check engine light
97 silverbullet
01-09-2007, 01:27 PM
I have a 94 3/4 ton silverado and the check engine light is on, the cruise doesnt work when it is on but when I turn the truck on and off it works again and the light is gone, anyone here have experience with that or know what the problem is, since its a obd1 i can't run to autozone and check the code and I dont feel like paying for the codes to be read. any info would be appreciated
2000CAYukon
01-09-2007, 01:40 PM
97 silverbullet
01-09-2007, 02:10 PM
well I checked my code and it was a code 12 and the 8th digit is K and I can't find it on the gm code info and my truck is a 94 and the only one I can find is K is an 87-91 with a 2.0L and my truck is 5.7
2000CAYukon
01-09-2007, 03:23 PM
well I checked my code and it was a code 12 and the 8th digit is K and I can't find it on the gm code info and my truck is a 94 and the only one I can find is K is an 87-91 with a 2.0L and my truck is 5.7
12 is the system is in diagnostics mode. If you use the table at the very end of the page I posted, it will cover most of the codes that your truck can have.
Was the check engine light on before you checked for codes?
//2000CAYukon
12 is the system is in diagnostics mode. If you use the table at the very end of the page I posted, it will cover most of the codes that your truck can have.
Was the check engine light on before you checked for codes?
//2000CAYukon
silverado122775
01-09-2007, 04:03 PM
12 is the system is in diagnostics mode. If you use the table at the very end of the page I posted, it will cover most of the codes that your truck can have.
Was the check engine light on before you checked for codes?
//2000CAYukon
His first post states that he had the check engine light on that is why he needed to get the codes.
Was the check engine light on before you checked for codes?
//2000CAYukon
His first post states that he had the check engine light on that is why he needed to get the codes.
2000CAYukon
01-09-2007, 04:58 PM
His first post states that he had the check engine light on that is why he needed to get the codes.
He also said (in his first post) that if he turns it off and back on the light goes out.
//2000CAYukon
He also said (in his first post) that if he turns it off and back on the light goes out.
//2000CAYukon
97 silverbullet
01-09-2007, 05:41 PM
ok the light came on and then went off I went to go check it but it was off. So the only code that I got was code 12. So do I have to wait till it comes on again and then check it. or what?
2000CAYukon
01-09-2007, 06:12 PM
So do I have to wait till it comes on again and then check it. or what?
Yep. On my 90 K1500 Sierra, the light has to be on to pull a code jumpering A and B on the ALDL connector. I also have WinALDL and it will show recent codes so a scan tool should be able to tell you what the code is (or wait until is comes back on).
//2000CAYukon
Yep. On my 90 K1500 Sierra, the light has to be on to pull a code jumpering A and B on the ALDL connector. I also have WinALDL and it will show recent codes so a scan tool should be able to tell you what the code is (or wait until is comes back on).
//2000CAYukon
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