Question about 2001 Chevrolet Silverado

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I have no power or anything on my diagnostic connector in my 2001 chevy silverado 1500 my engine light is on and i went and bought a scan tool and plugged it in and there is nothing

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I had the same issue with my 2001 Silverado 1500 and found that the cigarette lighter fuse (labeled "cigar" in the fuse bank under the hood) was the culprit. Replace this and you should be good to go.

Posted on Nov 12, 2011

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Most of the time it is the computer if there is no communication,make sure the code reader is turned on.

Posted on May 12, 2010

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2004 chevy Silverado 1500 4.8 ltr. Seems likes its stuck in 3rd. Happened on my way to work. Check engine light was on and went out and I noticed the speedometer quit working and the brake and abs light...


VSS - vehicle speed sensor maybe . Take an have it checked for DTC'S - diagnostic trouble codes . Not auto zone or advance . Need professional scan tool to check all the modules on the vehicle . insturment cluster , BCM , etc.... The computer needs VSS input for the transmission to shift right .

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My 2001 chevy silverado 2500HD 8.1overheated and went into safe mode, how do I reset the codes?


The best way is with a scan tool, but you can disconnect the negative battery cable For a few minutes ! Do you have a check engine light on ? Even if you clear the codes the light will come back on if there is still a problem !

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Chevy diesal wont start fuel pressure is good


Make sure no check engine light. If light on run diagnostic prior to testing. If no check eng. light and no start when cold, could be bad glow plugs, Take test light from positive side of battery to each glow plug post (unplug from harness before testing) if test light lights plug good . if plugs good check pump mounted driver (scan tool required) if P.M.D. good run test for optical sensor in injector pump (scan tool required). Known failure points. I am working on assumption fuel pressure tested between lift pump and injector pump. Look for white smoke when cranking, if present fuel entering cylinders. I can't offer anymore help without further info. Hope this helps.

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I've seen lots of problems with brake switches on these style pickups. Usually they stick on. That also prevents you from being able to set your cruise control, because the engine computer sees that the brakes are on, when they're really not. If you have access to a scan tool that can read codes and data, there should be a Diagnostic Trouble Code stored in the engine computer related to the brake switch. You can also verify by looking at data in the scan tool that the switch is actually staying "applied", when it really should be "released".
If you don't have a scan tool, reach under the dash by the top of the brake pedal and unplug the brake switch. If your brake lights turn off (ignition key has to be on for brake lights to work), then you've found your problem.

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My check engine light soon came on. What does this mean? I have a 2001 chevy silerado 1500.


HI. This will require you to have the engine CPU scanned for trouble code's. This can only be administered with the assistance of a diagnostic computer scan tool. You can purchase this tool at your local auto parts store, or you can just have the scan ran at your local auto zone parts store, free of charge. Once the diagnostic scan is administered, you will be able to isolate the issues that have caused the check engine light to illuminate.

This scan tool will display a print out code and the location of the issue, on the engine, as well. There are Many issues that will cause the engine light to illuminate, but the most common cause will be a failed monitoring sensor, or sensor harness failure(separated power wire, or ground).

Once you have the codes, kindly return to the site, and post them here. We will be able to assist with more accuracy, once the codes are posted.

Thanks..

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Hi. the recommended action is to use a diagnostic CPU. Once attached to the in-car port under the dash, you can use this CPU to clear, and reset the DTC. There is another way, as well. You can , simply, pull the negative battery cable for 5 to 10 minutes. This will force the DTC to be cleared, thus, causing the light to shut down for a short time.

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1 Answer

No power at the obdc for 2006 silverado 1500


I checked the manual, and there is no listing of a fuse for the OBDII connector port, but I think at one time I found a blown cigarette lighter fuse also powered the diagnostic port. Unfortunately, I believe that was a Ford, so it probably won't help, but is worth checking.
Next thing to check is the scan tool you are using. Look up the manufacturer of the scan tool to make sure it is compatible with your 06 chevy. I have heard of problems accessing GM diagnostic ports with a number of scanners. You may have to try a different code scanner, or bring it to a GM dealer. Let me know how you make out.

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The data link connector is a dedicated diagnostic scan tool connector. It is located in the engine compartment against the fire wall. It links the engine controller to the Diagnostic Readout Box (DRBII) scan tool or the Mopar Diagnostic System (MDS), or any other Chrysler-compatible diagnostic scan tool.

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