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A check engine light can indicate a broad spectrum of problems with your 2002 GMC Yukon XL 2500. In some cases you need to pull over immediately to prevent damage while in others you merely need to tighten you gas cap next time you stop in order to reset the service engine soon light. The video above shows how to locate the on board diagnostics (OBD) plug on your 2002 Yukon XL 2500, how to read the trouble codes and how to reset or clear the check engine light using a scanner on your Yukon XL 2500.
Intermittent Check Engine Light: If the check engine light on your 2002 Yukon XL 2500 is intermittent, try to take note of the conditions when this happens. For example, does it happen when you accelerating, driving on the highway or does it appear at low speeds? This will help your mechanic evaluate the issue. Steady Check Engine Light: If your check engine light is on every time you operate your Yukon XL 2500, you need to have it checked as soon as possible, especially if you notice performance problems or unusual noises. Flashing Check Engine Light: If your check engine light is flashing, stop driving your Yukon XL 2500 and have it towed to your nearest mechanic - you probably have a very serious problem with your car and you risk ruining your engine by driving it. If you are unsure about what your diagnostic trouble codes mean; have your Yukon XL 2500 diagnosed by a professional automotive technician.
If you are leaking oil and parking on your oil spots each night, the oil is breaking down your tires' rubber2002 GMC Yukon XL 2500 SLT 8.1L V8
See how to seal up minor power steering fluid leaks2002 GMC Yukon XL 2500 SLT 8.1L V8
If your brake fluid is a little low, learn how to add some here. Ignoring a low level leads to big problems2002 GMC Yukon XL 2500 SLT 8.1L V8
On many cars, the high beam bulb runs at reduced power during the day - check 'em and change 'em!2002 GMC Yukon XL 2500 SLT 8.1L V8
Avoid tickets and accidents with both working headlights! New bulbs are much brighter too2002 GMC Yukon XL 2500 SLT 8.1L V8
Don't be caught in the fog with burnt out fog light bulbs2002 GMC Yukon XL 2500 SLT 8.1L V8