Is your defective GMC Yukon actually a LEMON?

Find out in 30 SECONDS or less if it qualifies for a REFUND or a CASH SETTLEMENT.

TSB Document:

Affected Component: ELECTRICAL SYSTEM

Summary
This Preliminary information communicates During inspection of the vehicle for an unrelated concern the technician may notice that one or more of the following Cylinder Deactivation Performance DTC(s) P3498, P3499, P349A, P349B, P349C, P349D, P349E, or P349F may be set in history. and not requesting MIL.  If any of these DTCs are requesting the MIL, please follow appropriate service information for diagnosis & repair.  This condition may be caused by the ECM hardware disabling the cylinder deactivation outputs for an ignition cycle due to low voltage transient during crank & inadvertently causing one of the DTCs to set during an ignition cycle. 

Click a tab for more information.

Date Published
JUN 10, 2020
NHTSA TSB #
10178319
Find something helpful? Spread the word.

Become a Fan & Spread the Word