Denali just went crazy on me...

[ErVikingo]

Argh, venting here.

Just drove 4 hours to a business meeting, now the truck starting acting up.

Upon starting it, the starter stays engaged, no instruments, powerseats, a/c. Hunting idle, all warning lights on in the dash.

just taken away by roadside assistance. Great.....

40K miles on an 2007 car.

[dd74]

No offense, but why are you driving one of those POS vehicles? I'd sell it and pick up a Toyota-Lexus, or Honda-Acura.

[Zeke]

Originally Posted by dd74

No offense, but why are you driving one of those POS vehicles? I'd sell it and pick up a Toyota-Lexus, or Honda-Acura.

Atta boy. Kick 'em when they're down.

[dd74]

Originally Posted by milt

Atta boy. Kick 'em when they're down.

I see you don't have much in the way of advice either, uncle Milty

[kaisen]

Sounds like a bad battery due to a bad alternator causing low voltage. But you'll find out soon enough.

[Zeke]

Originally Posted by dd74

I see you don't have much in the way of advice either, uncle Milty

Well, actually I do. I have been driving a Chevy truck of one sort or another for 44 years. The current one is an '89 with well over 200K miles. Sure, I've had some repairs and breaks, but in the long run, the General has served me very well.

Cheaper than any Porsche, that's for damn sure.

[BLEW911]

And the good news is.......you had a business meeting to go to.

Don

[McLovin]

Just log into the GM HQ Customer Service website, they'll help you out.

[pwd72s]

ALL cars have problems..My guess? Easy fix...and it won't take long.

[Scott R]

Take this for what it's worth, I was a GM wrench in 1994' so this is dated information... However when we had massive multi-system failures like that It was almost always a shared electrical path at fault.

What you're describing is almost exactly what we had with the Cadillac Atlante's when the rear computer would get wet. The top to rear parcel shelf seal would shift and water would get into the electrical. The digital dash would die, power windows and top would be stuck down...or up, door locks would be stuck locked. It was new computer time after that.

[bell]

The newer gm trucks/cars are nothing like pre-2000 ones........The 2007 gm trucks use data wires to control the ignition/starter/etc, not the typical key cylinders......
is there and aftermarket alarm/remote start on the truck? It is rare but I've seen the aftermarket interface modules you need top use for remote starts fail and cause similar prpoblems......

I'll log into a program I have on my comp in a bit (currently on my bb) and see exactly which data system that truck uses....
But could be anything from a bad "body control module" to a failed key switch.......when the data wire systems fail things turn to **** all at once.....

[nota]

or as simple as a bad ground
esp at the battery post
I hate the no post batterys

[ErVikingo]

Driven/owned Toyota, Lexus, Acura, Infiniti, Chevy, Caddy and GMC. By far my best truck is my Chevy, no headaches, no nonsense, no stupid fees at the dealership.

First thing they've told me its bad is the crank position sensor which is sending the wrong info to the cam timing sensor. The BCM is next suspect. I checked all the breakers (swapped them around) with no solution and checked every single fuse.

I walked to one meeting but if it ain't ready tomorrow will have to rent a car to drive 4 hours home to attend meetings in that area Thu/Fri and then drive back here to pick it up.

Should have driven the SC. Did not do it as I did not wanted to send the wrong message to my clients.....

All in all, OnStar and roadside assistance were a lot of help.

Bell, if you could figure that out, it would be great! Its a 2007 Yukon Denali 6.2lt.

[Scott R]

Originally Posted by bell

The newer gm trucks/cars are nothing like pre-2000 ones........The 2007 gm trucks use data wires to control the ignition/starter/etc, not the typical key cylinders......
is there and aftermarket alarm/remote start on the truck? It is rare but I've seen the aftermarket interface modules you need top use for remote starts fail and cause similar prpoblems......

I'll log into a program I have on my comp in a bit (currently on my bb) and see exactly which data system that truck uses....
But could be anything from a bad "body control module" to a failed key switch.......when the data wire systems fail things turn to **** all at once.....

WOW So I guess I'm not falling back on my wrenching job..... I don't even know what a "data wire" in a vehicle is.

[ErVikingo]

It has remote start from the factory (all options on this one). It's my wife's truck. I drive the Chevy...

[Dottore]

Originally Posted by ErVikingo

Its a 2007 Yukon Denali 6.2lt.

Why? In god's name WHY?

[ErVikingo]

2 kids + 24' enclosed trailer to haul race car......

[Dottore]

Well OK then.......

[ErVikingo]

my race cars get less mpg's

[bell]

Still on my bb......so don't have that info yet....

The following doesn't pertain to the problem in the denali.....

Gm uses their data system, all the new dodges use a can bus data system, ford is the only us mfg who hasn't gone all out with data systems......
90% of all mid-high end us mfg's use transponder key systems too, when adding security systems to these cars there are modules which you connect most all system wires to, then that module connects to the car via 1 or 2 wires and your done. And the ones that don't require specific valued resistors to be used to trigger certain features like door locks and such......without the tech support some of the aftermarket security companies offer there is NO way you could figure some of them out without damaging electronics...

some use flash memory which you need to program from a pc, others use specific modules, which can be a hassle if it's a crossover year as it's easy to grab the wrong module and when it doesn't work you need to start all over........so there's good and bad from the aftermarket standpoint....but it's definately changed drastically over the past 10 years, which is why you NEVER let the rookie kid at best buy touch your car.....