LLY prone to electrical issues?

[battlegraduate09]

Just going off my own personal experience, it seems the LLY engine and 2004.5-2005 trucks have more electrical issues than any other 01-07 Duramax I have worked on. Has anybody else noticed this or ran into this consensus ? Was there something changed drastically in the gm trucks in 2005?

Again, this is just my curiosity, I'm not declaring this statement as fact. But I work on quite a few Duramax trucks and it's been everything from chasing class 2 data line interruptions (found in the driver module in the gauge cluster and power seat harness, hvac problems with head itself going out, the blower motor resistor shorting out, seat heater element short circuited and caught the seat on fire, 6 disc Bose radios crapped out( ok that ones common across the board) and air bag lights, holy crap every LLY I work on has an airbag light on it seems. 2003 Duramax had 2 front Impact sensors and I bet hitting a car head on wouldn't give the airbag issues iv chased on these trucks . I know there's been other issues but I'll cut it short.

I just want to hear some others opinions. And yes I worked on one today... Thanks for letting me rant about it

 

[Lparrill]

I have experience with 3 LLYs and haven't had any electrical issues. One has 250k and I put the last 150k on it. The other is my built motor truck with 140k on the chassis and the other is a bone stock 05 with 80k.

 

[02greysixer]

My lly has an airbag light/message. Mine is either front airbag sensor or sensor wiring. Haven't looked into it much. Tried an aftermarket sensor but numbers were different. Need the o.e. g.m. one but too cheap to spend that much. Also had a crank sensor go haywire. Random but it was just sensor failure. I also have a passenger side brake light signal light randomly not working. And there may or may not be a trailer light issue on the truck side.

So you could say mine has some gremlins. It's a good truck though.

There's been a few oddball llys come into work too

 

[onebaddmaxxx]

There all the same to me. Iv fixed blower resistors in every year. I usually cut the zip tie holding the ficm harness down if i work on regardless to prevent any issues later down the road. Iv only ever had to ice pick one truck. my lb7 was way worse than my lly. When cranking, it would drop power to the obd port so could monitor rail psi while cranking. The airbag light was on it it too. But it was a latch code and needed a new module.

 

[SteveLBZ06]

We have an lly lbz and lmm at work and knock on Wood the lly is the only one with electrical issues. Coincidentally, or not, it's the oldest and hardest worked by far. It's been thru multiple blower motors, resistors, window switches, 2/7 injector pigtails replaced, most gauges don't work, dash lights and dimmer seen to have a mind of their own, driver speaker doesn't work. That's all I can think of now but it's reliably pulled trailers and pushed snow for 200k miles:thumb:

 

[duratothemax]

Theres nothing in an LLY that would make them more prone to electrical problems than any other 2003-2007 GMT-800.....

Save for the injector harness. Everything else is the same between all of the trucks.

231k on my truck, never had any electrical "gremlins" that I had to chase.

 

[battlegraduate09]

Thanks for the replies, this thread was just for my curiosity. I have no reason to think that they are more prone for issues, or proof of that. Maybe theres just a bunch around here and thats usually what i work on. My old LLY had its fair share as well though, but it was a great running truck like somebody said above. I loved it.

Thanks for the responses and opinions.