Question about 2003 Chevrolet Silverado 1500

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02 silverado 2500 idleing problem

Hello i have a 02 2500 hd silverado when you first start it in the morning the idle jumps from normal then down back up to normal then down when it warmes out it it fine their are no check engine lights but i know it is a sensor but which one

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  • beowulf69 Feb 03, 2009

    also have a 2003 silverado 4x4 4.9l "v" engine. I currently have 2 codes 171 bank 1 runs too lean & 174 bank 2 runs too lean. my tech says it's the intake manifold? does this make sense?

  • beowulf69 May 11, 2010

    ANy one can try to change parts thats why dealers out there rob the hell out of you! go back to mechanic school!

  • kevin carpenter May 11, 2010

    how many miles do you have on this vech?

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Try changing the coolant temp sensor

Posted on Feb 05, 2009

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