Radco

A stupid question but
I want to change the third brake light bulbs to LED.
Will that cause a issue with the cruise control like burned out bulbs do ?
I have no code issues with all interior LED and reverse bulbs !

Thanks

Oldblue

Some have installed LED 921 bulbs, made for brake lights and had no problems, these weren’t cheap.
I’ve installed 921 LED bulbs in Oldblue, and the cruise control didn’t work, so back to incandescent 921’s
https://www.google.ca/search?q=led+9...&client=safari



https://www.diodedynamics.com/3rd-br...t-hhr-one.html

Here’s my experience with LED’s
https://www.chevyhhr.net/forums/mods...t-59848/page4/

donbrew

Some have a built in resistor. If they are labelled "OBD compatible" they should work. Or, add a resistor after doing the research involved.

Radco

Thank you . That is what I thought ! I do not want to add a resistor ,

I added LED'S to the reverse light w/ no codes !

But they do not affect the cruise control like the third brake light !

SO guess i will stay with the OEM 921 bulbs ! Again

donbrew

Here is one that should work. I Mis lead, the label is "CANBUS compatible".
https://www.ebay.com/itm/403685813921?hash=item5dfd8caea1:g:nv0AAOSwEvViklc L&amdata=enc%3AAQAHAAAA4B4V8rqic%2FKkO6l2w0ifMBG2s OzYNFO7%2FC6bqSuAPBqkUN%2FJl1wsk4GIHgTF2y80PoaenEI rfR159l8jaoSSG2adhAoHoammapBKTJb5ok7TR5%2FXOPxFKpM ytKtCXIeZjTDL%2BHKhK1PKfi0pTjg4RJk5FK1tkFdvHDrX6WB ntDkpFYC0M6U%2BwobzdsQz3gDszqyP2duE%2FYGeRQeH3sXMh fV2y4XDurNNnFrXncmMEYxcXS79GcW%2FvQ4J9TV895DkS6exH G88zwdl3w5xQhDp66rELfHcVq5ja0y3x6fKCy0B%7Ctkp%3ABF BMzpnR4btg

https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313&_nkw= 921+led+bulb+canbus%27&_sacat=0&LH_TitleDesc=0&_od kw=921+led+bulb+obd&_osacat=0&LH_PrefLoc=2

Oldblue

Order red not amber for brake lights

Radco

Thanks I will check them out and see if that brand is in the states !
I am going to have to look n my fuse/bulb kit, I may have a few LED 921, That may be canbus ready !

firemangeorge

What is there to gain by putting LED bulbs in the CHMSL (3rd brake light) ? Does it make it brighter ? If so, you'll be another one of those folks with the blinding brake lights at night. My opinion is the stock bulbs put out plenty of light without the hassles of LED's.

PulpFriction

Life.

​​​​​​Me, I'd put in the standard bulb and hope I live long enough to need to change it again.

Lonwane

Not that it matters, but, I like how quick LED's turn on and off.
I run LasFit Canbus 921's in my CHMSL.
Every light bulb in my HHR and in my house are LED's.
Again, this is just my preference.
As previously stated, I have issues.