Factory remote starter

[vincetaco1]

I have a 2014 Yukon SLT. The remote starter has worked without issues until recently. The only issue currently is that I cannot extend the run time to the full 20 minutes. I can start it again remotely once the first 10 minutes runs out but when I do the sequence to extend the runtime to 20 minutes the lights flash as normal but doesn't extend the time. Any info will be greatly appreciated.

 

[mikez71]

What is the sequence?
I never knew you could extend it, thought you would just start a new cycle.

btdieselworks autosync supposed to let it run 1x20 min cycle..
Have not found ECM setting mentioned below...

 

[Joseph Garcia]

Watching this, as a 20 minute idle would eliminate the need for me to install an oil heater in my oil pan.

 

[Charlie207]

Yeah, I didn't realize you could extend the period without external programing.

Joseph, I've only had one instance where an oil pan heater would have been helpful here in NH.

 

[Joseph Garcia]

Yeah, I didn't realize you could extend the period without external programing.

Joseph, I've only had one instance where an oil pan heater would have been helpful here in NH.

Charlie, you're not pushing close to 80 psi with cold oil in the summer. The winter is going to slow that oil warmup process.

 

[vincetaco1]

What is the sequence?
I never knew you could extend it, thought you would just start a new cycle.

btdieselworks autosync supposed to let it run 1x20 min cycle..
Have not found ECM setting mentioned below...

View attachment 471141

Sequence as in hit lock button then hit starter button until lights flash. I've had this vehicle for 5 yrs and this is the first time I've had this issue.

 

[mikez71]

It looks like the RCDLR and the BCM are the two computer modules listed, no mention of ECM directly in the loop..

You should change your remote batteries if you haven't tried that, because they can lose signal and that maybe getting it out of sync.
Maybe it doesn't think it's the second button press after resyncing.. since you're only allowed to press twice.

From charm.li
---------------------

The keyless entry system has the following components:

* Keyless entry transmitters
* Keyless entry antenna, if equipped
* BCM
* RCDLR

...

Once activated, the engine is allowed to run for 10 minutes. The RVS time may be extended by an additional 10 minutes by again pressing and releasing the lock button and then pressing and holding the RVS buttons on the transmitter. This feature is called a RVS continue and allows a maximum of 20 minutes of engine running. If the RVS continue is performed at 7 minutes into the initial 10 minute time-out, a total of 17 minutes of engine running would occur. The RVS event may be suspended at any time by pressing only the RVS button on the transmitter or by entering the vehicle and turning ON the hazard lamps.

In between ignition cycles, only 2 RVS events may occur or be attempted. Once 2 events or attempts have been made, future RVS events will be suspended until the vehicle is started using the ignition.

...

 

[vincetaco1]

It looks like the RCDLR and the BCM are the two computer modules listed, no mention of ECM directly in the loop..

You should change your remote batteries if you haven't tried that, because they can lose signal and that maybe getting it out of sync.
Maybe it doesn't think it's the second button press after resyncing.. since you're only allowed to press twice.

From charm.li
---------------------

The keyless entry system has the following components:

* Keyless entry transmitters
* Keyless entry antenna, if equipped
* BCM
* RCDLR

...

Once activated, the engine is allowed to run for 10 minutes. The RVS time may be extended by an additional 10 minutes by again pressing and releasing the lock button and then pressing and holding the RVS buttons on the transmitter. This feature is called a RVS continue and allows a maximum of 20 minutes of engine running. If the RVS continue is performed at 7 minutes into the initial 10 minute time-out, a total of 17 minutes of engine running would occur. The RVS event may be suspended at any time by pressing only the RVS button on the transmitter or by entering the vehicle and turning ON the hazard lamps.

In between ignition cycles, only 2 RVS events may occur or be attempted. Once 2 events or attempts have been made, future RVS events will be suspended until the vehicle is started using the ignition.

...

Yes exactly, just like in the manual. I haven't been able to find any information anywhere why it wouldn't extend the time. I'm stumped.

 

[mikez71]

BCM must have the timer and can shut engine off, but RCDLR receives and interprets your remote code.
I wouldn't worry yet, until you try new remote batteries.

 

[kbuskill]

I would be curious if you have a pending code or something. The remote start won't work if you have a check engine light on. I wonder if while it is running the first 10 mins the ECM has a pending code stored that somehow gets reset when started with the key but wouldn't allow for the second start.

Also, any open door, hood, lift gate, or back window also won't allow remote start. Maybe you have an intermittent problem with one of those switches.

Just thinking out loud.

 

[vincetaco1]

I would be curious if you have a pending code or something. The remote start won't work if you have a check engine light on. I wonder if while it is running the first 10 mins the ECM has a pending code stored that somehow gets reset when started with the key but wouldn't allow for the second start.

Also, any open door, hood, lift gate, or back window also won't allow remote start. Maybe you have an intermittent problem with one of those switches.

Just thinking out loud

Hmm. I'll check today for any codes. I didn't think of that.

 

[vincetaco1]

Well, no codes at all, nothing pending. I even remote started while sitting in it and did the extend process and it still only ran 10 mins.

 

[Charlie207]

Charlie, you're not pushing close to 80 psi with cold oil in the summer. The winter is going to slow that oil warmup process.

Remind my why your oil pressure is so high?

Are you still running 5W-30, or switching to 0W-30 to help with the cold-weather/cold-starts?

 

[mikez71]

So you already changed remote battery?

Well, no codes at all, nothing pending. I even remote started while sitting in it and did the extend process and it still only ran 10 mins.

 

[Joseph Garcia]

Remind my why your oil pressure is so high?

Are you still running 5W-30, or switching to 0W-30 to help with the cold-weather/cold-starts?

Wanted additional protection for the 165,000 mile bearings, with their wear-increased clearances, with the supercharger addition.

Not currently planning and oil viscosity changes, but not ruling it out, either.

 

[Charlie207]

Wanted additional protection for the 165,000 mile bearings, with their wear-increased clearances, with the supercharger addition.

Not currently planning and oil viscosity changes, but not ruling it out, either.

What I meant was, how did you get your pressure up to 80psi?

When my 154k engine was mic'd by the machine shop they said the 2008 LY6 main & con-rod bearings still had the factory coatings/hatching on them. He'd never seen an LS wear out from old age; it was from lack of maintenance.

 

[Joseph Garcia]

What I meant was, how did you get your pressure up to 80psi?

When my 154k engine was mic'd by the machine shop they said the 2008 LY6 main & con-rod bearings still had the factory coatings/hatching on them. He'd never seen an LS wear out from old age; it was from lack of maintenance.

As stated in my Signature content ==>> Melling 10355 high volume oil pump with +10 psi spring; Secondary oil pressure relief valve delete.

The secondary oil pressure relief valve delete probably contributed most to the 60+ psi oil pressure delivered to the bearings on cold starts, since a properly operating relief valve should limit the oil pressure to 60 psi max. This would have been good, but these valves are located inside the oil pan, and I did not want to have to drop the oil pan to replace that valve again. These valves are only needed for the AFM motors, and while my L92 motor did not use AFM, my oil pan was not original, and it contained this valve, which had failed.

Since I purchased my new-to-me truck at 125,000 miles, I could not guarantee how the previous owner treated the truck.

 

[vincetaco1]

So you already changed remote battery?

No. I'll pick one up tomorrow. Do you think a fob battery is the issue?

 

[swathdiver]

Well, no codes at all, nothing pending. I even remote started while sitting in it and did the extend process and it still only ran 10 mins.

You checked the BCM and RCDLR for codes too?

 

[mikez71]

No. I'll pick one up tomorrow. Do you think a fob battery is the issue?

I do. But I won't feel bad if I'm wrong because it's the easiest and fastest thing you could try.