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C2500

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Question
Very sluggish almost dies on idle till I get to about 20 mph, have replaced ignition module, plugs, rotor and distributor cap.
This is a sign of a failing idle air control valve. This is a unit that is located on or near your intake manifold that monitors the air intake as it is mixed with fuel prior to being injected into...
Question
Mass air flow sensor
Hi, thanks for writing in. Replacing parts is not a cheap way to try and find a problem. You should have the computer scanned to see what codes are stored. You may have to clear the codes and then see...
Question
How hard is it to switch an nv 4500 transmission from 2 wheel drive to 4 wheel drive in a Chevrolet.
Hi there. There are a couple of ways to convert your transmission from 2WD to 4WD. You could install a transfer case and have a short drive shaft go to it from the transmission. Another was is you will need...
Question
Fuel gauge bounces around, usually when it is on full
More often than not, this issue is caused by a faulty fuel gauge sender. However, it can also be caused by issues with the EVAP canister or other EVAP components. The EVAP system is designed to filter out harmful toxins...
Question
My truck cranks but it won't start - 1994 Chevrolet C2500
Hi. A couple of things to check: When the engine is at top dead center, does the rotor under the distributor cap point to the number 1 cylinder? It is very important that the engine is at top dead center...
Question
Is there an easy fix to a 700R4 transmission pump problem?
Hello there, many faults will cause the transmission in your 1990 C2500 to lose forward and reverse gears. The most common causes of transmission issues are low oil level, fluid leaks, shifter linkage faults, or shift solenoids. You stated the...
Question
No injector pulse but does spark.
Hello There, You are correct in that if the crankshaft position sensor or the pickup coil were bad there would likely not be any spark to the plugs. In relation to your no injector pulse problem, check the wiring harness...
Question
I have a clicking noise coming from my serpentine belt.
Hi there. To see if the idler pulley is making the noise or the crankshaft pulley is making the noise, simply remove the serpentine belt from the engine and start the engine. If the nose goes away, then a pulley...
Question
What would cause my 4 wheel drive not to work in my 1989 Chevrolet 2500
Hello. If the fuse is melting right when it is installed then there is a short in the electrical system for that circuit. I would need to know exactly which fuse it is to know where to start but most...
Question
Intake not fitting onto the cylinder heads.
Hi there. The cylinder head design changed in 1996 to accomadate for the new EGR setup and have a different bolt pattern. Look at the bolt patterns on the intake manifold and the bolt patterns on the cylinder heads. The...
Question
Why does my truck wander when driving down the street 1990 GMC C2500
Hello. You need to start by having the bushings in the control arms checked. If the bushings are cracked or stretched then this will occur. If the bushings are fine then you may have an issue with the pitman arm...
Question
I have a 98 Chevy Silverado truck 5.7 liter that also has an alarm. Lately, at times, my truck won't start.
Hi there. The could be an issue with the immobilizer system in your vehicle setting the security off causing the engine to not start or not have any power to the ignition switch. If the immobilizer is working properly, then...
Question
Turns two the left all by itself when started
Hello, thank you for writing in. The vehicle's power steering system needs to be inspected. There is some kind of pressure build up inside that is causing the steering to assist itself a little too much. First check the level...
Question
Vehicle stalls while turning left.
Hello, and thank you for writing in. The first thing you should do, considering the power steering pump is driven by the drive belt, is make sure the belt tensioner and the drive belt is tight, clean, and dry. If...
Question
Vehicle stalls, loss of power, rough idle.
Hello, As you may know, code 54 relates to the fuel pump relay which means that there is likely a faulty connection or low voltage to the fuel pump relay. The ECM monitors the voltage to the fuel pump from...
Question
what other year and make can I use the transmission out of
Hi there. I think you might be better served to contact a local transmission replacement shop or research online for advice on this matter. We focus on completing OEM repairs and maintenance; and wouldn't recommend attempting this type of swap....
Question
When I hit the ignition my gauges jump but the truck will not turn over and when I hit the brakes the head lights come on
Hi there. Trying to diagnose complex electrical issues like you've described can be very difficult. It could be a simple ground wire that is not correctly secured, or the main replay or ignition relay is damaged. The best solution to...
Question
Idle problem
Hello and thanks for writing in. What you are describing sounds like a dirty or failing idle air control valve. The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into...
Question
If my wheel cylinder is bad and i am replacing how many do i purchase for a 1998 chevrolet 2500
Hello, thank you for writing in. You can replace just one brake cylinder at a time. If one has failed, the others are likely just as worn and may follow suit shortly. If you are in a position to replace...

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