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L5-3.5L

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Question
Temp. Gauge rises when I'm stopped or idling and when I run the AC but not when I'm moving.
If you are getting overheating only at lower engine speeds with no obvious reasons, then you will need to check if there is good flow through the radiator using a laser temperature sensor. By doing this you will be able...
Question
I was just told my rear differential pinion seal was leaking when I got an oil change.
There is a seal that sits in between the two halves of your differential housing which keeps the oil inside of this housing from leaking. The oil inside the differential housing keeps the pinion gears lubricated. It depends on how...
Question
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 like this truck but wonder what you think about the Chevy Colorado
Hello. Consumer reports can vary greatly across websites and critics. If the truck is in good condition, and was well maintained then it will likely last you a long time, assuming you keep up the maintenance. I would recommend a...
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
Car turns over but won't start
Hi, thanks for writing in. If, during a "no start" session, waiting slightly more than 10 minutes allows you to successfully start your H3, the problem is not with the fuel system. A failure of the ignition switch (an internal...
Question
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
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
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
whining/grinding under truck as well as intense vibration throughout whole truck when driving over 80km/h
Hi there. It does sound like failing U-joints. They may simply be worn out due to age/mileage or have run out of lubrication and are now damaged. The driveshaft shouldn't be damaged from worn joints, but if they fail completely...
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
Thinking about motor swap
The main problem in such a swap is the engine computers for the two engines you are referring to are not interchangeable. And, you cannot flash re-program your existing computer to work with the new engine because the two use...
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...

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