20 Most Recent 1999 Chevrolet Tahoe - Page 6 Questions & Answers

Ignition module or coil.

Usually the ignition module, which can be tested free at most part stores.

Sure sound like a bad coil. As it heats, a cracked wire separates enough to loose connection.

Transmission rebuild time I'm afraid.

You can use a jumper wire to bypass the switch momentarily. Probably bad motor as this window gets used more than any other.

same question twice.

Some of these are located so that you must jack up the passenger front wheel and remove it. then remove the inner fender panel and you should now be able to access the motor. Clean all the trash out of the heater box while you have the motor out. FYI if the motor has stopped working, you may want to check the resistor first, as it is easy to get to, and if blown will cause heater not to work. Also check the fuses first of all.

If it is only the left, check the bulbs first, then fuses, then bad turn signal switch.

Check EGR.

I think there is an ignition module which can be removed and tested. These fail quite often. Parts store can often test these.

Tune up, Bad EGR, bad coolant temp sensor, coil, plug wires

Use trim removal tool from parts store.

Wow. This could be most anything. Bad ignition coil, bad plugs and wires, bad coolant temp sensor, EGR, vacuum leak, bad timing chain....

May be just bad volume control switch, or loose connection at speaker. You can try using electronic contact cleaner sparying down the shaft of the control after removing the knob. If this helps, you need new switch (or better still, new radio). If you can access the speaker that fails, you may inspect the wires which actually run from the voice coil to the speaker cone. If loose, it may be possible to re-solder them.

Replace the master cylinder.

This is not good and could be very dangerous. Likely causes are leaky fuel injector(s), engine mechanical problem such as bent or burt valve, hole in piston, mis-fire on one or more cylinders, and others. Gas in the oil can cause major engine problems. Do not try to run engine until fixed.

Check fuses. Check that wiring to cluster is fully engaged. Both these get their 12 volt feed from the same wire, and then the sending units provide the grounds.

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Most likely the ignition switch. But could be an electrical short. If you unplug the switch and it stops. Replace the switch. If it doesn't, then you will have to find the short in the wiring.

get a Chilton's manual for your vehicle so you can do your own repairs.