# Service bulletin SB\-08\-07\-30\-021

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.

- Type: Service bulletin
- NHTSA id: 10025668
- Published by NHTSA: 2008\-08\-28
- Manufacturer's number: SB\-08\-07\-30\-021
- Manufacturer's date: 2010\-06\-01
- Replaces: SB\-08\-07\-30\-021E
- NHTSA component: LATCHES/LOCKS/LINKAGES:DOORS:LATCH; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL; ENGINE AND ENGINE COOLING:ENGINE; POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)

## NHTSA's summary

LOSS OF HIGH SPEED GMLAN COMMUNICATIONS, INTERMITTENT NO CRANK, IPC GAUGE FLUCTUATION, INTERMITTENT DOOR LOCK CYCLING, TRANSMISSION MAY NOT SHIFT, DTCS U0073, U0100, U0101, U0102, U0121, U0140 SET \(REPAIR BACKED OUT TERMINAL IN TRANSMISSION HARNESS CONNECTOR\). VEHICLES WITH 6 SPEED 6L80 \(RPO MYC\), 6L90 \(RPO MYD\) OR HYBRID TWO MODE 2M70 AUTOMATIC. INCLUDING 2008 TAHOE AND YUKON HYBRID MODELS. \*PE UPDATED 3/28/11. INCLUDING SIERRA, SILVERADO AND ESCALADE HYBRIDS. \*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

Electrical system, Engine, Latches and locks, Transmission and driveline, Automatic transmission, Door latch, Instrument cluster, Transmission control module

## Trouble codes named

U0073, U0100, U0101, U0102, U0121, U0140

## Vehicles listed

- 2007 to 2008 CADILLAC ESCALADE
- 2007 to 2008 CADILLAC ESCALADE ESV
- 2007 to 2008 CADILLAC ESCALADE EXT
- 2007 to 2008 CADILLAC XLR
- 2007 to 2008 CHEVROLET CORVETTE
- 2007 to 2008 CHEVROLET SILVERADO
- 2007 to 2008 CHEVROLET SUBURBAN
- 2007 to 2008 CHEVROLET TAHOE
- 2007 to 2008 GMC SIERRA
- 2007 to 2008 GMC YUKON
- 2007 to 2008 GMC YUKON DENALI
- 2007 to 2008 GMC YUKON DENALI XL
- 2007 to 2008 GMC YUKON XL
- 2007 to 2008 GMC YUKON XL 1500
- 2007 to 2008 GMC YUKON XL 2500

## Other bulletins for the same vehicles and component

- [PIT5208](/bulletins/10247765.md), 2023-12-26, Service bulletin: ELECTRICAL SYSTEM:INSTRUMENT PANEL:FUEL GAUGE. Fuel Gauge Shows Empty After Refueling And DTC P2636.
- [PIT5195B](/bulletins/10247748.md), 2023-12-26, Service bulletin: ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER. Speedometer Needle Accuracy Information.
- [PIT5195](/bulletins/10247747.md), 2023-12-26, Service bulletin: ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER. Speedometer Needle Accuracy Information
- [PIT5208](/bulletins/10247110.md), 2023-12-11, Service bulletin: ELECTRICAL SYSTEM:INSTRUMENT PANEL:FUEL GAUGE. Fuel Gauge Shows Empty After Refueling And DTC P2636.
- [PIT5195B](/bulletins/10247093.md), 2023-12-11, Service bulletin: ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER. Speedometer Needle Accuracy Information.
- [PIT5195](/bulletins/10247092.md), 2023-12-11, Service bulletin: ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER. Speedometer Needle Accuracy Information
- [07\-08\-49\-020R](/bulletins/10244214.md), 2023-10-18, Service bulletin: ELECTRICAL SYSTEM; EQUIPMENT; ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER. This informational bulletin provides information for the IPC odometer programming method quick reference guide.
- [16\-NA\-130](/bulletins/10232711.md), 2023-03-08, Service bulletin: POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY. This service bulletin provides information for after installation of a replacement upper valve body, the transmission may have no Reverse and no 2nd gear.
- [PIT5195G](/bulletins/10213796.md), 2022-06-13, Service bulletin: ELECTRICAL SYSTEM:INSTRUMENT PANEL:SPEEDOMETER/ODOMETER. This Preliminary Information communication provides information to the technician about vehicles that the speedometer needle appears to be inaccurate. Dealer should advise the customer the specification for speedometer needle accuracy is \+/\- 2 MPH at any given speed when looking straight at the needle.
- [06\-00\-89\-031D](/bulletins/10201098.md), 2021-09-07, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION; POWER TRAIN; ENGINE. OEM and Remanufactured Engine and Automatic Transmission/Transaxle Identification

JSON: [/v1/bulletins/10025668](/v1/bulletins/10025668)

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