Question about 2008 GMC Sierra 1500

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Where is the ecm ground on a 2008 gmc sierra

While driving the truck will completely shut off and battery light will come on. I let it sit for a couple minutes then the truck will restart but the battery light will stay on. If I disconnect the battery for 10 minutes or so the battery light will shut off but I seem to be getting resistence when I accelerate. This happened about three different times in one night.

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  • GMC Master
  • 3,679 Answers

Have you had the battery checked for holding charge ?have the alternator checked for charge rate if battery is good , you mention happening at night when using lights which will put a drain on a faulty battery/alternator more so than during day

Posted on Apr 22, 2014

Testimonial: "I HAVE, REPLACED THE BATTERY AND THEN WENT TO AUTOZONE AND HAD ALTERNATOR TESTED ALSO. NOTHING WRONG WITH EITHER."

  • steve Apr 22, 2014

    i have had a similar problem and i replaced the igntion coil packs , have you had the OBD codes read as they should (help) identify the exact problem

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Posted on Jan 02, 2017

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SOURCE: 1998 GMC Sierra radio and display stays on all the time

First of all...does your truck have the retained accessory power (RAP)? If it does, the radio would always stay on with the key off until you open the drivers door. If it does have RAP and the door pin on the drivers door has went bad, then the truck doesn't know that you opened the door and continues to allow accessory power (although it would still cut off after about 20 minutes). If the interior lights come on when you open the door, then the pin is ok. If the lights come on, it could be the RAP relay. If it has gone bad, it is possible it is stuck supplying power and needs replacing. The relay should be labeled in the fuse panel, and there should be other relays in the panel with the same part number. You can swap a relay for the RAP relay and see if it fixes the problem...if it does fix it swap the relays back and replace the RAP relay. If the truck doesn't have RAP then it is possible the problem is in the radio..if you have a friend with a GM car or truck close to the same year you could swap radios and see if that fixes your problem...should be pretty simple. pull the cover off the dash, it just clips on, take out a couple screws that hold in the radio, unplug it and plug in the other radio. sorry so long winded...hope this helps you somewhat.

Posted on Mar 13, 2009

  • 321 Answers

SOURCE: 2002 gmc sierra truck won't start replaced filter

Both vehicles?I would suspect bad fuel,water contaminated possibly?

Posted on Jul 10, 2008

  • 74 Answers

SOURCE: 1999 gmc 1500 sierra truck v8

The clutch in compressor is controlled by a pressure switch. Start there.

Posted on Jun 25, 2008

  • 77 Answers

SOURCE: 2005 gmc sierra duramax diesel is giving us

may check or have the dealer check for a crack in the housing for the fuel filter have seen it a few times specifically in heat cause every thing expands more it will start sucking air and lose pressure

Posted on Jul 25, 2010

  • 14036 Answers

SOURCE: 2003 GMC Sierra 5.3L (has

CODE PO120 - TP SENSOR 1 SIGNAL RANGE PERFORMANCE. CODE P1516 - TAC MODULE THROTTLE ACTUATOR POSITION PERFORMANCE. CODE P2135 - THROTTLE POSITION SENSOR 1 - 2 CORRELATION ERROR. THIS IS A DEALERSHIP FIX YOU HAVE PROBLEMS OR FAULTS IN THE THROTTLE POSITION SENSOR.

Posted on Oct 24, 2010

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