The timing should be set at 0 degrees.
timingchain
No this motor has a chain it should never need replacement if vehicle has had oil changes on a regular basis
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There is no reset button on the thermometer in a rear view mirror on a 1999 GM Yukon. However, you can try to reset it by disconnecting for five minutes.
Try disconnecting the alternator, could be the diode pack
The windshield reservoir on a 2001 Yukon XL is removed by taking out the retaining bolts and disconnecting the pump motor. The reservoir can then be pulled from its mounts and lifted from the vehicle.
it should be the same as any other vehicle, disconnect the battery for about 10 minutes then reconnect it
Never, it does not have a belt, it has a chain.
You can replace the marker lights on a 2008 GMC Yukon Denali by removing the retaining screws and disconnecting the wiring harness. The bulb can then be unscrewed and a new bulb put in place.
Why ?
To the right of the glove box.
The right fuel psi for your Yukon should be set at 14 psi. and you should see a different in it idling and response.