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Allen Donal
Allen Donal Posted on Feb 19, 2017
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I have a 04 gmc envoy xuv unknown driver message no security light will not start battery was bad got new one tryed passlock reset stills say unknown driver no start

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Jeff Armer

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  • GMC Master 15,575 Answers
  • Posted on Feb 19, 2017
Jeff Armer
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It's a short in the instrument cluster.
I had the same problem with my 2004 XUV.
It started in early December of 2007.
Intermittent manifestations, than more persistent.
Took it to the GMC Dealer --
Of course, the Truck wouldn't do it's tricks for the Tech.
They replaced the ignition switch and sent me home.
It got progressively worse.
I waited until I was sure it would do it for the tech.
Took it back in to GMC Dealer--
It's a short in the instrument cluster.
They needed to replace the entire cluster.
I bought an extended warranty when I bought the truck.
The warranty is still in effect --
So I only had to pay the $100 deductible.
No Idea what it might cost otherwise.

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2004 gmc envoy xuv 6cyl. Automatic wont start?
Pull a coil pack and check for spark while turning it over- if you have spark, your crank sensor should be good. Pull a connector off one of the fuel injectors and insert a noid light in the end. the light should flash while turning over If the light doesn't flash, the problem could be the security system "passlock" (key on engine off- if you have a car/lock light on the dash that stays on for more than a few seconds the passlock is active and disabling fuel) The problem could also be a bad cam sensor. any and all wiring between the BCM, ECM and all other components on the engine could also be suspect- shooting in the dark without those codes sry.
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https://www.google.com/search?q=2004+gmc+envoy+security+reset

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