Question about 2003 Chevrolet Silverado 2500HD
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Posted on Jan 02, 2017
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
a flashing check engine light means a misfire, you should go to one of your local parts stores and have them read your code. your code will tell you which cylinder was misfiring and if there are any other codes that may also be related to your problem. but it could need anything from a fuel filter to a catalytic conveter or just a tune-up, getting those codes could greatly narrow it down
Posted on Nov 27, 2009
Testimonial: "i have a random cylinder missfire in #1 & #5 so i'm replacing coil pack's to try to eliminate "
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