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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
No crank no start.
Hi there. Check the battery cables and make sure that they are tight and clean. Check the cables that attach to the starter and make sure that they are all tight and clean. The starter remote wire could have an...
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
Truck wont turn on
Hi there - the symptoms you describe suggest the alternator may not be charging properly, or the battery may have failed. Many auto parts stores will check these for you for free on a time-available basis. If that is not...
Question
Reduced Engine Power and Truck won't start. PLEASE HELP ASAP! Thanks!
Hello, thank you for writing in. The reduced power light will either trigger when there is malfunction with the vehicle and it is trying to protect itself, or when the engine actually suffers a loss in power and is struggling...
Question
Transmission stuck in gear in Drive 2007 Chevrolet Silverado 2500
Hi there - it's possible that your problem source is the torque converter lockup clutch NOT releasing as the truck slows down. This would lug the engine as though it's in top gear until vibration, or an engine stop/start sequence...
Question
Have a 2016 Chevrolet Silverado HD 2500 4wd but also a button or lever under radio with a vehicle with squiggly lines behind it I'
Traction control works by controlling throttle input and braking. If the road conditions are slippery and the system senses wheel spin, the electronics will either reduce the throttle input, apply brakes to individual or numerous wheels, or both. Traction control...
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
It is acting like it has a governor and spitting 2001 Chevy Silverado 2500 HD Diesel
Hi there - the loss of power you describe could be due to loss of pressure from the turbocharger or a lean fuel mixture. Check transmission fluid as well to be sure there is no problem with power transmission from...
Question
Service engine light 2002 Chevrolet Silverado 2500
Hi. There could be several things causing this issue. The most common cause is the spark plug or ignition coil or spark plug wire is bad and is causing a misfire condition in cylinder one. There could also be a...
Question
Enging not reaching operating temperature and heater not getting hot
You need to have the cooling system fan clutch checked to see if it is keeping the fan running high speed even when cold. With engine idling with the engine cold you should have very low air flow from the...
Question
I have the abs light on and know it was one of the sensors bad. I pulle dthe fuse to the ABS so it wouldn't affect when my daughte
Hi there: I would strongly recommend that you reinsert the fuse that operates the ABS control module. A warning light typically indicates that a sensor is faulty, however, removing power from the module will disable the system; designed and mandated...
Question
Starting when its cold
This sounds like you may have bad batteries since the block heater only helps the engine to start in the cold but the battery still has to turn the engine fast enough to start the truck. Since a jump start...
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...

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