Question about 2009 Chevrolet TrailBlazer

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My 09 trailblazer runs really loud when I first start the engine.

Its sound like there is a whole in the muffler or somthing to do with the muffler. As it warms up the loud noise goes away and it sounds normal. Until I start it when its cold. Then its loud again.

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  • Chevrolet Master
  • 2,101 Answers

That is the exhaust pipe gasket . it is on the front pipe going to the exhaust manifoldMy 09 trailblazer runs really loud when I first st - 12_7_2012_5_22_16_pm.jpg

Posted on Dec 07, 2012

Testimonial: "OK. Thanks. That makes sense. I'll get it checked out. "

  • teds repairs
    teds repairs Dec 07, 2012

    thank you for rating my answer ,and I am here to help

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SOURCE: Noisy rattle in engine compartment of 2003 Impala on cold start.

Take a broom handle(with the broom removed) or long heavy dowel rod , start the engine when cold and place one end of handle to your ear and the other to different parts non-moving parts of the engine compartment,including the engine to narrow down  the location of the noise. 

Posted on Dec 22, 2008

  • 45 Answers

SOURCE: Chevy Trailblazer Engine very loud when starting

it's too early to tell. i,ve never known a light to come on because of a thermostat.you need to see what code was stored. without knowing,im just guessing. but my first thought was a plugged up catalytic converter. that explains the low power,also fuel filter.

Posted on Apr 29, 2009

  • 3 Answers

SOURCE: Lifter ticking when I start my 1999 Chevy Tahoe

Your lifters have become clogged over the years. Its only after the oil warms up and thins out does it allow oil to "pump up" the lifters. That's why it goes quiet after 5 min. There are several different brands of additives on the market that can fix this problem ,unless you have a more serious mechanical problem, which I doubt.Check your local auto parts store for the additive. Just add it to your oil and "wham!" problem solved. Good Luck!

Posted on Jun 16, 2009

  • 8 Answers

SOURCE: CLICKING NOISE IN THE ENGINE AREA

It could be an exhaust leak
It could also be the infamous "Piston Slap" common in 1999-2002's.
GM "standardized" pistons or something like that and they did not fit the cylinders tight enough. The piston "slap" the cylinder walls and make a tapping sound for the first few minutes until the pistons expand to fit. GM would not fix it and says it does not hurt the longevity of the motor ( yeah ri--ght! ) Do a google search for piston slap.
My 02 silverado has done this since almost new... now 145,000.

Posted on Jul 05, 2010

  • 8 Answers

SOURCE: ticking when cold

It could also be the infamous "Piston Slap" common in 1999-2002's.
GM "standardized" pistons or something like that and they did not fit the cylinders tight enough. The pistons "slap" the cylinder walls and make a tapping sound for the first few minutes until the pistons expand to fit. GM would not fix it and says it does not hurt the longevity of the motor ( yeah ri--ght! ) Do a google search for piston slap.
Oil level would help if it is a lifter ticking but will do nothing if it is the pistons slapping the walls. My 02 silverado has been doing this since almost new and the above description is straight from GM and a few visits to the dealership while under warranty.

Posted on Jul 05, 2010

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