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L6-4.2L

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My oil pressure rises and lowers.
The faults that have caused the check engine light (CEL) to illuminate should be repaired because if the check engine light is constantly illuminated, any new faults that occur will be invisible to you. If the CEL is already and...
Question
Both of my headlights went out on my 2008 Chevy trailblazer I changed the plugs and checked the fuses no luck
With the headlight switch on, check for battery voltage at the bulb socket. Based on what you are describing, it sounds like you may find no voltage at that point. If that is the case, the circuit must be traced...
Question
VEHICLE OIL PRESSURE LOW VEHICLE DIDNT START NOW RUNNING FINE
Hi Nick. Thanks for contacting us today. There are several things that could cause the oil pressure and overheating problems. In most cases, a damaged oil pump or damaged oil pressure sensor are the leading sources of zero oil pressure...
Question
Metallic rattling while driving coming from front driver side wheel? Did initially have grinding sound from a stuck caliper.
You will need to have the calipers and brake master cylinder inspected for sticking and internal seals problem. If the pedal goes to floor with no leaks then this is the master cylinder leaking internally by the piston cups. ...
Question
Rep light is on and now wont start like not getting gas car was runing and cut off and would not re crank
You should have the computer scanned for additional codes and also check the fuel pressures to see if the no start is a computer sensor issue like crankshaft sensor or the fuel pump is not giving pressure.
Question
Fuel pump fuse blowing
One of the most common causes for fuses to blow consistently as a shorted wire. There is either a short to positive which means that one wire that has power is shorting with another wire that has power. You could...
Question
My envoy 2008 will turn over has spark won't start
Hi Joanna. Thanks for contacting us tonight. Assuming that your Envoy has spark (and the ignition timing is correct), then your starting issue will likely be due to a fuel delivery or mixture issue. Some of the common component failures...
Question
Air injection reactor pump continues to run after engine is switched off.
This would likely be due to a stuck relay. Most faults in the air injection system will show up in downloadable trouble codes so you can attempt to find clues there. If the system is powered off (or commanded off...
Question
My 06 Chevy trailblazer gear shift fell off
The shift cable ends go bad and get worn and will come off of transmission or at shift lever connection. You will need to replace the cable end bushing if replaceable or replace entire cable to repair it.
Question
My 02 Chevy Trailblazer Has a rough idle and sometimes the RPMs go up withiot the car increasing speed
The first thing to check for in any idle or drivability problem is air leaks. Any air that gets into the engine without being measured will lean out the system and cause problems. Look at all the rubber hoses and...
Question
Bright lights come on when I use right blinker. Do I need Turn Signal Hazard Switch or the Turn Signal Lever?
Hi Redcgarland. Thanks for contacting us tonight. It really depends on what is actually causing this symptom to occur. While it's possible that the turn signal lever is damaged, it's more likely that you have an electrical short within the...
Question
Installed mew battery in 06 trailblazer now it wont start it cranks but wont start
This may be related to many different possibilities, some of which may be related to a lack of spark or possibly timing issues and some of which may be related to a fuel delivery problem or a combination of both....
Question
08 trailblazer idles rough at light then hard vibrate when start to accelerate
The first thing to check for in any drivability problem is air leaks. Any air that gets into the engine without being measured will lean out the system and cause problems. Look at all the rubber hoses and boots under...
Question
I have a 2002 trail blazer and this happen to. Me I was driving and my truck just stop wouldn't move at all all my lights work but
You should first check to see if the transmission fluid is full and check fluid for burning smell indicating the clutches are burnt. If fluid is good and not burnt then you may have broke the transmission input pump shaft...
Question
Check engine light on code reads engine misfire what part should I replace first and if that dose not work what next
Replacing parts until the car is fixed can be a very expensive way to do a repair. A thorough diagnosis can save you time and money. But if you have misfire codes, the last digit of the code should indicate...
Question
2003 gmc envoy ignition got broken from someone and i need to drive it how can i bypass the anti-theft locking system???
The anti theft system is integrated in the engine and body computers and cannot be bypassed. You will need to replace damaged component and if you have original key the system will start with old key held next to new...
Question
I have a knocking coming from my engine I have a 2006 trailblazer ls 4.2 4x4
Unfortunately when you hear a noise coming from your engine that could be due to a number of different things. Everything you have mentioned are possible causes of this issue. There are also other possible causes that were not mentioned...

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