Timing Chain Upper Guide – GM (55573867)

Timing Chain Upper Guide transmits drive at a fixed ratio and is matched to its shaft by tooth count and spline. A single tooth difference changes the ratio and surfaces as a speedometer error or a shift complaint.

Replace the Timing Chain Guide when tooth faces show pitting, when a whine rises with road speed, or when there is metal in the fluid. Gears wear as a set, so replacing half of one usually brings the noise back.

Ordering reference for the Timing Chain Guide is part number 55573867, categorised under Camshafts & Timing. Match that number against the component you are removing before you order.

Genuine GM part for the Timing Chain Guide. Where the manufacturer has superseded a number, the current reference is the one that ships.

The listing covers the upper position of the assembly.