20 Most Recent 1999 GMC Yukon - Page 6 Questions & Answers

Remove distributor cap, make sure you unplug ignition coil...remove no. 1 spark plug. have someone bump key slowly while you put your finger where the plug goes...you will feel pressure push against your finger...when the pressure stops, your No. 1 piston is at top dead center, your rotor will be pointing to where your No. 1 plug wire should be. Place your distributor just above without installing . If not aligning place your No. 1 plug wire there.. , and use that as a starting point for your firing order....good luck !!! Hope this helps...

check all earth wires

to successfully test for a bent crank you will have to take it to a engineering shop that is set up to grind cranks as they will have the proper lathe to test it in. If the crank has a main bearing either side of a big end or a set of big ends then the chances of it being bent would be slim. What indications are there that makes you consider it is bent.

check fuses,

on the final output shaft housing by where the axle drive comes out..it should have 2-4 wires on it..

sounds like a bad relay to me..

It probably is related to the NORM/LOCK switch, or the wires to it. Remove the switch, unhook the wires on it. The switch was either on or off, with wires removed the car thinks its off, so there is a 50% chance the car will think you want NORMAL mode.

cloged feul filter but you will also have toc/o the feul pump

it shuld work on high temperature only

o2 sensors or pluged catilitic converter sorry about spelling

with ampmeter take the current draw of battery max amp 30mAif more than 30mA remove fuse one at a time and watch if current draw go down. when current draw go down on a fuse than that is the circuit that drain your battery

This is the relearn process if you replace a key and don`t have a scan tool.You have to get the codes from the Theft Deterrent module to see what could be causing the problem.If your key is worn out it could cause this problem.Try using a different key if you have one.The dealership parts department has a tool to check the keys.Usually done at no charge.Only takes seconds to do.Could also be a bad ignition cylinder.That`s why you need the codes.Other wise you are just spending money and buying parts that you don`t need.Let me know what codes you get and I`ll be glad to help you out.Good luck.

bad door switches

That was a good first shot, but I would suggest that fuel injection might be the source of your "Skipping" problem?

i can recommend you to RUN the scanner/computer for easy diagnostic and fix it. The electronic vehicle is complicated you have faulty the PCM or BCM.etc.see the diagram attached.God bless you

Maybe it stands for ... Heated Seat - Front...???