[linneje]

About a 6 months after we bought our Envoy the "Driver Door Ajar" message would occaisionally come on when driving. This would happen two or three times in a row, accompanied by the interior lights coming on (briefly) and a change to Driver 1 (me) when my wife was driving in Driver 2 mode. Just a small nuisance.

But now it does it about 12-15 times in a row before stopping, and about every 4 or 5 of these messages the horn gives a brief little honk. When driving in town this can be quite embarrassing depending on the timing of the honk ("No, I wasn't honking at the pedestrian in the tank top...")

Is this the sending unit in the door? Would that cause the little honk?

 

[the roadie]

How many miles? Those issues are all related to serial data messages coming from the DDM, and the honk might be a security-related confirmation that the DDM just sent a "lock door" message. You might try configuring Driver 1 and 2 to NOT use the horn as the fob lock confirmation, if they are using it now.

The issue could also be just the switch in the door latch assembly that tells the DDM that it's locked. That would explain the display and the lights, but maybe not the honk.

The DDM may be getting flaky with age or water contamination, or it might be flaky, intermittent wires in the middle of good-looking insulation. The driver's door gets the most flexing of this harness hear the hinges. You might pull the boot back and look at and flex the wires to see if any feel funny.

 

[linneje]

I'm at 150000 km. No, we are not using the horn as lock confirmation. I also notice that when I am leaving the vehicle and press the drivers door lock switch, I get the GM "soft ding ding" that tells me the doors will lock once all of the vehicle doors are closed. The same sound occurs with my venture van.

But sometimes for days the double ding sound doesn't occur when I use the switch - and the vehicle doesn't lock automatically when I close my door. But then a few days later, the sound will return and the automatic locking feature will work.

It isn't the lock switch, because even if I don't get the soft ding ding, I can use the switch to force all of the doors to lock immediately (second press of the door lock switch) just as it should.

Could an aftermarket remote start be at fault?

 

[the roadie]

Aftermarket remote starts are VERY suspicious items, depending on the brand. I'm not an audio system specialist, but I could move this thread to that forum if you'd like. I should have asked first, because I think they MUST send data on the bus to bypass the security system. Can you, or have you, ever disconnected it as an experiment? I might have to sign off supporting this issue since it's no longer my specialty. Plenty of other volunteers, though.

 

[linneje]

When we bought the envoy, the remote start didn't work. We didn't want one anyway, so no biggie. Noticed later that our neighbor's remote start would activate the lights on the Envoy (flash a certain number of times to indicate a problem communicating or invalid code- however the neighbor's fob shouldn't be able to activate this). My solution was to disconnect the antennae for the remote start on the windshield. Now the neighbor's fob can't set it off anymore.

But that isn't the same as disconnecting the remote start. It is still wired in and active, just not receiving commands from the fobs. Perhaps I should get some advice on how to actually disconnect the remote start to try to further the diagnosis. If moving this to a different forum would help, that would be fine.

I think it would be best to start by ruling in or out the remote start somehow.

 

[linneje]

Roadie is correct once again.

Problem solved. Even though I suspected the remote start, I took roadie's advice and opened the door to check the door wiring. All seemed OK, but I pushed on the wiring bracket and heard and felt a click. Yes, it was connected, but it must not have completely engaged.

A couple weeks of driving and the problem has absolutely gone away. To think that we have put up with this for about half a year. Good thing I checked as roadie suggested rather than remove the remote start.