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Diagnostic Aids

WARNING: This page is about a different car, the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

If DTCs C0300 or C0305 have set, diagnose these DTCs first as they may cause DTC C0374 to set falsely. Refer to DTC C0300  or DTC C0305 .