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L6-4.2L

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I have a 2003 Chevy Trailblazer.Recently my oil guage has been fluctuating downward from 40 and back up. It happens at stop lights
Likely causes are a defective oil pressure sending unit in the block or a stepper motor in the dash cluster (the one associated with the oil pressure indicator) that is malfunctioning. The fluctuation in the dash gauge that you are...
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
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
When I turn left clunking sound and when steered right a rubbing sound abs and stabilitrak light is on
Hi Adele. Thanks for contacting us today. There are several possible reasons why your warning lights are illuminated, and likely are the source of the noises you're hearing as well. Some of the possible sources include worn tie rod ends,...
Question
Hey I have a 2002 gmc envoy
Stalling when the vehicle is put in gear simply occurs if the engine cannot accommodate the load. Among the potential causes of that are faults in engine controls. A mechanic can test the throttle position sensor, idle control valve as...
Question
Ok so update I had my 2002 gmc envoy scan for codes to see if any news ones would appear also before that was done I went to YouTu
Trouble codes are not a diagnostic. All the codes represent are clues and occasionally the codes are far off the mark and you even have cases where codes will set simply as a consequence of another code (that is once...
Question
When your transmission is rebuilt, is your radiator replaced or checked?
It is not normal to replace the radiator when the transmission is rebuilt. However there are transmission cooler lines that lead to the radiator in order to cool the transmission fluid. It is possible that something was damaged on the...
Question
07 trailblazer 4.2 camshaft sensor code wont go away what do i do?
Hi Jenee. Thanks for contacting us today. It might be helpful for you to read this article about the P-0017 OBD-II trouble code. It's quite possible that the root issue is not the sensor, but the wiring harness connected to...
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
Car will not shift out of neutral.
The shifter is locked and that can be due to mechanical or electrical fault. On an emergency basis, the only recourse is if you see a "shift lock override" button on the console. If there is an override try holding...
Question
When i slow down my GMC Envoy shuts off and makes a humming noise like a toy car, told to replace the engine, noise is still there
If the humming noise occurs when the car is stationary with the engine on at any RPM, then it is engine or transmission related but the noise could originate from an accessory drive on the engine. However, if the noise...
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
Rough idle, dip in idle, no acceleration power, replaced cam postion senor, cleaned pistons, spark plugs, and vvt what else?
You should have the computer scanned for misfire codes to see if one or more cylinders are misfiring and may have a bad coil or plug wire boot. Also check for vacuum leaks in the intake gaskets since any of...
Question
when i activate my wiper blades on the delay i get a steady stream of washer fluid
Somehow power is being led onto the washer circuit and that might be due to a faulty combination type switch. You should test the switch first. That does require that you use the wiring diagram in the Service Manual. What...
Question
My car stopped when I was driving. The engine kept running and when I placed my foot on the gas with the car in drive it didn’t go
This can be caused by a problem with transmission shift solenoids or electrical harness to transmission. I would suggest to have the vehicle transmission scanned for problems even though no check engine light is on to try and locate or...
Question
My trailblazer turn off sometimes at a stop
If it stalls only when a/c is on then will need to have engine and a/c checked to see if it is engine idling too low or a/c compressor locking up causing the engine to stall. have a mechanic like...
Question
ive changed the thermostat, the radiator, got a new radiator cap, new water pump, (and yes it was very corroded, I super flushed w
If the center point of the gauge represents about 200 degrees, then there is no overheating and your car is operating normally. Normal engine temperature is in the range of 195 degrees F to 220 degrees F. If you suspect...
Question
Found an 06 trailblazer for parts sale. I currently have an 03 trailblazer will the parts be compatible if I buy the 06?
The engines, computers and wiring harnesses do NOT interchange for the 2003 and 2006 model years, at least not for the sub models I checked (there are many Trailer blazer sub-models; I do not know which sub-models you are referring...

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