what could cause the check gauge to come on? GMC 98 1500 Sierra 4x4
That is letting you know that there is a start of a engine miss fire. You may need a tune up. A miss fire can cause damage to the catalytic converter, so it needs to be taken care of. I would say to go to an auto parts store to have the vehicle scanned for trouble codes, but one usually does not get set with a flashing check engine light, just when it stays on it sets a code in the computer. You could see tho, they would do it for you and if there are any codes, write them down.
Search GMC Sierra 1500 Questions
GMC Sierra 1500 Experts
Related Models For Sale
Used Cars For Sale