244 VEHICLE CARE. To check the P (Park) mechanism'sholding ability: With the enginerunning, shift to P (Park). Thenrelease the parking brake followedby the regular brake.Contact your dealer if service isrequired.Wiper Blade ReplacementWindshield wiper blades should beinspected for wear or cracking.It is a good idea to clean the wiperblade assembly on a regular basis.When worn, or when cleaning isineffective, replace the wiper blade.For proper windshield wiper bladelength and type, see MaintenanceReplacement Parts 0 296.CautionAllowing the wiper arm to touchthe windshield when no wiper bladeis installed could damage thewindshield. Any damage that occurswould not be covered by the vehiclewarranty. Do not allow the wiperarm to touch the windshield.To replace the wiper blade:1. Pull the wiper assembly awayfrom the windshield.2. Lift up on the latch in the middleof the wiper blade where thewiper arm attaches.3. With the latch open, pull thewiper blade down toward thewindshield far enough to releaseit from the J-hooked end of thewiper arm.4. Remove the wiper blade.5. Reverse Steps 1–3 for wiperblade replacement.Windshield ReplacementHUD SystemThe windshield is part of the HUDsystem. If the windshield must bereplaced, get one that is designed forHUD or the HUD image may look outof focus.Driver Assistance SystemsWhen a windshield replacement isneeded and the vehicle is equippedwith a front-looking camera sensor forthe Driver Assistance Systems, thewindshield must be installedaccording to GM specifications forthese systems to work properly. If it isnot, there may be unexpectedbehavior and/or messages from thesesystems. See Object Detection SystemMessages 0 138.
