A: Set the wipers to park position before disconnecting both washer hose and air inlet grille panel. Disconnect the Wiper Arm nut by removing its cover first. You can use a battery terminal puller when manual rocking fails to release the Wiper Arm from the pivot shaft. Use small rapid motions to detach the Wiper Arm securely from its mount on the shaft. Use a thumb to press down the end of the Wiper Blade retaining clip followed by sliding the blade off the Wiper Arm hook. Pull out the Wiper Arm hook through its open position in the Wiper Blade. To install the Wiper Blade you should insert the Wiper Arm into the opening in the Wiper Blade and push it all the way through the clip until you feel it engage. Keep the wiper system in park position before starting to prevent any damage. Activate the wipers and push the control switch to off state to make sure the system is parked correctly. Use a wire brush to clean the Wiper Arm pivot shaft knurls before you put the Wiper Arm on the shaft and center the Wiper Blade over the windshield marks; substitute these marks with position 1 - 107.2 mm (4.22 in) and position 2 - 68.1 mm (2.68 in) when the windshield does not have marks. Fix the nut onto the Wiper Arm and tighten it to 32 n.m using 24 lbft torque. Coat the washer hose with windshield washer solvent to make it easier when you attach it to the fitting on the air inlet grille panel. Then test the wipers and washers by connecting the hose to the fitting before tightening hardware.
A: Before you begin mounting the new Wiper Arm engage the ignition then set the Wiper Switch to delay before turning the ignition off when wiper arms reach the bottom of their movement. Take off the Wiper Arm nut by loosening its washer hose connection at the washer nozzle then removing the cover. The Wiper Arm puller (J 39822) allows you to separate the Wiper Arm from its connection on the wiper transmission drive shaft. To install position the measuring tool perpendicular to the Wiper Blade then put a pin or drill bit of the same size into the Wiper Arm to release the spring tension. Put both wiper arms onto their respective wiper transmission drive shafts while confirming that the right arm measures 97-107 millimeters (3.82-4.21 inches) from the wiper end to the air inlet screen and the left arm starts 125-147 millimeters (4.92-5.78 inches) from the wiper tip to the screen. Hand-tighten the Wiper Arm nut till it reaches the torque level of 30 n.m or 22 lb ft. Reinstall the wiper cover after taking the pin from the Wiper Arm and connect the washer hose back to the washer nozzle. Check Windshield Wiper performance by running the system.
Q: How to replace the windshield wiper arm on Buick LaCrosse?
A: Start by parking the wipers in position and switch off the ignition before releasing the fluid connection at the Wiper Arm. Pry off the Wiper Arm nut cover and Wiper Arm nut before using the Wiper Arm puller (J 39822) to detach the Wiper Arm from the wiper transmission. Align the Wiper Arm with the wiper transmission until the wiper blades match the small notches on available windshield blackout patterns 1 and 2 for proper installation. Apply threadlocking compound which meets gm p/n 89021297 or its equivalent product to the Wiper Arm nut before you install and tighten it to 30 n.m or 22 lb ft. After positioning the wiper nut cover on top install the washer hose back to the Wiper Arm. Turn on the wipers to confirm normal working and seal the hood last.