Question about 2002 Chevrolet TrailBlazer

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2002 Trailblazer is reving really high before shifting.

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If there is lack of power too, then a common item for this is a restricted catalytic converter. A back pressure test can be done with the right tool through the O2 sensor. Usually the hotter it gets the worse it gets with a plugged converter

Posted on Jun 16, 2009

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I have an 05 trailblazer when driving down the road and letting off the gas after coasting and steping on the gas the engine does not want to shift gear. the engine will shift after the rpms reve high and...


JohnHi Besh, take the vehicle and have your dealer drain the transmision fluid and replace the gearbox oil filter. the vehicle has been in use for several years and I wonder if you have ever had the fuid replaced. it is advisable to have this proceedure caried out at least once a year. do that and then let us know if there is a difference? regards John

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I have a 2004 Trailblazer and my rear a/c starts out blowing cold air but gets warm shortly after but the front a/c keeps blowing cold air all the time???? what could cause that ????


Just a little low on freon can make it get too cold and it freezs if you in position to check the freon level you'll find with the system on high and the engine reved up the low pressure is below 25PSI. fill it to reved up is above 25 and your problem will go away. Low on freon will make it cold enough to frezze up and then warm up as the air does'nt go though the ice. it'll work good as you start up till it frezzes and after it's stopped up with ice it blows warm (it's really too cold). the more freon in the system the warmer it'll all blow because all the pressures are higher and it's the difference in pressures that make it cold.

Aug 24, 2011 | 2004 Chevrolet TrailBlazer

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The car starts right up perfect its just when you start going it shifts from first well, then in second and third gears it revs really high before shifting tothe next gear, it doesnt seem to shift well, it...


Without getting into transmission diagnostics that would require special tools, you can check the transmission fluid level. You could also drain and replace the trans fluid to see if this solves the problem. Changing the fluid is considered regular maintence, and will not hurt a thing. The trans will benifit from fresh fluids in the long run also.

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My 2002 Chevy TrailBlazer sounded like a jet taking off...it was the clutch fan.

Jun 23, 2010 | 2002 Chevrolet TrailBlazer

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My autotransmission will not shift when starting out Ineed to back off the gas so it goes to 2,000 RPM and then shifts if not it will just run high rpm and really not go that fast .


You either have transmission shift solenoids that are faulty or internal problems. Try having a technicion hook a scanner up and have the solenoids tested while being driven. That will tell u your answer. Thanks Josh

Nov 22, 2009 | 2002 Chevrolet TrailBlazer

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2002 trail blazer is reving up really high before it shift gears


check the fuse for your cigerette lighter, I just had my trans teplaced, and the guy told me that the fuse for your cig lighter also runs the computer to the trans

Jan 21, 2009 | 2002 Chevrolet TrailBlazer

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