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Chevy Silverado and GMC Sierra Electrical and Computer Questions

352 messages,  Last post on Nov 23, 2009 at 8:26 AM

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What is this discussion about? Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Truck

#345 of 352 Re: 01 CHEV.1500 SERVICE ENGINE LIGHT [shaneo] by denham Oct 26, 2009 (8:15 am)
Replying to: shaneo (Oct 16, 2009 8:53 pm) Yes undo the battery will clear the code and the light will go out, but not fix the problem. The gas tank must build up pressure and most often it is the gas cap weak from use and you get the check engine light. This was my problem and I would say that anyone who has check engine light what any type auto they should first replace the gas cap as it could very well be the problem at little cost. Dennis
#346 of 352 turn signal issue by ahuff12 Oct 26, 2009 (2:27 pm)
03 1500 silverado..left turn signal will stop blinking when i put foot on brake pedal
#347 of 352 1999 gmc sierra by ray102 Nov 06, 2009 (9:00 pm)
my gadges go up and down and my batt. light comes on for a couple second and the gadges go crazy, rpm,speedomoder, oil,water temp, alt gadges go crazy and then quit working. does any body knows the problem please let me know. I change the alt. still not working. ray.
#348 of 352 Simple fix by azjas Nov 06, 2009 (10:33 pm)
It is the ignition harness causing you all the problems. Replace it -
#349 of 352 Electrical problem by silveradoz71 Nov 14, 2009 (10:02 pm)
#350 of 352 Electrical problem by silveradoz71 Nov 14, 2009 (10:02 pm)
We just bought a 2003 Silverado 1500 Z71, today we were leaving a store and all the lights on the instrument panel lit up (all of them at the same time) and the headlights dimmed for a second, then everthing was fine, went to another store and when I shut off the truck the electric door locks did not unlock, so I tried to start the truck and it was dead, nothing would come on, after a few attempts to start it, it just suddenly started, so we decided to go straight home, a few seconds after we pulled out the lights all came on again, Ive tried starting it a few times since with no problem, has anyone had a similar problem or any suggestions for me? i dont want to be left stranded somewhere.
#351 of 352 Re: Fuel Gauge/Fuel Pump/Electrical problem? [huff94] by tcbusa Nov 20, 2009 (6:56 am)
Replying to: huff94 (Aug 14, 2006 4:26 pm) huff, I had this problem with my 99' silverado 4.8,i replaced the fuel press. regulater & solved the problem.Got the part napa 84$,hope this is it.do it yourself job. tcbusa
#352 of 352 2003 Z71 self created electical problems by mark2003z71 Nov 23, 2009 (8:26 am)
Short story long, I had to jump my truck in the dark and like a big idiot I crossed the cables on the battery for about 30 seconds. Noticed the black cable on the positive post glowing. Quckly switched them and the truck started ok and made it home. I know, very stupid. Since then I have been getting a rough idle at stop signs where it feels like it might stall and the battery gage begins jumping from about 11 to 16 or so and it normally sits right at 14. I am also getting behavior where the radio will change stations or jump to new cd tracks if I hit one of the seat location buttons in the drivers side door and back to the original when I hit the other. The seat changes position to the correct position like normal. I have also had the radio turn off and reset itself back to 12:00. I have checked all of the fuses that I could find in the dash and in the box by the battery and they all seem good. Any thoughts on what I might have fried and how I can fix this?

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