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Silverado 2500 HD

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Question
Check engine light flashing at hwy speed
Have a certified technician start off by scanning the system for fault codes. When the check engine light is on faults will be stored in the system. These faults will give the technician a direction to take do diagnose the...
Question
My 4WD is not engaging. Is a 2007 Silverado have electronically controlled axle actuator or vacuum? Or is my problem in the hubs?
Hi there. The actuator on your 4WD system to your vehicle is electronic. Most of the Silverado 2500 model Chevrolet trucks have issues with the actuator failing in the front axle due to weather and road conditions. Check the harness...
Question
What would cause the motor not to crank and the dash lights to stay on? 2005 Chevy Silverado 2500
Hi - check fuses first, then check the engine wiring harness, especially the starter wiring, for correct re-connection. The behavior suggests either no engine-to-chassis ground, or incorrect wiring. Either or both appear to be "back-feeding" 12 volts to the dash...
Question
Heater is blowing cold air truck is overheating and now I reduced power engine power light is on
The heater not working in some cases may be related to the overheating problem you are also having. This may be due to a faulty heater blower motor or potentially a bad heater core. As you may know, the heater...
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
My 2004 Chevy Silverado is having cooling system problems
Hi there: On a 2004 Silverado 6.6L Diesel there is a heater hose bypass valve that opens when the heater is activated. Sometimes this component can become stuck due to corrosion inside the coolant lines or a sensor that has...
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
Leaking coolant - 2004 Chevrolet Silverado
Hi there. Depending on what edition of the Silverado you have the leaking coolant may be coming from the radiator overflow reservoir. It might also be a heater bypass tube that's damaged. The reservoir is used for overflow, as coolant...
Question
Reduce Engine Power Light is illuminated
This light comes on generally when there is a critical system failure or problem with the engine or transmission. The purpose of this light is to keep the driver safe and to prevent potential major damage to the engine or...
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
My system says there is water in the fuel
Hi. Yes, water in the fuel will cause knocking. I would advise doing a fuel system maintenance - drain the fuel system all the way to the tank, including the tank. This will get rid of any water and contaminated...
Question
Voltage drop noticed during night driving. The headlights dim and then return to normal.
This may be a sign of a failing voltage regulator or potentially a bad ground connection. As you may know, the voltage regulator regulates the charging of the battery by the alternator. When the voltage regulator is not working properly,...
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
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
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...

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