2025 GMC Sierra EV Faces Service Update Over Suspension Alignment Issue

General Motors has issued a new service update affecting the 2025 GMC Sierra EV. The issue involves improper torque specifications for the rear lower control arm bolts, which could impact suspension performance and rear wheel alignment if left uncorrected.

Tagged under campaign N252507500, the update also applies to certain 2025 Cadillac Escalade IQ units that share the same BT1 platform.

Suspension fix requires precise torque adjustment

According to GM, the repair involves a rear wheel alignment followed by tightening four rear lower control arm bolts to 369 foot-pounds (500 Nm). No replacement parts are required, but technicians must use a high-capacity torque wrench due to the unusually high torque specification, according to GM Authority.

The update covers both customer-owned and dealer inventory units, including new, used, certified pre-owned, and demo vehicles. Dealers have been instructed not to release affected vehicles until the procedure is completed.

Update timeframe and other Sierra EV issues

The service campaign remains active until September 30, 2027. GM does not expect Sierra EV owners to schedule special visits; instead, the suspension fix will be applied during routine maintenance.

Meanwhile, some Sierra EV drivers have also reported dash warnings such as “Drive with Care,” “Reduced Acceleration,” and “Propulsion Power Reduced Due to Temperature.” GM has attributed these alerts to the battery management system designed to preserve long-term pack durability under high-stress conditions.

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