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Express 3500

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Question
Problem with a wheel bearing.
A mechanic will have to check to see if you have a wheel bearing that is noisy when they test drive the vehicle. You are not specifying the front or rear bearing noises. The front is part of the front...
Question
Can't turn off antitheft system
If the anti-theft light is on then the vehicle is not going to start. You may have a defective code key. If you have another key then I would suggest you try it to see if the problem goes away....
Question
Engine overheating replacing thermostat
Hello. Let me start off by saying that it is just as bad, if not worse, to run an engine with no thermostat as it is to run it with a bad one. It will also cause engine damage. It...
Question
P0300 codes while idling
Hello. If unplugging the MAF sensor causes the engine to run better then there is a secondary air leak into the engine. This means that there is a vacuum leak from someplace. Most of the time on this engine it...
Question
CEL transmission slipping
Hi there. You definitely appear to have a voltage issue with the vehicle. From what you are can be a bad connection at the battery, a failing alternator, or most commonly a bad ignition switch. I usually start by checking...
Question
AC makes noise after putting on expansion valve
Hello. It sounds like your new compressor may be failing. Flushing the system is not enough when the compressor fails. When there is debris in the system, it gets stuck in the expansion valves, the condenser, and the accumulator. If...
Question
Got oil change made it to gas station and it cranks but won't start
The cause for the van not starting should not be related in any way to the oil change. The only thing that may have happened could be the mechanic may have accidentally bumped a sensor or a wire. I would...
Question
Transmission makes high pitched whistle intermediatly
Hi there. The whistling noise from the transmission could be either a thrust bearing failing or a clutch pack is slipping under certain conditions. First check the fluid to the transmission and make sure that its full and red in...
Question
I got pouring out as fast as I put it in the radiator it's on back passager side
Hello, thank you for writing in. The vehicle is likely leaking from a hose or heater core. There are several components on that side of the vehicle. Are there any signs of moisture inside the vehicle? If not you will...
Question
My car sputters when cold but idles smoothly after warmup - 2003 Chevrolet Express 3500
Hi there. Beyond the MAF sensor, in most cases, an engine that stumbles when it's cold is caused by one of three different components: clogged fuel injectors, a dirty throttle body, or an EGR valve that is damaged or also...
Question
The oil gage reads full over, even with the engine not running but ignition on.
The most common cause of the problem can be the oil pressure sender unit needs replaced and and the filter screen below it needs removed and cleaned. When the pressure sensor is removed you should have the oil pressure tested...
Question
no heat coming out of heater
Hello, thank you for writing in. Check the radiator hoses as well, and make sure both are warm if not hot. If the engine itself is running too cold, by the time the coolant gets to the heater core it...

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