# Service bulletin 3121A

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: 10009936
- Published by NHTSA: 2004\-11\-03
- Manufacturer's number: 3121A
- Manufacturer's date: 2004\-01\-01
- NHTSA component: ENGINE AND ENGINE COOLING:COOLING SYSTEM

## NHTSA's summary

EXHAUST VIBRATION RESONANCE OR MOAN 99\-05 FULL SIZE TRUCKS AND UTILITY VEHICLES WITH GEN 3 V\-8 ENGINES. \*TC

## 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, Cooling system

## Vehicles listed

- 1999 to 2005 CADILLAC ESCALADE
- 2003 to 2004 CADILLAC ESCALADE ESV
- 2002 to 2004 CADILLAC ESCALADE EXT
- 1999 to 2003 CHEVROLET SIERRA
- 1999 to 2003 CHEVROLET YUKON
- 2000 CHEVROLET YUKON XL
- 2003 to 2005 HUMMER H2
- 2004 HUMMER H2 SUT

## Other bulletins for the same vehicles and component

- [000602006](/bulletins/10012665.md), 2005-03-10, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM. DEX\-COOL ENGINE COOLANT INFORMATION. 2004 AND PRIOR PASSENGER CARS AND TRUCKS. \*TT
- [3121](/bulletins/10010248.md), 2004-11-08, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM. EXHAUST VIBRATION RESONANCE OR MOAN IN VEHICLES WITH GEN III V8 ENGINES. \*TC
- [02013](/bulletins/10007119.md), 2004-05-26, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM. COOLANT LEAK FROM HEAD CUP PLUGS ON GEN III ENGINES. \*MR
- [01339](/bulletins/10004110.md), 2003-11-19, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN. HVAC BLOWER MOTOR FAN STAYS ON IN THE HIGH BLOWER POSITION. SERVICE VME. \*TT

JSON: [/v1/bulletins/10009936](/v1/bulletins/10009936)

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