2005 cruise control

[Banshman]

Hi everyone,
My 05 silverado 2500hd cruise just stopped working. I use it all the time but yesterday wasn't working. I have led bulbs in the reverse ans stop/parking lights that I installed a couple years ago with the led flasher module and the cruise has always worked so I don't think it's that. Fuse is good. Any ideas what it could be?
Thanks

 

[99Sierra2500]

If everything checks out, I'd inspect the wires in the column.

 

[ORVietVet]

Problem may be in the stoplight/brake switch. Check to see if the brake lights work correctly, including the 3rd brake light.

I can't help but remind members here that it seems like when there is lighting circuit problems, of any kind, the led's are the culprit over 50% of the time. Check all grounds. There is also a connector plate, for the taillight assemblies, on passenger side rear that is exposed to all elements and salt on the roads states eat them up.

 

[stutaeng]

Also check to see that you don't have any misfires. I believe if you have a misfire the ECU won't enable cruise control?

 

[ORVietVet]

Also check to see that you don't have any misfires. I believe if you have a misfire the ECU won't enable cruise control?

Good call, I forgot about that. Some powertrain computers allow a certain amount of misfires before turning on a CEL.

 

[Banshman]

No check engine light but ill scan it anyways. The brake switch was just replaced a couple weeks ago for an unrelated issue. Ill double check all lights and swap regular bulbs back in to test

 

[ORVietVet]

The CEL may not be on but you will want to check for misfires count. The brake switch, a couple weeks ago, is likely related. What brand switch was installed? They can be a tricky install, too. I would double check the install and the switch quality.

 

[Banshman]

It was standard motors from rock auto

 

[ORVietVet]

It was standard motors from rock auto

Standard can be a 50/50 crapshoot. May be good but install could be suspect. I know you likely dread going back in there. It is a PITA.

 

[Banshman]

What brand is good? Gm?

 

[ORVietVet]

Genuine GM or AC Delco is always my choice.

It may or may not be your problem but when I was in the shops, I saw a lot of Standard parts fail and is worse now, especially Dorman Products

 

[Marky Dissod]

Genuine GM or AC Delco is always my choice.

Their quality may not be any better, but at least when it fails you get far less hassle exchanging it for another one.

 

[AuroraGirl]

Trailer wiring fuses should be pulled to rule out some crossed circuits. When hooked to my trailer with bunked wiring,cruise will not engage with lights on, if you’re just driving the hot wire for charging a battery could be touching any of the other in the bundle and contributing to why it won’t work.

Also use a scan tool to see if the switch is working and the computer reports the reason for inhibit if it indeed is

 

[Banshman]

I've had the led bulbs in the taillights for a couple years now with no issues. Only thing I did recently is the brake switch

 

[AuroraGirl]

I've had the led bulbs in the taillights for a couple years now with no issues. Only thing I did recently is the brake switch

Check out the tail lamp ones specifically and look at them outside of the housing when on and then on the brake.

The bulbs can fail partially and look okay outside but be a mess circuit wise with barely any chips working etc

 

[Banshman]

Update. Had the truck scanned as well as the brake switch tested. Conclusion is the switch is bad. Gm part is discontinued. I still have the rock auto warranty so I'm trying another standard motor brand. Tech said my torque converter lock up is also affected by that switch. New switch is on order. Ill update next week