BUICK, CHEVROLET, GMC

G-171837

2013-07-30 · NHTSA 10114189

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

Manufacturer summary

Original wording in English

12313A - Special Coverage (revised part information). The chrome layer on the balance chain pins may wear, allowing the chain to stretch. This would cause an engine noise, and if left untreated, could cause the chain to break, leading to engine damage. In addition, the fuel pump plunger shaft seal may wear and allow fuel to leak into the crankcase, setting P0172 DTC, and illuminating the Malfunction Indicator Light. This can cause engine run-on and/or the engine to run rough. If this condition occurs within the stated terms, dealers will replace the engine balance chain and fuel pump.

Repeated filings are grouped only when make, bulletin number, publication date and complete summary agree. Original record numbers are retained. Older publications remain available, and an explicit later version is shown when established. Pre-1994 vehicle associations are separated from default results; an unspecified year does not mean all model years apply.