Question about 2003 Chevrolet Silverado 1500

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Check engine light on 2003 silverado - 2003 Chevrolet Silverado 1500

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Posted on Jan 02, 2017

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SOURCE: 2003 Silverado rough idle, idles good after "check engine" light

Check your o2 sensor voltage, those trucks are real bad for o2 sensors, and yes if one sensor is reading 0mv, the others will start to drop out, and the vehicle will run very, rough. You also may check fuel system pressure, should be almost 60p.s.i. If its alot lower, Id be looking into a fuel pump. If that vehicle is drive-by-wire (no throttle cable), the throttle bodies get very dirty and cause that concern also. Id start by having the vehicle scantested.

Posted on Feb 07, 2009

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SOURCE: 2003 chevy silverado 1500 check engine light on

You will need to have a scanner connected to the car's computer diagnostics to get the exact error and determine the part of the engine where the problem may be located.

Posted on Oct 01, 2009

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I have a 2003 Chevy Silverado 4.3 Vortec, while the engine is under a load the check engine light will begin to flash and the truck will run rough for a very short period of time and also if it stores


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1 Answer

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Feb 13, 2011 | 2003 Chevrolet Silverado 1500

1 Answer

My father has a 2003 chevrolet silverado and the light of reduced engine power just went on, why and what should i do?


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Jan 27, 2011 | 2003 Chevrolet Silverado 1500

1 Answer

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2 Answers

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Oct 01, 2009 | 2003 Chevrolet Silverado 1500

2 Answers

2003 Silverado rough idle, idles good after "check engine" light


Check your o2 sensor voltage, those trucks are real bad for o2 sensors, and yes if one sensor is reading 0mv, the others will start to drop out, and the vehicle will run very, rough. You also may check fuel system pressure, should be almost 60p.s.i. If its alot lower, Id be looking into a fuel pump. If that vehicle is drive-by-wire (no throttle cable), the throttle bodies get very dirty and cause that concern also. Id start by having the vehicle scantested.

Feb 02, 2009 | 2003 Chevrolet Silverado Ss

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