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Silverado 2500 HD

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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
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
Is there a difference in power steering pumps for a 2003 2500hd and 2500 p/u with the duramax
According to the AC Delco catalog, the OEM (original) pump used in the 2500 is A/C Delco part number 15909826. The OEM (original) pump used in the 2500HD is part number 15909827. Although there also "appears" to be a generic...
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
Codes p0708 and p0706 show up i can drive and shift fine one trip the next trip it will act up.
Hi there. The P0708 trouble code means that the Engine Control Module (ECM) has detected a malfunction with the transmission range sensor. A mechanic would begin the diagnosis of the P0708 trouble code by finding the manufacturer’s suggested procedure for...
Question
I have a 2015 Silverado and beginning yesterday, the horn honks two brief bursts as I turn the key. How do I disable?
Hello, thank you for writing in. Typically this is a sign that the vehicle is trying to tell you something. The first step is going to be scanning the vehicle for diagnostic codes to see if there is an issue...
Question
I replaced my compressor clutch on my 2005 Duramax and it started working working again I added some more refrigerant and it is at
Hi there. Sometimes a new compressor installation will not produce the desired level of cold unless the high pressure and low pressure hoses are also swapped, pressure checked for leaks and tuned after adding refrigerant. In other instances, components beyond...
Question
My 2500HD wont fire. But its turning.
Check to see if there are any stored diagnostic trouble codes. Be sure you have a fully charged battery that passes a load test. Confirm that the engine immobilizer system (security system) is not activated thus preventing the car from...
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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