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L5-3.5L

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Heater/air won't turn on
Try checking the relay. Sometimes when the relay is not getting a good connection this can happen. I would also check all of the fuses. Sometimes when they have too heavy of a load they will blow which will in...
Question
I need to know the diagnostic procedure for dtc p0717. Want to test wires before taking out transmission
If the sensor only has two wires, it is a reluctant AC sensor. If the sensor has three wires then it is a hall effect DC sensor. A two wire sensor will produce a sine wave signal: '()(-)()(-)(_)' or steady...
Question
I have a Chevy Colorado. DTC P0717. No input from trans input speed sensor. Need to know the circuit test procedure and sensor rep
Hello, I have provided a link below that will help you with your issue, if you click here
Question
Q: Engine Oil
It is a bit unclear what the question is but assuming you are looking for an oil recommendation, it would depend on the driving habits and conditions the truck is subjected to. Since it has been 28k miles since the...
Question
Part fell from above brake/gas pedals.
The part is not a Chevrolet part but an aftermarket alarm system that was installed on the truck. Most of the time the part is just stuffed up inside the dash or wire tied to anything underneath the dash to...
Question
Why is my truck running hot? Where is my coolant going?
When a vehicle overheats when at a stop, this is a sign that the cooling fan on the front of the motor is not pulling enough air through the radiator. Of course, if you are loosing coolant, this can cause...
Question
Reduced Power and P0601 code is found in computer.
Hi there. The P0449 evaporative code is on for either an electrical circuit malfunction to the vent solenoid or the vent solenoid on the emissions circuit has failed. The P0601 code comes on when the computer can no longer register...
Question
Q: door lock problem
Hi there: Based on your question and the information listed, it's possible that you've got an exposed wire somewhere in your vehicle that is causing a short with your door locking mechanism. Sometimes this issue is caused by a faulty...
Question
The power locks are not working on three of the doors
As unlikely as it may be, you could have three failed door motors; it has happened to me in the past. However, fuses, relays, a master switch, or the BCM could also be at fault. Check all fuses/relays and replace...
Question
Q: door lock problem
Hello. There is a computer that controls the door locks and the warning light that you see. It is known as the Body Control Module. Something has likely gone wrong with this module, which may or may not be repairable....
Question
whinning noise
Hi there. In most cases, when the engine makes a whining noise that increases as your vehicle accelerates, it's caused by a drive, serpentine or alternator belt or the belt's pulleys. It's possible that your serpentine belt was replaced that...
Question
Have replaced power steering pump three times. Works well for about a day and then stops. There is no leaks.
Hi there. The issue is not the pump. The pump will fail if the power steering control valve sticks and stops working. The power steering control valve is located in the rack and pinion steering system. If you need further...
Question
Crankshaft replacement fit? 2006 Hummer H3
Hello - the crankshaft on the 3.7l LLR engine does in fact have the same stroke as the L52 3.5l engine in your H3, so there is a good chance it is compatible. Check with your Hummer parts specialist for...
Question
I have a code P0171 and needs repairs.
Hi there. The code P0171 is caused by the engine getting too hot and not having enough fuel to burn. Check the fuel injectors, fuel pressure, and the fuel pump to see if they are working properly. Since the vehicle...
Question
what would the cost be if we supply the radiator
Besides the 4.0 hours labor at your local charge per hour rate you will need to also supply the coolant for the engine and also the refrigerant to recharge the air conditioner after repairs are done. The A/C needs to...
Question
What is the best oil to use?
Hi there. If your engine is consuming too much oil, then I would consider checking the (PCV) Positive Crankcase Vent Valve and see if its plugged up. A PCV valve can plug up causing the engine crankcase to over pressurize...
Question
Slow transmission fluid leak which the mechanic I went to says was caused by a faulty seal even though it was replaced last week.
Hi there. The problem with trying to diagnose this transmission fluid leak issue you have with the Hummer is that it's quite possible that the leak could be caused by multiple issues. Certainly a loose transmission fluid tube or damaged...
Question
brake smell is burning
Hi there. It really depends on what is causing the smell and what type of smell it is that would determine the source. If you notice brake fluid smell, it is usually caused by a brake line that is loose....
Question
P0300 Random misfire.
Without seeing the fuel trim readings in the computer to see if the engine is running too lean then it would be a guess that you have a vacuum leak between the mass air sensor and the intake manifold or...
Question
excessive belt material residue wearing onto idler pulley coating or paint on idler pulley wearing abnormally
Hi Scott. Thanks for contacting us today. Any time a serpentine belt is replaced, it's recommended to replace the pulley and tensioner at the same time. Older tensioners and pulleys will create more heat when they are older and can...

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