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Service bulletin 070420002

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10022263
Published by NHTSA2007-07-24
Manufacturer's number070420002
Manufacturer's date2008-01-01
Replaces070420002A
NHTSA componentPOWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT

NHTSA's summary

REAR AXLE CLUNK AND/OR CHATTER TYPE NOISE ON TURNS (DRAIN/REFILL REAR DIFFERENTIAL FLUID). *KB UPDATED 4/11/08. *NJ

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Transmission and driveline, Differential

Vehicles listed
CADILLAC XLR2004, 2005, 2006, 2007, 2008
CHEVROLET CORVETTE2005, 2006, 2007, 2008
CHEVROLET CORVETTE Z062008 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.