What does this warning light mean?

[NickGT]

http://members.shaw.ca/nickgt/help.jpg

Don't have the owners manual. This is one of our company trucks and that light just clicked on. It seems to drive fine, I notice the oil pressure fluctuates from about 3/4 to 1/2 on the gauge when I brake. Checked the oil and it has plenty. Anyone wanna take a stab at it?

It's a 2003 GMC Sierra 2500HD.

[Dubluvr]

That's would be the Check Engine Light and usually you need the code reader to find out what sensor is making it come one. Take it to the dealer and have them read the code.

[rmk]

check engine.

[projekz]

Check engine light!

[vengie]

check engine light
could mean alot of things, bring it to the dealer or an auto store to get scanned and find out the exact problem that set it off

[kevie88]

Check engine light.

9/10 times it's just the oxygen sensor in the exhaust. However, this being a GM product god only knows! :rofl:

[Grogador]

"attack helicopters inbound" warning light !!!

ps. reading codes should be free

[NickGT]

Thanks for the info fellas

[adam c]

You have a modified GT, on beyond, a grown adult and you don't know what that light is?

[RATM]

Originally posted by adam c
You have a modified GT, on beyond, a grown adult and you don't know what that light is?

now now, be nice

[badatusrnames]

Originally posted by adam c
You have a modified GT, on beyond, a grown adult and you don't know what that light is?

Maybe he's never driven a junker at some point in his life like the rest of us and simply never seen a CEL before??

And in all fairness too, not all vehicles use that icon as a CEL.

[benyl]

Sometimes that light comes on when the gas cap isn't put on right.

[Tik-Tok]

Originally posted by benyl
Sometimes that light comes on when the gas cap isn't put on right.


Probably it, but as said, go check the codes.

[NickGT]

Originally posted by adam c
You have a modified GT, on beyond, a grown adult and you don't know what that light is?

I've owned 4 mustangs in my life (1990,1989,2002,2005). No GM products. Never once have I had one of them throw a CEL.

Sooner or later it was bound to happen. Sorry lol. If it was my car I would have already used my flash tuner to check for codes. But since its not..

Turns out it was the MAF sensor. Bought some cleaner and a new air filter. So hopefully that solves it.

-edit-

Truck runs good again. :thumbsup:

[revelations]

This is why some vehicles put it in plain english... "SERVICE ENGINE"... how would one get that wrong?

[YamahaV8]

Auto value scans vehicles for free.

[badatusrnames]

Originally posted by revelations
This is why some vehicles put it in plain english... "SERVICE ENGINE"... how would one get that wrong?

Oh someone will find a way.

[revelations]

Originally posted by badatusrnames


Oh someone will find a way.

They'll probably add fuel injector cleaner to the oil filler thinking that it will do the trick (seen it happen before).

[badatusrnames]

Originally posted by revelations


They'll probably add fuel injector cleaner to the oil filler thinking that it will do the trick (seen it happen before).

Or a bottle of head gasket repair...

[Supa Dexta]

This is the dumbest light I've ever seen in a car:

http://www.dsmtuners.com/forums/attachments/newbie-forum/55883d1126234900-weird-dash-light-symbol-what-radiator.jpg

Haha.. Most people describe it as a roman building, or court house.. And its the radiator fluid.. :nut:

[SJW]

Stop doin jumps with the company truck already.

[CelicaST-162]

Originally posted by Supa Dexta
This is the dumbest light I've ever seen in a car:

http://www.dsmtuners.com/forums/attachments/newbie-forum/55883d1126234900-weird-dash-light-symbol-what-radiator.jpg

Haha.. Most people describe it as a roman building, or court house.. And its the radiator fluid.. :nut:

Most MKIII Supra owners call that light "the birdcage" light.