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Sierra 2500 HD

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Question
Water damage to electrical components after a flood. Is there anyway for the electrical to be tested?
Many times when a vehicle has been involved in a flood, it is typically considered to be totaled. There are so many electrical systems in newer automobiles that it would be very tough to test everything for water damage. I...
Question
ABS light on, brake light on
A few different faults may be causing the ABS and brake lights to intermittently show on your 2001 GMC Sierra 2500. You are correct that the ABS brake control module could be a potential cause. The most likely causes would...
Question
How to change blower resistor
Remove the sound insulation panel located under the right side of the dash, by passenger's footing area. Disconnect connector to blower resistor next to blower motor and remove the two screws. From there you'll be able to remove resistor from...
Question
Fuel filter loses its prime and the Check Engine Light is on - code P0907
It sounds like you may have an issue with your fuel pressure regulator. If the fuel pressure regulator is malfunctioning, this can cause a loss of fuel pressure. If fuel pressure is lost or drops below the manufacturer's specifications, the...
Question
Why does my vehicle go into reduce engine power mode. 2008 Chevrolet Silverado
Hello. I would need to know what code you are getting to know what needs to be done to take care of this. If you are getting a MAF code then the sensor may be failing, but that will not...
Question
P0483, with engine overheating.
Hello. P0483 is the trouble code a "Cooling Fan Rationality Check Malfunction. If the computer detects a discrepancy between the cooling fan's commanded state of operation, versus the actual state of the circuit, it will set off this code to...
Question
Where is the cmp located
The camshaft sensor is mounted straight down into the top rear center of engine block behind the intake manifold. The sensor is held in by one bolt and is pulled straight up out of the block.
Question
duramax running crappy in cold weather
Hi there. In most cases, when an aftermarket tuner is utilized, traditional OEM diagnosis of problems is extremely difficult; since they impact both electrical and mechanical fuel, and ignition systems. Your best bet is to have a professional mobile mechanic...
Question
Reduced Engine Power Light is on - 2006 GMC Sierra 2500 HD
Hello. Reduced engine power is commonly caused by fuel flow restriction issues or fuel/air mixture problems. Some of the components that could be dirty or faulty include the fuel injectors, the throttle body, or the EGR system. The best...
Question
Car runs fine when idling but while driving it sometimes shuts off and I have to wait a few minutes to fire it up again.
Hi there. When the engine stalls out, the power steering and the power brakes will stop working for they need the engine to operate to make them work properly. For the stalling issue, check all of the sensors on the...
Question
How do I fix my fuel gage in my truck?
This is a problem likely related to your fuel tank sending unit.This is a small float type component inside your fuel tank that measures the level of the fuel inside the tank. As the fuel level drops, the float level...
Question
transmission
Hi there. It would probably be smarter to trade it in as is, rather than trying to repair the issue. To be honest, your trade-in value at a dealership is probably going to be less than the "value" of the...
Question
Why does my truck run rough after leveling it out 2003 GMC Sierra 2500HD
Hello. You should not need to turn the torsion bars all of the way up to level the vehicle out. This will make the vehicle ride rough and it will put excessive strain on the torsion bars which can cause...
Question
Broken crankshaft position sensor
It depends on where the sensor broke as to whether it can still be removed. In most cases, a professional mechanic would remove multiple components that would make it easier to access. Once it's clear, you can usually use a...
Question
How much will it cost to have a mechanic fix it?
Billing question was sent to CS for the cost of replacing the crankshaft position sensor on a 2001 GM Sierra 2500 HD with a V8-8.1 engine.
Question
limp mode
This problem may be a wire connection or TCM or PCM issue. The first thing that has to be done is to get communication with the TCM. The different computers communicate all to the engine computer and then to the...
Question
My trans hot idle engine it's in mornings when he turn on truck
It sounds like your transmission is overheating. I would recommend having the fluid level and condition checked first. If the fluid level is low, I would recommend topping it off and checking for leaks. If the fluid level is not...
Question
2006 GMC 2500 HD P0101 Mass ari flow sensor (MAF) performance
The powertrain control module (PCM) sends the mass air flow (MAF) sensor a 12-volt reference signal. Incoming air flows over a wire inside the MAF, which allows it to measure intake air temperature, and therefore air density. The MAF then...
Question
Only seem to have 4 Low forward and reverse and reverse 4 HI only.
The transfer case may have damaged the shifter rail or the synchronizer on the shifter rail. I recommend seeking out a professional, such as one from Your Mechanic, to help you diagnose your transfer case.
Question
Allison trans in 2001 gmc 2500hd will sometimes "whistle" when put in reverse
It is possible that there could be a restriction in the flow of transmission fluid when in reverse. I would recommend a power transmission flush to resolve that issue. It is also possible that there could be an issue with...

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