Trail_Boss_6.2
Active member
Thanks for the info. Is there a way to tell what version of software is installed?
Pulsar LT
- Thread starter richarderpelding7
- Start date
Trail_Boss_6.2
Active member
Holley sent me a cable to update my Pulsar LT. Unfortunately, the update did not fix my issue. They are now sending me a new unit.
Although a little frustrated with the issue, Holley is doing what they can to correct the issue. (Issue being the Chevy app can't connect to the diagnostics).
Although a little frustrated with the issue, Holley is doing what they can to correct the issue. (Issue being the Chevy app can't connect to the diagnostics).
TexasSAR
Active member
I am having the same issue.
Trail_Boss_6.2
Active member
Latest Update: Replaced unit with no configuration, everything seems to be good, ran it for a few days with no change to configuration.
Only thing to note, I could not turn off the auto stop via button, pressing button did nothing, light stayed illuminated.
Changed the configuration to disable auto stop, this broke the Diagnostic information. Turned off and diagnostic information back.
Disabled the DFM - diagnostic information is there.
In summary
* The unit connected seems to disable the ability to manually turn off auto stop via button
* With auto stop disabled via the Pulsar - diagnostic information on Chevy app does not work
* Disable DFM via Pulsar with Auto Stop (enabled) - diagnostic information is correct.
I will be passing this information along to Holley.
Only thing to note, I could not turn off the auto stop via button, pressing button did nothing, light stayed illuminated.
Changed the configuration to disable auto stop, this broke the Diagnostic information. Turned off and diagnostic information back.
Disabled the DFM - diagnostic information is there.
In summary
* The unit connected seems to disable the ability to manually turn off auto stop via button
* With auto stop disabled via the Pulsar - diagnostic information on Chevy app does not work
* Disable DFM via Pulsar with Auto Stop (enabled) - diagnostic information is correct.
I will be passing this information along to Holley.
TexasSAR
Active member
I talked to them last week about the same issue.
“The Pulsar LT will use the same communication line as the chevy app and OnStar diagnostic scans so it thinks the line is already in use. The App should still be able to detect any actual check engine lights or vehicles issues.”
Trail_Boss_6.2
Active member
Holley has asked me to call to diagnose. I will bet they tell me the same thing as you were told.
My concern to what you were told is, how will it be able to detect vehicle issues if the channel is used by the Pulse LT?
I'll update once i have a conversation with them.
And FYI, lost the diagnostic's information - guess it needed some time to sync properly. (DFM Disabled Only).
My concern to what you were told is, how will it be able to detect vehicle issues if the channel is used by the Pulse LT?
I'll update once i have a conversation with them.
And FYI, lost the diagnostic's information - guess it needed some time to sync properly. (DFM Disabled Only).
Trail_Boss_6.2
Active member
Spoke with Technician, we went over the details of the issue, check to confirm the unit had the latest update via the USB to ODBII cable.
Everything looked good and it was up to date but problem persisted.
UPDATE: After taking the truck for a few trips. The diagnostics works sometimes and now the remote start works as well as the ability to stop the engine.
No only does this keep the app from seeing the diagnostics, it is random if remote start the truck works from the app but it doesn not show it is running and i can't stop it. I was provided the option of keeping it and dealing the the app not functioning the way it is supposed to or sending back.
The tech did mention that GM is going towards a configuration that will keep things like the Pulsar from even working.
After weighing the options,I will be sending back. Note... I have a few days to change my mind.... 
Decided to keep....
Everything looked good and it was up to date but problem persisted.
UPDATE: After taking the truck for a few trips. The diagnostics works sometimes and now the remote start works as well as the ability to stop the engine.
The tech did mention that GM is going towards a configuration that will keep things like the Pulsar from even working.
After weighing the options,
Decided to keep....
Last edited:
Trail_Boss_6.2
Active member
Not silly at all.
The configuration is in the unit itself, so it does not change anything on the ECM itself - so when you remove it, you are removing the configuration changes.
In short, when you remove the unit, the truck is back to stock settings.
Hope this answered your question.
The configuration is in the unit itself, so it does not change anything on the ECM itself - so when you remove it, you are removing the configuration changes.
In short, when you remove the unit, the truck is back to stock settings.
Hope this answered your question.
Trail_Boss_6.2
Active member
Sure thing. A few notes on using the Pulsar LT.
Disconnect battery before removing / installing Pulsar. You can cause a check engine condition if you leave the battery connected (ECM Lost communication code).
After changing an option and saving the change, you have to hold the cruise control cancel button again to get into programming mode to select the function you want.
With the Pulsar installed, engine running and your cruise control is off. The + - for the cruise control will change the throttle response and the speedometer will change to denote the setting. This can be changes while driving down the road.
I have the 6.2l and unknowingly change the setting to 5 (most responsive). Way to touchy, was breaking tires loose at every stop light.
Put it back to "0" which I am assuming is stock (Better gas mileage).
Good luck with the Pulsar...
Disconnect battery before removing / installing Pulsar. You can cause a check engine condition if you leave the battery connected (ECM Lost communication code).
After changing an option and saving the change, you have to hold the cruise control cancel button again to get into programming mode to select the function you want.
With the Pulsar installed, engine running and your cruise control is off. The + - for the cruise control will change the throttle response and the speedometer will change to denote the setting. This can be changes while driving down the road.
I have the 6.2l and unknowingly change the setting to 5 (most responsive). Way to touchy, was breaking tires loose at every stop light.
Put it back to "0" which I am assuming is stock (Better gas mileage).
Good luck with the Pulsar...
Trail_Boss_6.2
Active member
Hoping it will still detect any actual check engine lights or vehicles issues. I may have to test this out when I re-install my catch can.
Trail_Boss_6.2
Active member
Wanted to provide latest update.
After making 4-5 trips in the truck, the app is working fine.
Remote Start - will start and stop
Diagnostics - shows all information (No Issues Found).
This is very strange and makes me wonder if this is something Chevy (GM) app vs. an issue with the Pulsar.
We will probably never know. Good luck to all who have.
After making 4-5 trips in the truck, the app is working fine.
Remote Start - will start and stop
Diagnostics - shows all information (No Issues Found).
This is very strange and makes me wonder if this is something Chevy (GM) app vs. an issue with the Pulsar.
We will probably never know. Good luck to all who have.
TexasSAR
Active member
Question for fellow Pulsar LT users
Are you taking the Pulsar LT off when you go to the dealer for oil change?
