20 Most Recent 1999 GMC Yukon - Page 11 Questions & Answers

It will ONLY click on the firewall, no volts on dash board , It will not do anything but click. Is there a relay ? It has a new starter, battery, fuses all the wires have been checked , cleaned WOW Do you have any ideas?

the switch could be at fault and/or see if fuses blown

GM has been having problems with the wiper on the gas sending unit in the tank. After years of use it wears through and only works once in a while. Unfortuneately you have to drop the tank to fix it. Fortuneately they have started selling just the replacement sending unit, you used to have to buy the fuel pump and all.

That would be impossible. If the head gasket has failed than the only tru fix is to replace it. This would involve an extensive disassembly of the major engine components. There are stop leak products on the market that claim to fix these problems. I can assure you that these are band-aides. As we know they only cover the wound they do not heal it. The only way you could fix it without taking the engine apart is to replace the engine with a used or remanufactured engine. This would still involve the transfer of parts from one engaging to another and the removal and install of the engine itself. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com! I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

check your spark plugs, see if they are black looking indicating flooding condition. hope you find it !

check your ignition system,coil,distributor cap,plug wires,COIL WIREignition module in distributor,(a good scan tool would be nice) would probably help with most of the above hope you find it

Check your drive shaft universal joints for any movement

Hi!!

The fuel pump fuse is located in the engine compartment fuel box, located on the center firewall

Don't forget to rate this post!! Good Luck!!

Hi Ben, What flap motor are you talking about? John

map sensor or other sensors usually set off an obd ll code look at air filter gauge its on duct that runs from air box to throttle body if it is in red change filter also check and or change fuel filter these to filters usually dont set off a trouble[ obd ll ]codes also when was last tune up --wires,cap,plugs,egr cleaning,replace filters etc.your most likely problem would be the fuel filter

I had the same problem, found there was air passing through the Lower Gasket of Intake manifold. Gasket was cheap, Removal of intake manifold as one piece takes time and is a good thing to have mechanic around for.

Fuel pumps are real common to go out on those vehicles

The fuel filter should be on the inner frame rail on the left side of the truck.This is the drivers side on the inner frame about the center of the truck.Just follow the fuel lines.If your not sure of what it looks like then first go and buy a filter then when you look under the truck you will see it.Make sure and relieve the fuel pressure be for removing the filter.You can do this by removing the fuel pump fuse from the under hood fuse center and start the vehicle.Let it run til it quits.Then shut the key off and this should relieve the pressure from the fuel lines.You will still have some fuel in the lines but it should not spray all over.Hope this helps.Good luck.

You have spark at the plugs right? Have you checked fuel pressure? It has to be 60 psi or it won't even fire.

i believe theres a service bllitin for the problem the injectors have an issue u need to replace the unit on top of manifold

sounds like the throttle body is coked up, take the vehicle to your local mechanic and get a fuel injection flush with throttle body cleaning, replace fuel filter & you would think you got a new car again. you may find an increase in fuel economy.

intake gasket if u have been adding water to yur radiater that meens that it has finally worked it way into the oil pockets and that would fill it up and look milky thats what it looks like when water and oil mix together