Purchase a Hanes Manual on the 99-02 GMC sierra, & Chevy Silverado they average 17 bucks at your local Parts Dealer. that should tell you how to do all sorts of maintanance on your GMC.
Disconnect the battery, remove the spark plug cables and boot covers, and remove the old spark plugs. Properly dispose of the old spark plugs. Next, put in the new spark plugs, reattach the spark plug boot covers and spark plug cables and reconnect the battery.
Disconnect the battery, remove the boot cover and spark plug cables, and pull out the old spark plugs. Put in the new spark plugs, replace the boot cover, and spark plug cables, and reconnect the battery.
If you mean that the wire came out of the boot, then pull the boot off of the spark plug and use a spark plug socket to remove the spark plug.
Pop the hood open, remove the filter to the carburator, remove 1 spark plug wire boot at the front right side while facing the engine, remove the spark plug, add the new spark plug as well as the spark plug wire boot.
Disconnect the battery, remove the spark plug cables and boot covers, and remove the old spark plugs. Next, put in the new spark plugs, reattach the boot covers and spark plug cables and reconnect the battery.
Disconnect the battery, remove the intake manifold, remove the spark plug boot covers and cables, and remove the old spark plugs. Put in the new spark plugs, attach the spark plug boot covers and cables, replace the intake manifold and connect the battery.
Disconnect the battery, remove the spark plug cables and boot covers, remove the old spark plugs. Next, put in the new spark plugs, replace the boot covers and cables and reconnect the battery.
Disconnect the battery, remove the cables to the spark plugs and the boot covers, and remove the old spark plugs. Next, put in the new spark plugs, reattach the boot covers, reattach the wires and reconnect the battery.
Disconnect the battery, remove the spark plug cables, and boot covers, and remove the old spark plugs. Put in the new spark plug, replace the boot cover and cables, and reconnect the battery.
Disconnect the battery, remove the engine cover, remove the spark plug cables and boot covers, and remove the old spark plugs. Put in the new spark plugs, attach the boot covers, and cables, replace the engine cover, and connect the battery.
Disconnect the battery, remove the spark plug cables and boot covers, remove and dispose of the old spark plugs. Next, put in the new spark plugs, attach the boot covers and cables and reconnect the battery.
Remove the coil pack for each cylinder. On the bottom of the coulpack is a spark plug boot. Under the boot is the spark plug.