20 Most Recent 1999 GMC Yukon - Page 4 Questions & Answers

ok make sure you have good fuel pressure
you must have good spark must fire a spark tester
if all that is good then check compression
and don't use STARTER FLUID on a GAS ENGINE it can blow a hole through the piston
hope this helps

please check your brake light switch located near the brake pedal. it could be faulty.

tnx 4 using fixya,

drcool

Need to get caught up on Preventative Maintenance AFTER you road test with professional scan tool & look at data My Guess: Spark Plugs are not changed every 3 years Oxygen Sensors are in the motor over 100,000 miles Egr issues ? Cylinder Misfires? OBD Codes in the systems? Worn Out TPS Sensor ? Fuel Pressure ? Worn Out Exhaust Converter-- for sure-- if original-thus loss of fuel control DO NOT THROW Parts at it Have it tested & find a problem

i would think yeplace the relay first

check your Head Light Fuses I know for some reason that Happen to me and I had to replace my head light fuses. I would also check the circurt line out and make sure its getting power to it.

sounds like tranmission may be causing a stall, better get it checked by automatic transmission specialist

check fuse

This is a common problem with the push button 4X4. The most common as the switch, second ist the 4X4 shift actuator motor on tbe side of the transfer case. And tbe third is the tcc module. But first xheck all fuses. Sometimes just simply disconecting the battery for 20 minutes does the trick too.

So when does it buck ? how well does it idle ? what was replaced

This is possible with engine off through a round inspection hole on transmission bell housing you can see the flywheel with a flashlight . now have someone rotate the engine by hand as you watch the flywheel a slight back and forth on rotation of engine can produce the noise and seeing the flywheel lag in rotation can prove the failure.

it has lost the code for the key or the immoblizer is bad.

Is the checkengine light on? If it is have it checked out. Have you changed the fuel filter? It may be clogged. Do you hear the fuel pump work when the key is on you might have a bad fuel pump.you can check pressure to see if it have a bad reading. Call auto parts store they can tell what the pressure should be.

Have you checked the freon pressure in the system with a gauge ?

It's hard to say without more information but the first place I would start would be with the fuel/fuel delivery system. Could be bad gas, it does happen; clogged fuel line somewhere in the system, clogged fuel filter, bad fuel pump. If it's fuel injected it could be dirty injectors. There are a couple of ways to clean them, a fuel additive or remove them for cleaning. The other area would be a sensor or module some where. Most service stations will do a diagnostic for around a hundred dollars. I take mine to the dealer and they do it for $75.

Try a tuneup or pulling all the spark plugs to see if they are bad. Make sure plug wires are not in contact with hot engine parts. Also check the firing order to see if two wires are crossed 1999 gmc yukon distributor timing This is most likely culprit. https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CB0QFjAA&url=http%3A%2F%2Fwww.tahoeyukonforum.com%2Fforum%2Fshowthread.php%3Ft%3D29529&ei=kU3eU4j9L6bL8AGFyIFA&usg=AFQjCNGo_N7LptLwSAuscS3F0Y3rzQ92XQ&sig2=-eO8J0AWB8Hw8VCniF7dFw&bvm=bv.72197243,d.b2U This is most likely culprit.

does it still not start/run ? if so get the OBD codes read as could be a number of issues

just pull front drive shaft

double posted, backup one post. (yours)

we use a voltmeter or DMM walfart has one for $10 bucks. use continiuty checks, google that and read.