In 1992, General Motors developed a larger full-size version of the GMC Jimmy called the GMC Yukon. In 1995, they decided to do the same thing with the Chevrolet S-10 Blazer and called it the Tahoe. Although larger than the S-10 Blazer--but less cumbersome than the Suburban--the two available V-8 motors in the Tahoe filled the engine compartment. This left very little room for certain components, including the windshield washer fluid tank. All that's visible of the tank is the fill neck peeking out in front of the battery.
Turn the steering wheel all the way to the right. Remove the keys from the ignition.
Remove the retainer pins from the left front fender well starting towards the front of the Tahoe and working your way back. Pry them out with a screwdriver--some retainer pins may have a small Phillips-head center pin that unscrews, and then a flathead screwdriver can be used to pry them out. Remove enough of the pins until you can gain access to the bottom end of the windshield washer tank.
Use a siphon hose to suck out any remaining washer fluid from the tank and allow it to drain into a clean drain bucket. If the reservoir is cracked and already empty, skip this step.
Remove the negative (black cable) battery terminal from the battery using an 8 mm hand wrench. Remove the positive (red cable) battery terminal from the battery.
Locate the battery hold-down wedge and remove the retaining bolt using the ratchet, the extension and a 13 mm socket. Remove the bolt and then remove the hold-down wedge.
Remove the battery.
Remove the battery tray retaining bolts using the ratchet, extension and an appropriate-sized socket. It is not uncommon for one or more of these bolts to come out hard and/or break. Remove the tray.
Remove the upper tank retaining bolt located just below the top of the tank.
Return the the fender well. Locate the lower tank retaining bolt, and remove it with the ratchet and a socket (no extension).
Unplug the two wire harness connections from the front washer pump located on the front of the tank and from the rear washer pump located on the back of the tank.
Remove the two bottom washer hoses located near each respective pump.
Remove the tank through the fender well. Remove the washer pumps from the old tank and install them onto the new tank. Place the new tank assembly into place from under the fender well. Reinstall by reversing the procedure. When replacing the battery tray, apply a light coat of anti-seize compound to all of the successfully removed retaining bolts. When reconnecting the battery, connect the positive (red cable) battery terminal first and the negative (black cable) battery terminal last.
Fill the washer tank with washer fluid. Use the fluid from the drain bucket if you siphoned it out. Place the keys in the ignition and turn it two clicks to the accessory position, then test the windshield washer and wipers to make sure they're working properly. Test the rear washer and wiper as well.
