Question about 2007 GMC Envoy Denali

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Codes 1682 and 2176 in my gmc envoy denali won't start runs hard

Yesterday my suv would not start when turning the key over I would have to restart then it would fire no problem ran fine. no lights nothing. today it would not start restarted nothing restarted finally then ran crappy would not go over 30 mph. the engine lights were on at that point took it in to a shop that was open and the guy pulled the codes 1682 and 2176 but told me he was not able to fix my vehicle due to lack of knowledge on such a complex computer system. had vehicle towed to another shop. just concerned I don't know anything about the shop it is now at and would like to have some idea of what could be wrong now. Thank you for your time. and you help.

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  • tgross0773 May 31, 2009

    Thank you both... I will call the dealer... I did change the battery today because it was bulging on the side... No help though... Very sad I love my cute SUV... Hope it does not kill me at the shop to fix... :(

  • tgross0773 Jun 01, 2009

    Dealership fixed my envoy by replacing the ignition switch and I replaced the battery... Thank you for your help and suggestions...

  • geraldo14200
    geraldo14200 May 11, 2010

    is that all the shop's code reader gave you was 1682 and 2176 no letters with that code? like po1682 etc. ?

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  • 253 Answers

The p1682 code is an ignition 1 control circuit code. The p2176 is related to the throttle body. There is a bulletin fron GM on the wiring being rubbed through on the front drive shaft. Have the shop check there first. The first code sounds like a voltage issue, possible ignition switch. Both may be covered under the 100,000 power train warranty. You should call your dealer first to see. Good Luck

Posted on May 31, 2009

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yesterday my suv would not start when turning the key over I would have to restart then it would fire no problem ran fine. no lights nothing. today it would not start restarted nothing restarted finally then ran crappy would not go over 30 mph. the engine lights were on at that point took it in to a shop that was open and the guy pulled the codes 1682 and 2176 but told me he was not able to fix my vehicle due to lack of knowledge on such a complex computer system. had vehicle towed to another shop. just concerned I don't know anything about the shop it is now at and would like to have some idea of what could be wrong now. Thank you for your time. and you help.
  1. noavatar.png
    • tgross0773
    • 1 year ago
    Thank you both... I will call the dealer... I did change the battery today because it was bulging on the side... No help though... Very sad I love my cute SUV... Hope it does not kill me at the shop to fix... :(
  1. noavatar.png
    • tgross0773
    • 1 year ago
    Dealership fixed my envoy by replacing the ignition switch and I replaced the battery... Thank you for your help and suggestions...

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