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Service bulletin PIT-4858

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 id10030125
Published by NHTSA2009-08-06
Manufacturer's numberPIT-4858
Manufacturer's date2011-05-01
ReplacesPIT-4858A
NHTSA componentSERVICE BRAKES, ELECTRIC

NHTSA's summary

GENERAL MOTORS: HYBRID BRAKE NOISE OR VIBRATION. BRAKES GROAN OR THUMP NOISES DURING BRAKING; BRAKE PEDAL PUSHBACK OR VIBRATION THAT MAY RESEMBLE A PULSATION AS THE VEHICLE COMES TO A STOP; A SLIGHT DROP IN THE BRAKE PEDAL WHEN COMING TO A STOP. *PE UPDATED 6/27/11. *PE

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

Brakes

Vehicles listed
CADILLAC ESCALADE HYBRID2009 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO2009, 2010, 2011
CHEVROLET TAHOE HYBRID2008 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA HYBRID2009 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON HYBRID2008 (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.

Other bulletins for the same vehicles and component
21-NA-0432025-02-12. Service bulletin. This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
21-NA-0432024-12-10. Service bulletin. This bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
PIP5596A2024-04-15. Service bulletin. This Preliminary information communicates that when removing the fuel line jumper hose care should be taken to be sure the line is reinstalled correctly to avoid a no/low fuel pressure situation.
PIT5120A2023-12-26. Service bulletin. Stabilitrak/Traction Control OFF With Red Brake Warning Lamp
PIT5005A2023-12-26. Service bulletin. Diagnostic Tip - Service Trailer Brake Message And Unable To Clear DTCs
PIT4729E2023-12-26. Service bulletin. Adding Integrated Trailer Brake Controller RPO JL1.
PIT5161B2023-12-11. Service bulletin. Bump Feel Or Clunk Noise After A Stop.
PIT4729E2023-11-20. Service bulletin. Adding Integrated Trailer Brake Controller RPO JL1.
23-NA-1442023-09-15. Service bulletin. This technical bulletin provides information and a solution to a condition of Brake Pedal Moves or Self Applies at Full Turns.
PIT3665L2022-11-21. Service bulletin. This Preliminary Information communication advises the technician that the Hydro-Boost is not serviceable and will need to be replaced if the brake pedal moves or applies on its own at a full turn.