20 Most Recent 2003 GMC Yukon - Page 6 Questions & Answers

There is a short some where, That will have to be check out, At a auto electric shop, That it is repaired (Properly) End you don,t have the same problem with it anymore,

what needs fixed? Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/sean_54c3a3dc48a7773c

need to have vehicle scanned the trouble codes will be stored in the computer most auto stores offer thi service for free check ur local area there are a few hundred different codes or problems that can cause ur problems and being interment can also be an electrical connection/harness problem

RAISE TRUCK SAFELY, SUPPORT WITH JACK STANDS GRAB WHEEL TOP AND BOTTOM.TRY SHAKING THE WHEEL IF WHEEL MOVES WHEN YOU GBAB IT TOP AND BOTTOM. YOU HAVE A BAD WHEEL.IF WHEEL GOOD SOLID DONT MOVE.WHEEL CALIPER SEIZING UP.IF YOU SEE ABS WARNING LIGHT A FAULTY WHEEL SENSOR WILL CAUSE THE FRONT WHEEL LOCK UP.

Is the computer powering up, check the fuses marked ECM.

It is a good chance it is anti freeze from a leaking heater core. See if it smells like coolant. If so you can pull the coolant lines off the heater core in the engine bay and put them together to bypass it until it is fixed

i would say no on that ,need to drop tank

I won't make you feel any better, but time & mileagewon't always be the reason things act upSome people break down driving off the dealerslot, with a brand new vehicleI once worked at a ford plant & have seen them stopdead in the factory & being pushed off the dyno or strandedon the highway on my way to work, while being driven 4miles before going on a car carrierAt 6 to 8 or 9 years, has always seemed to be the pointwhere you get the longest run, of one or two issues a yearCheck for CodesCheck your dash lights,they should go off if it startsHow old is the battery? Just because one went 8 yearsthen next may go only 2 and a halfListen for the fuel pump when you turn the key on9 Years was always when my starters quitFuel pump is my guess,check pressure at engine

Worn out converter from too much fuel, causingit to overheat over time.While the converter may still be somewhat effective& you may not have any check lights on,I would checkfuel trim & also replace any front or upstream O2 Sensorsover 100,000 miles. Spark Plugs over 3 years oldWhat your trying to find out, is if an injector is leaking or an O2 Sensors has a slow switching count causing a richfuel mixture.Any vacuum leaks will cause a lean condition & the computerwill drive the fuel pulse or trim, rich to compensate

Your catalyc start to fail Dow you need replace.

WHAT IS IT DOING

first if you have a k&n air filter you damaged the mass air flow sensor next check the fuel pressure low pressure will cause both the problems your having

These trucks are known to have problems with the front wheel speed sensors that control your 'traction control'. The traction control is actually applying your brakes. Thats why when you turn it off, You can move with no problems. The only way to really know this for sure is to take it to a repair shop and have them diagnose the problem. You can always just replace the front wheel bearing assemblies (they have the wheel speed sensors built in), but that can get pricey.