Check to see if the cooling fan clutch (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-fan-clutch) is fully engaging when the engine is heating up. You can test this by putting a tissue in front of the radiator or condenser to see if the fan flow is...
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...
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...
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...
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...
Hi there. If your engine is consuming too much oil, then I would consider checking the (PCV) Positive Crankcase Vent Valve (https://www.yourmechanic.com/services/positive-crankcase-ventilation-pcv-valve-replacement) and see if its plugged up. A PCV valve can plug up causing the engine crankcase to over...
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...
Hi there. The P0449 (https://www.yourmechanic.com/article/p0449-obd-ii-trouble-code-evaporative-emission-control-system-vent-valve-solenoid-circuit-malfunction-by-spencer-clayton) 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 (https://www.yourmechanic.com/article/-p0601-obd-ii-trouble-code-internal-control-module-memory-check-sum-error-by-spencer-clayton) code comes on when the computer can no...
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 (https://www.yourmechanic.com/services/door-lock-relay-replacement) and...
Hello, I have provided a link below that will help you with your issue, if you click here (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-transmission-speed-sensor)
Hello. MAP stands for manifold absolute pressure. So the answer to your question would be that it is the manifold absolute pressure sensor that there is something wrong with. The map sensor reads the pressure in the manifold and sends...
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....
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...
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...
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....
Hi there. The code P0171 (https://www.yourmechanic.com/article/p0171-obd-ii-trouble-code-system-too-lean-bank-1-by-andrew-quinn) 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...
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 (https://www.yourmechanic.com/services/power-steering-control-valve-replacement) is located in the rack and pinion steering system. If you need...
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...
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...
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...
