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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.
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
If your blinker doesn't blink, or blinks rapidly, you likely have a burnt out bulb2002 GMC Yukon XL 2500 SLT 8.1L V8
Sure you can take it in for a $19 lube, but are you OK with a stripped oil pan and cheap parts in return?2002 GMC Yukon XL 2500 SLT 8.1L V8
Unlike a waist belt, these usually become looser as they age! Learn how to check it here2002 GMC Yukon XL 2500 SLT 8.1L V8
If your battery has green or white cruddy deposits, it is probably not getting enough juice from and will likely wear out sooner2002 GMC Yukon XL 2500 SLT 8.1L V8
Coolant hoses wear out over time and need to be replaced - check 'em early and often2002 GMC Yukon XL 2500 SLT 8.1L V8