Cruise turning off by itself
- Thread starter nbenjamin
- Start date
Do you have a SES light on? Or intermittently flashing? Many drivetrain (engine and tranny) codes will suppress cruise control operation. Or as previous threads on the same subject have discussed, a hair-trigger brake switch or dirty multifunction switch can do it.
But rather than shotgun and throw parts at the problem, the GM designers did one clever thing. They retain in PCM memory a list of the last few reasons that CC was turned off, whether it was by a brake light, SES code, or the switch. Get a dealer or somebody with a high end scan tool to look at that memory section and you will know for sure what to look at and fix next. Admittedly some dealers overcharge for this simple service, so call around.
But rather than shotgun and throw parts at the problem, the GM designers did one clever thing. They retain in PCM memory a list of the last few reasons that CC was turned off, whether it was by a brake light, SES code, or the switch. Get a dealer or somebody with a high end scan tool to look at that memory section and you will know for sure what to look at and fix next. Admittedly some dealers overcharge for this simple service, so call around.
No ses lights on. I do noticed a slight squeal from my rear passenger wheel. Brake pads were replaced last year but didn't touch the drum which I heard is for hand brake . Would that maybe contribute ? I will try get the PCM memory read also.
Then maybe drive the truck off a cliff.
Then maybe drive the truck off a cliff.
My cruise also did the same, just turning off by itself with no SES light or anything. It happened on two occasions for a few days.
The first time was after changing my tie rod ends and sway bar link. I know, no relations but still. It kept going off after I put it on for a few days and then worked fine.
Then the other occasion was this year. It happened when BestBuy installed my Viper system. It came off after two times then went back to normal.
I guess it just happens and it should operate back to normal after a while. You could disconnect the battery so that the PCM can reset. Doesn't hurt. Or lightly move cables around inside the hood.
I did hear that cruise control has a computer by itself but I'm not sure that it's definite though.
The first time was after changing my tie rod ends and sway bar link. I know, no relations but still. It kept going off after I put it on for a few days and then worked fine.
Then the other occasion was this year. It happened when BestBuy installed my Viper system. It came off after two times then went back to normal.
I guess it just happens and it should operate back to normal after a while. You could disconnect the battery so that the PCM can reset. Doesn't hurt. Or lightly move cables around inside the hood.
I did hear that cruise control has a computer by itself but I'm not sure that it's definite though.
I guarantee it's not true. The cruise control function is just a software subroutine in the main PCM's operating system.seanpooh said:
occasionally my cruise won't come set.
the odd thing about mine is it is always towing my boat on the way home from fishing.
The cruise will work going to wherever we are going but for some reason it won't work on the way home towing the boat.
Very odd. I've never worried about it because I don't live but about 20 mins from where I usually fish.
the odd thing about mine is it is always towing my boat on the way home from fishing.
The cruise will work going to wherever we are going but for some reason it won't work on the way home towing the boat.
Very odd. I've never worried about it because I don't live but about 20 mins from where I usually fish.
