# Service bulletin 3857

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: 10019211
- Published by NHTSA: 2006\-02\-21
- Manufacturer's number: 3857
- NHTSA component: ENGINE AND ENGINE COOLING:COOLING SYSTEM

## NHTSA's summary

SUPPLEMENT TO BULLETIN 05\-01\-37\-002A, POOR REAR HEAT PERFORMANCE . \*AK

## 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

- 2003 to 2006 CHEVROLET TRAILBLAZER
- 2003 GMC DENALI
- 2003 to 2006 GMC ENVOY

## Other bulletins for the same vehicles and component

- [PIT3116B](/bulletins/10176314.md), 2020-06-15, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM. This Preliminary information communicates information to Clean the throttle body if the engine stalls at idle when the A/C comes on.
- [3637](/bulletins/10018538.md), 2006-01-06, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN. EV COOLING FAN NOISE CHARACTERISTICS \- DO NOT REPLACE EV FAN. \*TT
- [3077](/bulletins/10009677.md), 2004-10-15, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN. TICK NOISE AT IDLE. \*TT
- [01676](/bulletins/10007188.md), 2004-06-03, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN. 4.2 4L60E ENGINE COOLING FAN CONTACTS SHROUD AFTER REPLACING RADIATOR. \*MR
- [01578](/bulletins/10005421.md), 2004-02-25, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN. COOLING FAN OPERATION. SIT BULLETIN 1413381. \*TT
- [0810B](/bulletins/10005383.md), 2004-02-24, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN. TICK NOISE AT IDLE. \*TT
- [012103](/bulletins/10005095.md), 2004-01-30, Service bulletin: ENGINE AND ENGINE COOLING:COOLING SYSTEM. ENGINE OVERHEAT CONDITION WITH LITTLE OR NO HEATER OUTPUT. OASIS \*TT

JSON: [/v1/bulletins/10019211](/v1/bulletins/10019211)

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