2014-2018 Silverado 1500，Sierra 1500;2015-2019 Escalade，Tahoe，郊区，Yukon;和2019 Silverado LD和Sierra Limited Models可能具有制动器的制动脉动或磨削声音。在检查期间，可能会发现不均匀的前刹车片磨损。
Typically, vehicles with these conditions have low mileage, approximately 10,000 miles (16,000 km), and the inner pad on either the front-left side or front-right side has extremely biased wear.
不均匀的刹车垫磨损包括以下内容：
- Inboard to outboard brake pad wear difference of 3 mm (0.118 in.) or greater for ‘normal’ highway driving with no heavy loads, without trailer towing, and without frequent elevation changes
- 舷外刹车片磨损差异为6毫米（0.236英寸）或更大的重型城市驾驶，频繁的高度变化，频繁的拖车牵引和重负荷
- 左右内侧到舷内或左右外侧到外侧制动器垫磨损差3 mm（0.118英寸）或更大的驾驶条件
例如,垫磨损不均可能涉及一个完整ely worn inner pad while the outer pad still had plenty of pad life (Fig. 13, #1) on one side of the axle while the brake pads on the opposite side may both have plenty of pad material left. (Fig. 13, #2)
Fig. 13
小费：如果摩擦表面磨损到2.0mm（0.079英寸）的安装板内，则只能更换盘式制动垫。
制动系统检查提示
- 请勿使用任何空气工具拆卸或安装制动钳螺万博下载手机客户端栓。仅使用手动工具。万博下载手机客户端
- 安装开口扳手将卡钳引导销牢入制动钳，同时卸下或安装制动钳螺丝螺栓。不要让开口扳手与制动钳接触。
- When compressing the caliper pistons, use large C-clamps over the top of the caliper housing and against the back of the outboard pad. Slowly tighten the C-clamps until the pistons are pushed completely into the caliper bores. Using this method will help determine if there is anything binding.
- 检查和测量制动衬块厚度。确定驱动器的类型，并将测量结果与正常或重型驱动（3mm或6mm）进行比较。
如果焊盘在规格内，请执行正常制动修复。如果焊盘超出规格，请根据适当的服务信息执行诊断以确定关注的原因（卡钳活塞绑定，括号中的绑定垫或导销，制动软管限制等）
- 如果找不到不均匀焊盘磨损的原因，请将前刹车片更换在公告中列出的部件号＃19-NA-116。如果制动器转子由于过度的热检查/蓝色需要服务，建议更换转子，而不是试图改善它们。请参阅正确的铁素体硝基渗碳（FNC）转子的零件目录。
- After repairs and pad burnishing have been completed, test drive the vehicle for 20–30 miles (32–48 km) on an open road at cruising speeds of 55+ mph (88.5+ km/h) where very little braking is actually performed.
- 从测试驱动器返回后，立即将车辆抬起在起重机上并用手旋转两个前轮。如果滚轮难以旋转，则它可能是制动拖动的指示。
- 通过存在的条件，执行诊断以确定阻力的原因（支架中的卡钳活塞绑定，装订垫或销，制动软管限制等）。如有必要，修复并重新评估车辆。
For additional information, refer to Bulletin #19-NA-116.
– Thanks to Bob Hartman and Hassan Abdallah
