Mechanics

GMC SIERRA CHECK ENGINE LIGHT PROBLEM

1992 GMC Sierra • 300,000 miles

What type of scan tool do I need to check the codes on my truck? I have a check engine light on and I am getting poor gas mileage. I know that it is an older truck but it has run great.
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Developer7
November 1, 2012.



You will need an OBD1 scan tool. Once your computer detected a trouble code it sets the check engine light and will run in a limp mode until you replace the sensor or part that has failed. Your truck will still run but not efficiently.

2CarPros Mike
Nov 1, 2012.
Go to the parts store most will ckeck your codes. Than come back. Gl

Cadieman
Nov 1, 2012.