DETROIT – GM Authority has reported that General Motors has issued a technical service bulletin (TSB) concerning two separate issues potentially plaguing the calipers on some 2021 Chevrolet Express and GMC Savana full-size vans.

The two conditions covered by the TSB affect the front and rear brakes differently. Potentially improperly manufactured front calipers – out of specification clearance between pad and rotor – might allow brake drag. This could lead to accelerated pad wear as well as impacting the vehicle’s on-road driving.

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The second issue described in the TSB resulted from assembly line damage to the rear calipers. According to GM Authority, “The assembly line damage in the second issue, meanwhile, may have caused a microcrack in the rear brake caliper’s piston, which can cause the brake fluid to leak. This will also illuminate the brake malfunction indicator lamp (MIL) on the instrument panel, alerting the driver of the issue.”

Replacement of front and rear calipers, to be done at no cost to the customer, is the TSB-specified repair. Owners will be contacted by GM to bring their vans to a franchise dealer for the repair. The TSB program is in effect through Feb. 28th.