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Service bulletin PI-0785

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 id10046339
Published by NHTSA2012-10-11
Manufacturer's numberPI-0785
Manufacturer's date2012-08-01
ReplacesPI-0785-A
NHTSA componentSERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES

NHTSA's summary

BUICK/CADILLAC/CHEVROLET/GMC: MASTER CYLINDER WAS UNBOLTED FROM BRAKE BOOSTER AT TIME OF APPLYING BRAKES WITH BRAKE PEDAL, THAT WAS LOW AND POSSIBLE CAUSE WAS SMALL VACUUM LEAK BETWEEN MASTER CYLINDER AND BRAKE BOOSTER WAS FOUND. CERTAIN MODELS 2009-2013 OF BUICK, CHEVROLET, CADILLAC, GMC. *PE UPDATED 10/15/12. *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
GMC ACADIA2009, 2010, 2011, 2012
GMC CANYON2009, 2010, 2011, 2012
GMC TERRAIN2009, 2010, 2011, 2012
GMC TOPKICK2009

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.
17-NA-2712024-12-19. Service bulletin. This service bulletin provides a procedure to clean the back side of the rims and rotors and to correct the customer concern of wheel clicking.
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.
PIT5171C2023-12-26. Service bulletin. Service Stability, Traction, ABS Rear Wheel Speed DTC Or Chassis Expansion
PIT5171B2023-12-26. Service bulletin. Service Stability Traction ABS Rear Wheel Speed.
120232002A2023-12-04. Service bulletin. Power Steering Noise or Fluid Leak from Power Steering Pump, Gear or High Pressure Pressure Hose During Extreme Low Temperature Operation (Replace Power Steering Fluid)
17-NA-2712022-11-03. Service bulletin. This bulletin provides a procedure to clean the back side of the rims and rotors and to correct the customers concern of wheel clicking.
15-00-89-004E2022-10-11. Service bulletin. This service bulletin provides technicians with updated information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
070316004D2022-06-13. Service bulletin. This service bulletin provides information for tire pressure monitoring (TPM) system concerns.