2003 gmc denali awd

[charliestrans]

hello guys i have a 2003 gmc denali awd im having problems starting it was driving down the road and just shut off on me since then have not been able to start it none of my dash lights work and the fuel pump has no power any info plz let me now

 

[07Burb]

Have you checked the battery and/or alternator?

 

[charliestrans]

battery is good and alternator is good

 

[07Burb]

Makes me wonder if a fuse blew then. Do your dome lights come on or anything else electrical??

 

[JochenWoern]

battery is good and alternator is good

What about the battery/alternator cables? All connections good?

I had a problem once on a '99 Tahoe where the cable harness needed to be replaced.

 

[OHSIXX]

Do these have issues with the ignition switches as well like the trailblazer/envoy platforms do?? When I had my Envoy I read alot about ignition switch failures causing all kinds of weird electrical issues...I know they are easy to replace and can be picked up at your standard parts store...FYI

 

[DenaliAK]

Yeah, definitely sounds like something whacky with the electrical/battery/alternator if you're not getting fuel pump or dash lights at all.

Headlights, dome lights, radio...does anything work?

 

[charliestrans]

battery cables alernator cables all good switched out ignition module and switch i get nothing just turn over and dome lights work

 

[big_b_in_PA]

Check all fuses relays ect. Sounds like the ECM is not getting juice. I had that problem with a car I once had, it took me a couple hours to figure it out.

 

[charliestrans]

ok update well truck still wont start now i have a theft code and a u1000 code class 2 data link malfunction. alot ppl have said and told me a (pass lock sensor) or the cluster could be bad to i dont know what to do anymore any would be apprciated

 

[Rivieraracing]

Do you have an aftermarket alarm installed on your truck? Sounds like you may have to take it to a dealer, should be pretty easy for them to figure out since it won't start and it's not an intermittent problem!

 

[charliestrans]

well all factory alarm i guess of to the dealership i go

 

[Rivieraracing]

Sorry man, I love being able to fix most everything myself, but from what you describe is going on, I would be looking towards the dealership if I was in your situation!! Good luck with it all and please report back with your findings!!

 

[charliestrans]

so far at the dealersgip all day no findings yet but they say possible dash problem and computer promblem

 

[Rwayne]

so far at the dealersgip all day no findings yet but they say possible dash problem and computer promblem

Curious to how this turns out.. I just got the code when using my hypertech programmer. Need a reliable site for the dtc code U100

 

[LuSe4]

Curious to how this turns out.. I just got the code when using my hypertech programmer. Need a reliable site for the dtc code U100

This was from last December FYI.

 

[Rwayne]

Seen that. Usually and hopefully it's fixed now. And that person my have a little bit of knowledge on the subject. I searched on the forum and this is the thread that popped up.