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Yukon XL 1500

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Question
Traction control
Hi There, It sounds like you may have a malfunctioning traction control module. The traction control system monitors the steering and stability of the vehicle and engages when loss of traction has been detected. This is done by the use...
Question
Gas pump keeps shutting off. I've replaced the charcoal canister also the valve and still won't work
This is likely related to your EVAP emissions system and something called a purge valve solenoid. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects and temporarily stores the fuel...
Question
It's either the ABS control module or the rubber brake line from the caliper not sure causing the right front to sees with light b
Hi there. I would highly recommend NOT bypassing the ABS system, as not only is this a serious safety concern, but if an accident were to occur, it could cause serious issues with your insurance company. If the brake caliper...
Question
Replaced charcoal canister also the evap vent and the gas pump still shuts off on me after A few seconds of pumping
You may have a fuel tank that is not venting quick enough and causing your fuel back up problem. Your fuel tank has a two part tank with a crossover tube that equalizes the two parts of your tank. If...
Question
Brake rotors
Hi There, What you are describing is a sign of warped brake rotors. When you press on your brake pedal, this activates a hydraulic pressure which forces small pistons inside your brake calipers to push the brake pads against the...
Question
Radiator fan running max frequently
The fan circuit has a relay, switch contacts, and a temperature sensor. There may be other circuit components as well. If the fan is coming on when it is not supposed to, there is a fault in one or more...
Question
Engine in limp mode-- transmission has been checked and found to be fine. 2002 GMC Yukon XL
Hi there - the first task for a "limp mode" warning is to check for problem codes, even if they are intermittent, and whether the Check Engine light is on or not. Find out what is causing the Low Coolant...
Question
I need my catalytic converter replaced. I found out my truck requires a dealer only converter that's California compliant. Is this
Hi there. The folks at CARB (California Air Resource Board) have set emissions standards for California sold vehicles for several years; which includes specific catalytic converter design. So if a mechanic is telling you that you require a specific catalytic...
Question
I hit a curb pretty hard.. 5 to 10 minutes later my traction control light and my reduce engine power light came on.. Now ive cha
Any fault/error (or damage to the vehicle) that will affect drivability or vehicle performance "can" cause reduced power. Consequently, the codes that have caused the traction control warning light to illuminate should first be downloaded and if those codes implicate...
Question
Service park assist is displaying on dash
Hello, and thank you for writing in. Your vehicle is equipped with the Park Assist feature which will help you park in difficult situations. When the computer system detects there is an issue, the warning light illuminates to let you...
Question
My 2003 GMC Denali randomly apply's the reduced power setting which pushes out less than 50 hp and less than 38 mph.
Check the battery cables on the battery for if they are loose or corroded. Tighten up the battery cables and clean up any corrosion on the battery cables. A loose battery cable or corrosion on the battery cable will cause...
Question
How to tell if my Yukon has active brake control or not?
If you have a traction control switch to turn traction control on and off then you do not have active brake control. If you do not have the switch then you should be equipped with active brake control.
Question
Service Engine light is on in my vehicle had it inspected and it didn't past die to a sensor problem. Could this be the reason it
If the check engine light did not come back on for a couple days then you most likely did not get the problem fixed since sometimes after clearing a code it takes a few days to set the code again....
Question
Won't start
Hi there. There are several things that could be causing your GMC to not start. Sometimes it will be the crankshaft or cam position sensor that is causing an ignition timing problem. It is also possible that the electrical harness...
Question
Engine
Typically, if a short circuit occurred while replacing the battery, or the battery was installed (momentarily) with reverse polarity, or wires were left disconnected, all of the resulting electrical problems, that is the ones you are observing, would be present...
Question
I have a 2004 yukon denali it is not shifting right 1 and 2 are ok but once it reaches 40 mph my RPM goes crazy
What you are describing is often a sign of low transmission fluid or a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer...
Question
Belt squeal increases with speed
Hi there. Usually when a belt makes the squealing sound which increases in pitch and volume with the increase in engine RPM it is due to one of two things. First, the belt may not be properly tightened or is...
Question
pads are 2mm on 2014 yukon xl denali with 52000 miles...all works good...incidental finding...do I replace now? Pads and rotors? o
At 2mm, the pads are definitely due for replacement. The the thickness of the brake rotors should be measured and compared to the minimum thickness specifications. If they measure above the specs and there is enough thickness to them, resurfacing...
Question
My car does not pick up like it use to in any gear
The problem sounds like you either have low fuel pressure or have a clogged fuel filter. have the fuel pressure checked and if it is good the try replacing the fuel filter to see if this fixes the problem. Also...
Question
whining noise front of engine, EVAP and temperature control
Hello, thank you for writing in. The first two symptoms may be related. Finding a leak in the EVAP system will take some time and focus. If the noise goes away after fixing the leak, then we know we can...

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