Question about Chevrolet TrailBlazer

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The other night the headlights dimmed and the air pressure blowing out the vents dropped in pressure. This lasted for aprox 20-30 seconds then went back to normal. Well today I pulled in to get a soda

Vehicle is running rough and started after I had shut it off for aprox 10 minutes to run inside the store and grab a soda. No check engine lights have came on.

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  • Chevrolet Master
  • 21,873 Answers

The dimming lights and fan speed sounds like a loss of power from the alternator, but could also have been a drop in engine speed.
You might want to have the computer checked for trouble codes even tho the warning light did not come on.
It could also be the alternator is failing.

Posted on Jan 21, 2013

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Posted on Jan 02, 2017

SOURCE: 1999 pontiac grand prix . will not run

If wiggling the wires cured the code, then one of the wires is broken inside the insulation. Pull on each wire one at a time. look for the colored insulation to stretch, this will be the broken wire. For the other car that wont rev up, this is a common when the catalytic concverter is plugged up. This will also cause MAF codes, and in turn, TRAC OFF light.
See http://www.greatautohelp.com

Posted on Oct 17, 2008

  • 92 Answers

SOURCE: 1999 Pontiac Grand Prix intermittent problem runs rough

i have had two of these problems both on grand prix's , both turned out to be a mass air flow meter. but nethier set a code for the sensor.

Posted on Mar 29, 2009

  • 66 Answers

SOURCE: rough running engine at temp

0340 is camshaft position sensor and the other 0325 is the knock sensor. Chances are you need to replace the sensors and good to go.

Posted on May 05, 2009

  • 496 Answers

SOURCE: 2001 chevy impala

Hi,
You might get some gas treatment for your tank. Sometimes bad gas can cause those symptoms.
I would put the treatment in and let it sit overnight. Hopefully the next morning the car will feel better!
I hope this helps... Good luck!

Posted on Sep 24, 2009

  • 133 Answers

SOURCE: Headlights both went out last night. High beams

There is a relay that controls the headlights, volvo calls it a step relay. You will have to check that power is getting to this relay. If not, check all fuses and wiring. If power supply checks out ok, you may have to replace the relay. Let me know if you need any more info or a wiring diagram.

Posted on Apr 06, 2010

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