Question about 2003 Chevrolet Silverado 2500HD

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Check engine light flashing at 65 mph 2003 silverado 200HD

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

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

66 chrgr
  • 1011 Answers

SOURCE: chevy silverado 1500 engine light come on at 65

Autozone will check the codes for free .Itsounds like a secondary ignition problem possible plug wires :)

Posted on Aug 23, 2009

  • 1 Answer

SOURCE: 2003 chevy silverado 1500 check engine light on

2003 chevy silverado
A picture of a engine is on the dashbroad, what can I do to get it off.
Rita

Posted on Oct 07, 2009

  • 101 Answers

SOURCE: after running 70-75 mph for for 2-3 min service

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 "

  • 170 Answers

SOURCE: 2003 suburban vibration at 65 to 70 mph

could be a worn universal joint on the driveshaft

Posted on Jan 08, 2010

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Chevrolet Trucks, Vans and SUVs of your vintage are famous for faulty hub bearings
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http://www.automotive.com/2003/49/chevrolet/silverado/recalls/16176.html

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After running 70-75 mph for for 2-3 min service engine light starts flashing but goes right back off when speed is reduced to under 60-65 mph


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

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Autozone will check the codes for free .Itsounds like a secondary ignition problem possible plug wires :)

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