DRL's problem.

[anumber1]

They also only come on when in gear. The drl lights on my 99 are off in park and neutral.

 

Make sure you are looking for them with the truck in gear.

[txab]

They also only come on when in gear. The drl lights on my 99 are off in park and neutral.

 

Make sure you are looking for them with the truck in gear.

 

 

+1

[sahls01gmc]

And you can't have the parking brake on either.

[Dirtracerk27]

Still working on the issue.

[cameron24v]

Put tape over the sensor. Lights on!

 

Sent from my HTC One using Tapatalk

[bgbdwlf2500]

They only work in gear on my truck