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Service bulletin 08-06-04-012B

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 id10026627
Published by NHTSA2008-11-20
Manufacturer's number08-06-04-012B
Manufacturer's date2008-11-19
NHTSA componentENGINE AND ENGINE COOLING:ENGINE; VEHICLE SPEED CONTROL:ACCELERATOR PEDAL

NHTSA's summary

GMC: EI08047-INTERMITTENT MIL/SES, DTC(S) P2120, 02122, 02123, 02125, P2127, P2128, P2138 WITH REDUCED ENGINE POWER (REPLACE ACCELERATOR PEDAL). THIS MAY BE CAUSED BY CORROSION AT THE ACCELERATOR PEDAL CONNECTOR. *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

Engine, Throttle and cruise control

Trouble codes named

P2120, P2127, P2128, P2138

Vehicles listed
CADILLAC ESCALADE2007
CADILLAC ESCALADE ESV2007 (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET SUBURBAN2007
CHEVROLET TAHOE2007
GMC YUKON2007
GMC YUKON DENALI2007 (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
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04-06-04-051J2024-10-31. Service bulletin. This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
09-06-04-026Y2024-09-05. Service bulletin. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
01-06-01-011P2024-09-05. Service bulletin. This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
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