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Check engine light won't turn on!?!?!?

deftone989

By deftone989
in Ask A GM Technician

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deftone989 Enthusiast

deftone989

Posted
Posted

GM-Tech,

 

Hows it going sir. I recently asked your advice about if I should replaced 3 out of 4 of my O2 sensors. Well my vehicle passed because of it. 3 sensors total ran me close to $200. Mechanically my truck is fine. BUT....AZ state law won't pass me cause of my "service engine soon" light not comming on. What would you think it would be.

 

My service engine light was on for the longest time. And as recently as a month ago it has not come back on. So did the light being on that long burned the bulb? The service light was on for like a year and a half prior to a month ago.

 

I have been taking off my cluster to change out the "cluster sticker" twice. Also I have been taking off my cluster to recalibrate my cluster needles. I'm asking what could cause the service light not to come on during acc/ignition testing. Could it be the buld, wiring, fuse??? If I do take it to a GM dealer; what kind of testing should I ask for, and how much do you think diagnosis would run me including labor to fix the problem.

 

Thanks much GM Tech; you have been such great help. THANX: )

 

David

 

BTW...My truck is a 97Tahoe 5.7L vortech 4X4

GM-Tech Senior Enthusiast

GM-Tech

Posted
Posted

What the heck is a "cluster sticker"?? And what do you mean recalibrate the needles?

 

Sure, the bulb could burn out I suppose. Can't say I've seen that, but if it was on constantly for a year and a half, I'd say that could contribute to a shorter life. It's not wiring or a fuse.

 

I have no idea what they'd charge you to check this out or fix it. All depends on what they charge per hour and what it would require to fix.

deftone989 Enthusiast

deftone989

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Posted
What the heck is a "cluster sticker"??  And what do you mean recalibrate the needles?

 

Sure, the bulb could burn out I suppose.  Can't say I've seen that, but if it was on constantly for a year and a half, I'd say that could contribute to a shorter life.  It's not wiring or a fuse.

 

I have no idea what they'd charge you to check this out or fix it.  All depends on what they charge per hour and what it would require to fix.

 

 

 

 

 

Thanx GM Tech for the reply,

 

As far as the the "cluster sticker"; I replaced the original "cluster sticker" twice. First with an all white cluster sticker; and I just put another one about 6 months ago. It's the face gauge; it comes off like a sticker..thats the best way I can describe it. As far as recalibrating the needles...I mean repositioning them cause a couple times I stuck in the needle to hard and a couple of the guages would not read accuratly cause of it. The needles were pressed to hard against the cluster.

 

Some of the parts stores I have been to say I can me a bulb too. One of the employees there said they have heard of it going out before. Anyways thank you for your time GM Tech I know your a busy man. Any and all advice is greatly appreciated. Any more diagnosis; please fling it my way...THANX: )

 

David

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