Conditions for Setting the DTC
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
B2508 02
Before the heated seats are activated, the HSM detects a short to ground on the seat heating element supply voltage circuit or control circuit.
B2508 01
Before the heated seats are activated, the HSM detects a short to battery voltage on the seat heating element supply voltage circuit or control circuit.