I have a 99 GMC 1500 with the 5.3 engine. 144,000 miles and the check engine light came on.
Nothing appears to be wrong with the truck. How do I turn off this light
- posted
20 years ago
Turning off the check engine light
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- posted
20 years ago
Check with Autozone or someone who can read the codes, then unplug your battery for about 15 minutes, should reset.
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20 years ago
Hi!
You can clear the codes by disconnecting the battery or pulling the ECM fuse for a while. Several minutes should do fine.
Sometimes it happens that the ECM will throw a code for no reason, and this is possible. But if the light comes on again, get your codes read at an Autozone.
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20 years ago
Chances are you've got an O2 sensor related code (with that many miles on it). Like the other guys said - have an Autozone check it out, but please don't be upset if they ask you to wait a few minutes because they're extremely busy. (this is an inside request guys, I've worked in the 'Zone for over 2 years now - you outta see some of the people that flip out because we ask them to wait 5 minutes for a free service.....)
Jeremy
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20 years ago
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20 years ago
Auto zone has scanners they let you borrow?