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H3

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Question
How much is it to replace the rear main seal on a 2007 Hummer H3
Hello. It is common for the rear main seal to leak on this engine. Over time the seal fails and this occurs. You will need to take this to a shop that can remove the transmission to change the seal...
Question
Why does an Hummer H3 oil change cost more? 2003 Hummer H3
Hello - the H3 has a 6-quart oil change capacity, which is more than most engines these days (4 or 5 qts), and synthetic oil is recommended. These are the only 2 logical reasons for increased oil change cost. Hope...
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
Hello 2006 model Hummer car's fuel consumption too high
Hello: In most cases, the OBD-II error code you wrote down in your question is related to a faulty crankshaft position sensor. When this component is damaged, it can impact the ignition timing of the engine, causing increased fuel consumption,...
Question
The vehicle keeps turning off while driving. Hummer H3
Hello - the first task is to determine what problem codes are being set here. This will guide diagnosis, and tell whether it's a fuel supply issue (fuse, fuel pump relay, or fuel pump itself), or possibly an electrical sensor...
Question
I need a thermostat replaced do I need to replace the water pump as well
Typically, the scenario is the reverse: that is the water pump fails and the question is should the thermostat be replaced at the same time that the water pump is replaced. The answer is absolutely because the thermostat itself can...
Question
I have hummer h3 that needs a raditor i have the raditor need to know your labor fee and do have to buy antifreeze and.i have spar
To obtain the requested quote, please visit YourMechanic’s radiator replacement service page. Once on that page, click on "Get a Quote" and enter your vehicle information (year, make, model). You are welcome to buy your own parts and book a...
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
Climate control module. Heater core
Faults in electronic or mechanical control components in the HVAC system have no effect on the heater core in the passenger cabin. The heater core itself is not a component that would looked at as a cause of engine overheating....
Question
Rejects the nozzle when filling gas
Hello, It sounds like you may have an issue with your evaporative emissions control system. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects and temporarily stores the fuel vapors...
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
Engine whining
The typical cause of a whining sound during engine idle; which progressively gets louder during increase in RPM is a belt, pulley or faulty pump (either AC, water pump or power steering). If you didn't remove the AC belt, this...
Question
Is a 2007 Hummer H3 a reliable vehicle?
For the 2007 model year, GM replaced the problematic 3.5L engine with the 3.7L. This engine is pretty decent. The transmission is a 4-L60E, which is well known for having all kinds of issues. The GM 10-bolt rear end is...
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
Ball Joints / Suspension parts may be damaged.
The best thing to do is put the vehicle on jack stands and remove the tires to the suspension that is to be damaged. Then check the ball joints, control arm bushings, and the control arms and see if there...
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
P0420 motor mounts on a Hummer H3?
Hi Jimmy. Thanks for contacting us today. I'm in agreement with you - in that the replacement of engine mounts is NOT a solution to resolve a P-0420 Error Code. You should read this article about this code - to...
Question
Threw a rod in my 09 H3 3.7 can just the bad rod be replaced from the bottom side and what should it cost to have that done denver
The connecting rods can only be replaced by removing the piston from the engine. Pistons can only be removed from the top, ad that means the cylinder head has to removed from the engine. To access the rods on this...
Question
H3 hummer, loss of power when acceleration, traction comes on , replaced throttle body, MAF, pedal assembly codes po223,p2135,p21
Hi Justin. Thanks for contacting us today. Assuming you reprogrammed the throttle body to the ECU after replacing it, there are a few things that could be the source of your issues that the OBD-II trouble codes might help locate....

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