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Silverado 2500 HD

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Question
Knocking noise
Hi there. In most cases, when you hear a constant knocking sound upon engine start, it's due to a lack of lubrication or oil inside the engine (typically the cylinder heads and their components). Once the motor begins to warm...
Question
Truck goes into reduced power. I have to stop, remove the key from ignition, remove gas cap, and put the gas cap back on. Truck some times will do this 2 to 4 times.
Hi there. Check the gas cap seal and see if there is a crack on it or if there is a distortion on the seal. If there is, I recommend replacing the gas cap. The gas cap seal is designed...
Question
No matter what setting the AC is on it'll only blow out if the defrost vents . I have changed the fuses thinking they may have bee
Hello, thank you for writing in. The climate control utilizes something called "blend doors" to control where the air is being sent through the ducts. These blend doors are controlled by servomotors that open and shut them. Something has likely...
Question
How long will it take to remove and replace the engine and transmission.
Hi Chuck. That really depends on your tools, equipment and experience. Some professional mechanics with engine lifts and air tools can remove the accessories, motor and transmission mounts in less than two hours. The best advice I can offer is...
Question
Reduced power comes on message in truck have no gas petal and it sputters like bad plug 2004 Chevrolet Silverado 2500
Hello - the first task is to check for problem codes that are setting the Check Engine light on. The loss of power could be due to a failing throttle position sensor, or fuel pump. I recommend a loss of...
Question
think heater relay is gone checked today lost heat yesterday but dont know what it looks like the plug is melted also this small p
Hello, thank you for writing in. The main component related to the heating system that is located near the dash board is the heater core. If this relay or part of the circuitry that you have found damaged is part...
Question
4x4 won't engage and push button switch lights up intermittently.
Hi there. Check the electrical wiring to the transfer case shifter motor and see if there is a voltage present when pushing on the 4WD button. If there is a voltage present, then I recommend replacing the servo motor on...
Question
Truck isn't engaging into 4 Hi, but will go into 4 Low.
Hi there. Sounds like the shifter module motor or shifter rail is not working properly. Check the wiring on the shifter module motor on the transfer case and see if the wires are split or damaged. If the wires are...
Question
Stalling
Depending on the conditions when the stalling occurs, this may be related to the various loads put on the motor which may indicate a faulty MAP sensor. The Manifold Absolute Pressure (MAP) sensor senses engine load and generates a signal...
Question
dash lights dim and radio goses off when i hit the gas and battery wont hold a charge when the truck is on
Hello, thank you for writing in. It would seem for one reason or another that the charging system is having trouble keeping up with the vehicle. The alternator is the heart of the charging system and supplies all of the...
Question
New motor now electrical problems
If it's a "new" motor, and the bearings are possibly dry (they shouldn't be, but you never know), you can pre-lube the motor by using a Pre-Lube Engine Oiler Tank. After ensuring there is oil throughout the motor, verify that...
Question
Bubbles and pressure in the overflow tank
If the coolant level was low due to a leak, such leaks can be found during a leak diagnostic with simple pressure testing. If the cooling system doesn't maintain pressure, and no external leak is visible, coolant could be leaking...
Question
Idles but when driving it acts like its out of fuel.
Check all of the battery ground cables to the car on the battery, engine, and chassis. There is a bad ground somewhere that is causing the ECM to not work properly. This would cause the fuel pump to not work...
Question
Brakes are locking up
Hi there. The power steering and brake system are not related mechanically. However, it is possible that prior to working on the power steering system, the ABS module was deactivated or an electrical connection was removed; which can cause the...
Question
Motor swap advice
Hi there. As long as your transmission is a 4L60E, or a 4L80E, then the engines will bolts up to the same transmission. Most of the newer transmission have a replacement bell housing that can be swapped around with different...
Question
Shifts feel delayed often over revs
Hi there. P0700 is set when the PCM detects a malfunction in the transmission control system. This malfunction causes the vehicle to set a Check Engine Light and trigger a failsafe mode. Once the failsafe mode is set it will...
Question
fuel filter
Hello. We will be happy to assist you. There are are a few things that I recommend a technician inspect. Fuel should have been inside the filter once you removed it. A test must be done to see if the...
Question
if my transmission fluid was filled a quart over could this cause my reduced engine power light to come on?
Hi there. Usually the reduced power light is caused by an engine component failure, like the throttle body, TPS or bad O2 sensors. It is very possible that the additional transmission fluid has created a trouble code that might have...
Question
trans hot idle engine comes on when i start the truck
Hi there. Understanding what causes the transmission hot idle warning light is critical to diagnosing your problem. The Transmission Hot – Idle Engine message can be displayed when the transmission fluid is too hot, which prevents the transmission from cooling...
Question
2004 chevy silverado 2500hd dies when put in gear after the engine warms up
Hello, thank you for writing in. Unfortunately, there are a large number of components that can contribute to this issue. The first thing you will want to do, regardless of a check engine light being present or not, is to...

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