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Service bulletin PIP4525D

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 id10113163
Published by NHTSA2017-08-15
Manufacturer's numberPIP4525D
Manufacturer's date2013-07-30
NHTSA componentELECTRICAL SYSTEM; ELECTRICAL SYSTEM:WIRING

NHTSA's summary

This Preliminary Information communication provides information to the technician about vehicles that have an engine misfire, oil consumption, and/or a Service Engine Soon Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Code P0300 and or P0301. Technician will need to inspect all of the spark plugs for oil fouling and cracks around the electrode porcelain. Technician will replace the spark plug if it is found cracked. If the #1 spark plug is the only spark plug that is oil fouled and the electrode porcelain is not cracked, inspect the related valve seals to ensure that they are not damaged or missing, and repair as necessary. If the valve seals are fine, inspect the number 1 cam bearing for possible cause of this concern. Replace the bearing if needed. If the cam bearing has spun the engine will need to be replaced.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Wiring and fuses

Trouble codes named

P0300, P0301

Vehicles listed
CADILLAC ESCALADE2009
CADILLAC ESCALADE ESV2009 (the catalog's model; the bulletin names a series or trim of it)
CADILLAC ESCALADE EXT2009 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 15002008, 2009 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SILVERADO 25002008, 2009 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET TAHOE2008, 2009
GMC SIERRA 25002008, 2009 (the catalog's model; the bulletin names a series or trim of it)
GMC SIERRA DENALI2008, 2009 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON2008, 2009
GMC YUKON DENALI2008, 2009 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON DENALI XL2008, 2009 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON XL2008, 2009

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
1300890082023-12-11. Service bulletin. GM Wiring Repair Strategy Information
100089005G2019-05-13. Service bulletin. This warranty admin bulletin explains to the technician additional information may be needed when submitting transactions when doing wiring repairs.
100089005H2019-03-18. Service bulletin. This warranty admin bulletin explains to the technician additional information may be needed when submitting transactions when doing wiring repairs.
PIP4374C2019-03-18. Service bulletin. This Preliminary Information communication provides information to the technician on were to look for a Possible Chaffed Wire. This could cause service engine soon light comes on and the vehicle is a no start.
10-00-89-005C2018-06-04. Service bulletin. This informational bulletin is a revision for 10-00-89-005B to add the 2014 model year and labor codes.
10-00-89-005E2018-05-21. Service bulletin. This warranty administration bulletin adds the 2016 model year to a communication which provides dealership personnel revised wiring repair labor operations and required additional information.
13-00-89-008A2018-05-07. Service bulletin. This informational bulletin communicates GM wiring repair strategy information.
13-08-116-0012018-04-16. Service bulletin. This technical bulletin provides a procedure on suspected tampering due to aftermarket ALDL or DLC interface devices causing multiple issues.
13-00-89-0082018-04-02. Service bulletin. This informational bulletin provides information for GM wiring repair.
100089005D2017-12-22. Service bulletin. This warranty informational bulletin advised the technician that when performing a wiring repair, more information is required.