CEL flashes on and off? Sounds like a mis-fire, could mean a few things. Hook a scanner up and pull the code, check back.
SOURCE: 1999 GMC Suburban 2500. 454 engine
sounds like fuel pump pressure. I had the same thing happen to me in a Lincoln mark VII and the electrical connection was shorting out in the fuel pump. I changed the fuel pump..Returned under warranty) put the new one on with filter and had no problem with it.
SOURCE: 2001 GMC Yukon Flashing Check Engine Light
dear sir the flashing check engine light means the truck was misfiring at the time of the incident .If the light is still on you can go to auto zone they will pull the codes for you and reset the light if you like.but if running good now then probably nothing to worry about .
SOURCE: truck won't start and died while driving
Likely the O2 sensor is seeing an overly rich fuel mixture and since it's beyond its range it is throwing a code. I don't remember ever seeing an O2 sensor shut off the engine. I'd look over the fuel pressure regulator temp sender and throttle position sensor. Possible one of those is sending mis-information and causing rich condition. There are other items that can do this as well but only go there if you strike out with what I suggested.
SOURCE: grinding under car while driving - brakes dont work HELP!!!!!!!
Wow, you have a few problems there. The grinding sounds like a driveline problem. Does the grinding get worse or louder as you increase speed? That grinding could be coming from a number of places. Everything from a universal joint on the driveshaft to the transfer case. Try shifting from 2WD to 4HI. Does the truck go into 4HI? If it does, shift to neutral, and put it back into 2WD. Sometimes the actuator for the 4WD can get stuck. If that doesnt work, can you try to pinpoint exactly where the noise is? I know that sounds hard, and I saw where you wrote you can feel it under your feet. Is it everywhere though? Can you feel it in the steering wheel, for example?
As for the brakes, are they always that hard to stop? Or is it after the grinding starts? Is either the brake or ABS lights on on the dash? Does the pedal feel mushy or very hard? A mushy pedal usually means a bad master cylinder, while a very hard pedal usually means a bad power brake booster. I'll be honest with you, none of what you described sounds cheap, regardless of where you take the truck to get looked at. They are most likely going to charge you for a few hours of diagnostic time just to figure out whats wrong. Thats why I asked if you could try to narrow down exactly where the noise is coming from. Theres a better than average chance your going to get ripped off, simply because it's not clear and obvious what the problem is. Do you know anyone who has any knowledge of cars? If so, take them for a ride and let them hear it. 2 heads are always better than one. If you can think of anything else, let me know, and I'll be glad to try and be of more help.
Testimonial: "thank you very much for taking the time to give such a helpful answer... i appreciate your time. "
118 views
Usually answered in minutes!
×