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L6-4.2L

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Question
I am looking into doing a engine swap on a 2006 gmc envoy xl 4.2 Liter engine 6 cylinder
Hi there. Unfortunately, this is not a service we offer. Your best bet is to search for an engine replacement shop locally. They will be better equipped to provide you with the correct recommendation.
Question
Check Engine Light is on
Hello, There are a number of reasons why the check engine light may come on related to the fuel injection system. Generally, the check engine light comes on when something fairly serious is going on with the vehicle. This can...
Question
I have a 2006 GMC Envoy. Makes a race car engine sound and the RPM goes high in 1st, 2nd and 3rd gear.
What you are describing may be a result of a faulty speed sensor, potentially low transmission fluid or a even a faulty transmission control solenoid. As your vehicle travels down the road, the computer analyzes data being sent by vehicle...
Question
My check engine light came on then turned off and it just keeps doing that.
Generally, the check engine light comes on when something fairly serious is going on with the vehicle. This can happen for many different reasons such as a faulty mass air flow sensor, a faulty O2 sensor, a bad catalytic converter,...
Question
The bolt that holds the plate for the power steering return lines, what size is it? Is it a torx? Is it a twelve point?
The bolt size that you need is 10 mm and the treads of 20 metric with a torque of 71 inch pounds. The best thing to do is take a thread gauge tool and check to see if the treads...
Question
Why the theft signal keeps on
Hi there. More often than not, this problem is caused by a stored error code inside the ECU that keeps the security light illuminated. If you recently replaced a battery or other primary electrical component, this may have triggered the...
Question
Jerking during deceleration.
Check all of the driveshafts in the jeep and see if any universal joints are worn causing the shafts to move around when letting off the throttle. The universal joints in the front axles are the most common joint to...
Question
replaced crakshaft sensor now car wont stay running and is making a clicking sound in dash.
Hi there. Sorry to hear you are experiencing this issue. Unfortunately, this is all too uncommon when an auto parts store reads error codes and makes the wrong diagnosis. If you were having misfiring problems, the crankshaft position sensor would...
Question
Car turns on like normal but won't move forward or in reverse.
Hello, the automatic transmission has three systems; electronic, hydraulic, and mechanical. You should check your fluid level as well as condition of the fluid. What you describe could be an internal mechanical failure with transmission. The electrical system which...
Question
Will low differential fluid in my buick rainier cause jerking when turning vehicle?
Hello, thank you for writing in. The rear differential will make the vehicle skip or turn roughly when backing up or in a forward gear. It will feel as if the 4 wheel drive is active, and cause issues with...
Question
I changed the battery and now my windows go up and down by themselves and I have a clicking noise from the door
Hello, thank you for writing in. When these types of electrical issue occur after changing the battery, there may be several things you have to try to rectify the issue. One would be making sure the battery is hooked up...
Question
Se enciende reduced engine power en ese momento no hace ningún cambio la caja de transmisión y el motor no pierde aceleración
Hi there. A Reduced Power light usually indicates a fairly serious problem with the throttle system. When this light illuminates the vehicle will often go into a “safe mode”, which will severely limit the speed of the car and in...
Question
I have a 2005 trailblazer
Your vehicle can use up to 15% ethanol with no ill effects and such use (of E-15 for example) does NOT require regular use of any particular fuel system "cleaner". Most gasoline vended these days already contains a sufficient additive...
Question
my vehicle is making a loud squealing noise, I think it is the power steering pump. it has been leaking fluid for awhile
Hello, thank you for writing in. The power steering pump is a very common place for the system to leak fluid. The pump can mechanically fail, it can crack, and more commonly the gaskets and seal fail. With that being...
Question
On highway,didn't know 4 hi was stuck on, weird smell, looked like gear oil or oil was leaking pretty good, seemed to stop in 2wd
Hello, thank you for writing in. Your vehicle is typically rear wheel drive, when you have it in 4-Hi then you are telling the front wheels to engage with the transmission. The fluid is then pressurized and the gears mesh...
Question
I started my car and turn on AC but it would not start.
It will take a bit of deeper diagnosis to tell what is going on with the vehicle as it seems you have multiple concerns going on. An air conditioning system with a low refrigerant charge may not turn on because...
Question
Oil pressure gauge drops, idle goes crazy and wanting to die.
Hi there. Either the engine oil pump is plugged up or failing or the engine bearings are worn causing internal oil leakage. The engine is running rough and wanting to stall due to the lack of lubrication. I recommend seeking...
Question
I have issues with my air suspension. I have been reading through the forum of the topic, and I believe it has to do with my compressor.
The pump will become loud when it is under pressure and lifting a load. If the pump is quiet and you hear a hissing sound around where the pump is, either the pump is leaking or the main supply hose...
Question
I have a Po171 code on a 2006 trailblazer
The cause behind diagnostic trouble code P0171 is easiest to find by looking at the secondary firing patterns on the Bank one cylinders. That will confirm if the too lean condition, that has caused the code to set, affects all...
Question
Can you bypass the AC compressor? 2004 Chevrolet Trailblazer
Hello - if the AC compressor clutch and bearing are still OK, you can simply unplug the wire to the compressor clutch, and the clutch pulley bearing will continue to turn with the belt, and no other action is necessary....

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