GMC Truck Forum banner

How to reset service engine light

1610 Views 5 Replies 6 Participants Last post by  kids-at-711
I have a 1990 gmc 4x4 it has a 350 engine and I need to reset the service engine light can some tell me how tp reset it?
1 - 6 of 6 Posts
Put black electrical tape over it.
You can "reset" it by disconnecting the battery, but like Ravine said, it's on for a reason.
It's probably your o2 sensor that's shot, have you tried scanning it to figure out what the problem is?

Sent from my iPhone using Tapatalk
Just need a paperclip and the ability to count.
1 - 6 of 6 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.