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Envoy

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Question
Wheel keeps humming, I think it's a wheel bearing
Hi, thanks for writing in. I believe you're on the right track. Wheel bearing failures are common on many GM vehicles particularly their trucks and SUVs. I would recommend having your wheel bearings inspected with a mechanic's stethoscope to determine...
Question
P0442
As you may already know, this may be related to a faulty or leaking gas cap, however this can also be related to several other factors such as the following: A non-conforming gas cap (i.e. not factory/original brand) A...
Question
Loss of power my tool says map sencors is bad burning rich
Hello and thank you for contacting YourMechanic. If the engine light is on for code P0105, then the computer has lost communication from the MAP (Manifold Absolute Pressure) sensor. Check the harness to the sensor for any corrosion and look...
Question
My shifter cable bushing broke can you fix this with out changing the cable?
As long as the shift cable end is not damaged and can hold a new bushing then a new bushing can be installed. Most models have an aftermarket bushing on the market. The dealer in most cases do not make...
Question
My car is making a clicking noise when I turn. 2002 GMC Envoy
Hello. If the vehicle is four wheel drive then it very well can be an axle that is failing. If the vehicle is two wheel drive then it does not have axles in the front. If that is the case...
Question
Won't açcelerate and no power
Hi there: Anytime a vehicle strikes a very large object, like a deer, the chances for electrical connections throughout the vehicle to come loose is very high; and can cause issues you're experiencing. The issue may be a TPS or...
Question
Shuts off and won't start for about an hour or so
Hi there. From the description you have provided concerning your vehicle's drivability problem, it hard to discern whether it does not turn over, or it does not start for about an hour after driving. If your vehicle will not turnover...
Question
I have a problem with my truck vibrating.
If a motor vibrates while in park idling, there is either a balance issue with the motor or an engine mount problem. Locating such problems is not for the faint of heart. There are several techniques that can be done,...
Question
Does the throttle position sensor and thermostat need to be changed before I take a three hour trip?
The code for the thermostat is due to the engine coolant is not getting up to operating temperature quick enough and is due to a stuck open thermostat most likely. The TPS code may be an intermittent issue with sensor...
Question
How Can I Fix The Left Headlight Bcuz It Dosent Light Up When I Turn On The Truck And I Bought A New Light And It Still Didnt Work
One headlight not working can be due to a few causes. First, check the fuses. Some vehicles have an individual fuse for each headlight. For example: Left low beam, right low beam, left high beam, right high beam. If the...
Question
The service 4WD/Service Engine Soon Light is on, and my car has front end noise.
Hi and thanks for contacting YourMechanic. This sounds like the front differential has medal particles in the gear assembly, and if so, you will have to remove the differential and have it diagnosed from the inside to see what bearing...
Question
Squealing loudly when driving up to 60 km an hour
Hello, the noise you are hearing may be brake system related. The brake pads located by the tire area have audible sensors to indicate the pads need to be replaced. I recommend getting a brake inspection done as soon as...
Question
Coolant leak - 2002 GMC Envoy
Hello. If the coolant leak is coming from a location near the cooling fan, this may suggest your water pump may be leaking. A common place for this to happen is from the water pump shaft as there is a...
Question
Oil pressure
The oil pressure should never read "0." It will be very low, usually around 15-20 psi, but should never be "0." There are a number of factors to consider in terms of oil pressure such as the viscosity of the...
Question
My check engine light is on
A vehicle that has a problem with the engine or power train can turn on the check engine light and set a code in the computer. The list of possible codes and problems are in the hundreds. You will need...
Question
Car starts with remote not key
Hi there: Although it's very rare, sometimes overuse of an accessory power outlet can cause an electrical "glitch" to occur that causes the issue you're experiencing. The best way to rectify this issue is to download any stored error codes...
Question
Why do I have a knocking/grinding sound coming from the front left tire area on my 2007 GMC Envoy
Hello. This can be caused by a number of things. If the noise only occurs when going over bumps then it is possible that you have an issue with the strut on the suspension or an issue with the ABS...
Question
Oil leaking from top left side of engine, could that be the vavle cover gasket?
Oil leaks at the top of engine could be at valve covers, intake manifolds, head gaskets, cam seals, PCV valve grommets and tubing and related components. The best thing to do, to get the source of the leak identified, is...
Question
Loud noise coming front front end.
You should have the tire n the left front checked to see if it is wearing incorrect causing the humming noise. The alignment on the front may be out from a loose upper or lower control ball joints or bushings....
Question
Oil Pressure Gauge
This light will usually come on when one of two things are happening. Either the motor is in fact low on oil or the oil pressure sending unit is not working properly and may be producing a faulty reading. I...

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