underneath the black plugs connected to a wire harness. Pull the plugs out and unbolt both knock sensors using a 22mm deep well socket. Install the new sensors and torque them to exactly 15 ft-lbs. Apply some RTV to the rubber plugs to prevent water from entering.However, the longer you leave the problem unaddressed, the worse it will become. 2. Excessive Engine Vibrations. If your engine has a faulty crankshaft position sensor, then it isn't optimizing any performance. Even worse, it might be utilizing incorrect readings to determine fuel and ignition timing.2008 Chevrolet Silverado 5.3L The Problem: No Crank – No Start The Diagnostic Tools: The Mechanic’s Expertise in Digital Diagnostics SnapOn Scan Tool OBD2 (16) LED Digital DLC Break-Out Box DMM Features on the Scan Tool (Voltmeter, Ammeter) “Scope-On-A-Rope” Light Probe Red/Black Wired “Pin Probes”1. Strong fuel odor, engine misfires, and decreasing power. One of the first symptoms of an issue with the fuel return hose is an excessive fuel smell. If there is any sort of issue with the fuel hose, either a leak, or some sort of kink that blocks the flow, it may cause the vehicle to produce an excessively strong fuel odor from the engine.Jun 21, 2016 · I already figured it out, this was a loose PCM ground wire (on the negative battery terminal wire). Took it off, cleaned it, no problems since.The type of transmission you have varies depending on your Silverado's trim. The common transmissions in recent Silverado 1500 models are six-speed, eight-speed, and 10-speed automatic transmissions. Modern transmissions consist of dozens of complex parts to create the hydraulic pressure necessary to change gears.The most common signs of bad spark plugs in Chevy Silverado 1500 are poor acceleration or hesitation, rough idle, engine misfires, poor fuel economy, check engine light illuminates, engine knocking noise, and sometimes hard starting. In worst case scenario, if the spark plugs are in really bad condition, the engine will not start.A failing or bad battery, as well as loose connections can wreak havoc with the truck's electrical system. Possible symptoms include power locks locking and unlocking on their own, dashboard lights flickering, as well as the radio turning on and off. Some trucks may have a hard start, or will refuse to start again after being parked and shut ...The importance of a ground strap in a car. Besides being strictly necessary to close your car battery’s circuit, a ground strap ensures your battery will operate at a consistent and useful voltage. It also reduces the likelihood of a short circuit. A short circuit occurs when current flows on an unintended path, leading to unusually high ...Oct 16, 2017 · 1, sounds like you are on the right track to suspect a bad ground for the rear lighting. Follow your wiring harness from the rear lights as it goes forward. 2, check to see how clean the radiator is(if you have A/C, the condenser coil is the 1st to get dirty), bugs, dirt, etc.....Symptoms Of A Bad Turn Signal Switch It's rare for the turn signal switch to fail but when it does, the most obvious symptom is that either the right of left turn signal won't work. Since all of the Front Right, Rear Right, Front Left, and Rear Left circuits (inside the turn signal switch itself) are all separate, you might see one or two of ...As mentioned above, the ECM controls the engine timing, and air/fuel ratio. So, when it goes bad, it can knock your Silverado's air fuel ratio off. This could lead to poor fuel economy, the previously mentioned rough running engine, backfiring, a flashing check engine light, and an engine that has no giddy-up and go. 4.When the valve cover or gasket is bad, oil seeps into the cylinders below, leaving behind oily plugs. If there's too much oil on the plugs, the contact between the spark plug and the ignition coil can get weak, resulting in engine misfires which we will talk about now. 5. Misfiring Engine.Common Trouble Signs. One of the keys to diagnosing a problem with the body control module versus an issue with an individual component is sudden, unusual behavior. Examples include flashing dash lights, a stereo system switching from AM to CD in the middle of a broadcast, the horn honking when you put down a specific window or hazard lights ...Check engine light turns on. Usually, an illuminated check engine light is the first and only sign of a bad catalytic converter. When the light pops on, your car's engine control module (ECM) will also store a diagnostic trouble code (often a P0420 code) in its memory. Poor engine performance.A_T_Ver Discussion starter. 124 posts · Joined 2008. #1 · Sep 3, 2010. What are the symptoms of a bad ecm? One day my truck would run great up to about 45mph the crap out on me, shake and rattle then die. Codes are p0642 and p0802. Yesterday it was hard to start and runs horrible then dies. I checked for harness rub, found nothing, i'm ...32 posts · Joined 2011. #2 · Jun 29, 2011. Don't know if this might help, but I did find a thread that mentioned (splice pack) sp423 -- a bunch of grounds packed together on the rear crossmember just behind the fuel tank (and damned difficult to get to). Apparently, corrosion of this pack can even cause engine misfire codes.1. on the core support just by the passenger headlight. 2. some spot as the passenger but near the horn on driver side. 3. one the frame near the battery tray. 4. firewall: the piece that is black. 5. at the rear near the tailgate under the bed on driver side. thats all i know of/messed with.The engine control module (ECM) is the computer that manages every system on the vehicle related to emissions. When something goes wrong, the ECM will hopefully record a diagnostic trouble code and turn on the check engine light. But the ECM (all by itself) can do nothing. It first must be programmed.Jun 19, 2015 · Step 1 – Check for bad axle actuator. If your truck is driving perfectly fine but switching into 4WD doesn't engage the front wheels, you might have a bad axle actuator. Replacing the actuator is pretty easy and inexpensive. You can find a new actuator online at prices ranging between $65 to $100. To replace the actuator:I had problems with my left side turn signal on my 2004 silverado, the cause was a bad flasher relay.Showing the problem and the fix in that videohttps://www...Engine to frame, body to frame. I like to put a body to frame ground at both the front and rear of the vehicle. I had a buddy who had an earl schieb $99 paint job. Afterwards the speedo cable kept failing. The added paint had reduced the engine/chassis ground. The engine was grounding through the speedo cable.Here is a more detailed list of the signs of a bad or clogged fuel injector to be on the lookout for: 1. Check Engine Light. One of the most obvious symptoms is that the check engine light on your dashboard is blinking. If one of the fuel injectors is clogged or dirty and is not efficiently supplying fuel to the engine, an electrical signal is ...6. Misfires. Low fuel pressure in the fuel system will cause an off-balance air/fuel mixture and that, in turn, causes weak combustion. This can be felt as misfires on acceleration or even at idle. Fortunately, the fuel system in a car requires only minor tweaks.2008 Chevrolet Silverado 5.3L The Problem: No Crank – No Start The Diagnostic Tools: The Mechanic’s Expertise in Digital Diagnostics SnapOn Scan Tool OBD2 (16) LED Digital DLC Break-Out Box DMM Features on the Scan Tool (Voltmeter, Ammeter) “Scope-On-A-Rope” Light Probe Red/Black Wired “Pin Probes”However, the following is an account of the average expenditure associated with body control module replacement. The average cost of body control module replacement ranges from $300-$600. The biggest variable in this price is the actual cost of the failed module itself. At the current time, shipping costs associated with locating and procuring ...66 posts · Joined 2011. #1 · Apr 10, 2012. Hey guys have an 03 silverado and just started having a problem with my drivers side door. I have no power to my window switches, mirror switch, locks, lights, and doesn't ding when door is open with key in ignition. Passenger side works find though. Checked all fuses.Activate all 8 fuel injectors to start spraying fuel into the cylinders. Maintain the fuel pump activated after its initial start. With fuel and spark now present, the engine now starts. The most important thing to know, is that if the CKP sensor goes bad, your 4.8L, 5.3L, 6.0L GM vehicle vehicle will 'crank but not start'.1. Vehicle does not drive like it used to. If your vehicle idles roughly, stalls frequently, has a drop in engine power, stumbles frequently, has reduced gas mileage, or accelerates slowly, these are all signs your camshaft position sensor could be failing. If you have any of these symptoms, it could mean the camshaft position sensor needs to ...One of the first and most common symptoms is simply no response from the starter when you turn the key – no noises or engine cranking at all. Sometimes, repeatedly trying the ignition can produce a result, but that’s not guaranteed. It usually means there’s a faulty connection in the solenoid. Another common symptom is a single clicking ...First YouTube video ever ! So bare with me... I find the location of the ground wires on my 2500 had 05 Silverado been having the reduced engine power proble...Chevy Silverado ignition switch replacement cost is between $130 and $160, depending on your model year. The cost includes both labor and parts. The Silverado ignition switch itself is relatively affordable and you can get one for $60-80 it is the labor that's the most expensive part of the process. If you're up to doing it yourself, you ...66 posts · Joined 2011. #1 · Apr 10, 2012. Hey guys have an 03 silverado and just started having a problem with my drivers side door. I have no power to my window switches, mirror switch, locks, lights, and doesn't ding when door is open with key in ignition. Passenger side works find though. Checked all fuses.Signs of a Bad ECM. 1. Check Engine Light Turns On. An illuminated Check Engine Light is one possible symptom of a bad ECM. The Check Engine Light usually illuminates when the computer detects a problem with any of its sensors or circuits. There are cases, however, where the ECM illuminates a Check Engine Light mistakenly, or …1 post · Joined 2021. #1 · Jul 22, 2021. I have a 2016 Chevy Silverado with a NG 2.5 HMI Module. Upon starting my car, my radio will turn on as normal. After 20 seconds, the power will flash to my radio, infotainment, and usbs. This causes the infotainment to restart. It continuously happens like this for 5-10 minutes before completely ...Engine cranks but won't start. Fuel pressure is good, 58 psi and holds around 50 psi after key is turned off [/*] It has spark as evidenced by putting an old spark plug into a spark plug wire and grounding the plug [/*] After spraying a small amount of starting fluid into the air intake tube, the engine starts for just a moment, then dies [/*]2008 Chevrolet Silverado 5.3L The Problem: No Crank – No Start The Diagnostic Tools: The Mechanic’s Expertise in Digital Diagnostics SnapOn Scan Tool OBD2 (16) LED Digital DLC Break-Out Box DMM Features on the Scan Tool (Voltmeter, Ammeter) “Scope-On-A-Rope” Light Probe Red/Black Wired “Pin Probes”The symptoms listed below can all be caused by inadequate fuel supply to the engine: Rough starts or rough idle. Engine sputtering during acceleration. Loss of power output. Stumbling at higher RPMs. Unable to maintain highway speeds. Louder than normal whining or humming coming from the fuel tank.How to fix a bad oil pump. If you suspect a bad oil pump or loss of oil pressure, stop driving your car immediately. Have it towed to a repair facility and assessed by a professional mechanic. It may be possible to get away with just replacing the pump. But, in many cases, when the pump fails, it starves the engine of oil pressure and causes ...This pressure comes in the form of power steering fluid, which gets pumped from the reservoir into the steering gear as needed. There are up to 5 symptoms of a bad or failing power steering pump, so if you notice the following, have the pump inspected by a professional mechanic as soon as possible: 1. Whining Noise While Turning the Wheel.There are a few warning signs that will signal that you may have a bad or failing wiper module. Listed below are some of the symptoms that you should consider. 1. Wiper blades won't turn on or off. The wiper module's primary job is to send a signal to the wiper motor which powers the wiper blades. Before it can control the speed or duration of .... 1. Check Engine Light. The most obvious sign that 2003 Silverado 1500 For the last couple of months, Updated on 12/03/18. There is a solenoid in your GM converter that causes the the torque convertor clutch (TCC) to engage and disengage. When the TCC solenoid receives a signal from the engine control module (ECM), it opens a passage in the valve body and hydraulic fluid applies the TCC. When the ECM signal stops, the solenoid closes the valve ...1. Car stalls while driving. One of the first symptoms of an issue with the ignition switch is a vehicle that suddenly stalls while the engine is operating. If the ignition switch fails while the engine is operating it may cut off power to the ignition and fuel systems, which will cause the engine to stall. 2003 Silverado 1500 For the last couple of mo 19 posts · Joined 2012. #1 · Dec 22, 2012. i have an active code P0340 for the cam sensor. i replaced the sensor and i still dont have any rpm. i checked the signal circuit at the ecm and its not showing any pulse so i replaced the cam connector and ran a new wire to the ecm for the cam signal. still no rpm. is my new cam sensor bad.A bad ground can cause all sorts of weird issues. You can also unhook your battery for awhile and then see if some of the codes go away. 2015 SILVERADO LTZ 6.2L -4x4 -8 Speed -HDX Steps. 1964 C-10 383 Stroker -12 Bolt Posi -Custom Holley 650 -Hurst Shifter -Stan's Headers -2 1/2" duals w/H pipe-40 series Flowmasters. Summary. The four signs of a bad starter so...
Continue Reading