# Service bulletin 020604005

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: 629487
- Published by NHTSA: 2002\-04\-02
- Manufacturer's number: 020604005
- Manufacturer's date: 2002\-02\-01
- NHTSA component: ELECTRICAL SYSTEM:IGNITION:MODULE

## NHTSA's summary

SUBJECT REGARDING REVISED DIAGNOSTIC TROUBLE CODE P1221 SERVIC EMANUAL UDPATE. \*TT

## 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, Ignition

## Trouble codes named

P1221

## Vehicles listed

- 2001 to 2002 CHEVROLET CORVETTE
- 2001 CHEVROLET SILVERADO
- 2001 CHEVROLET SUBURBAN

## Other bulletins for the same vehicles and component

- [05500](/bulletins/10250046.md), 2024-02-12, Service bulletin: ELECTRICAL SYSTEM:IGNITION; ELECTRICAL SYSTEM. 05500 IGNITION DISTRIBUTOR SYSTEM CORROSION INSPECT / REPLACE
- [05500](/bulletins/10066123.md), 2016-05-19, Service bulletin: ELECTRICAL SYSTEM:IGNITION. SUMMARY TO BE PROVIDED ON A FUTURE DATE.
- [05500](/bulletins/10017550.md), 2005-11-10, Service bulletin: ELECTRICAL SYSTEM:IGNITION. THE IGNITION DISTRIBUTOR CAP AND ROTOR MAY CORRODE AND CAUSE IGNITION SYSTEM FAILURE. A PRODUCT EMISSION RECALL TO INSPECT / REPLACE THE DISTRIBUTOR IGNITION SYSTEM. \*TT GM PARTS BULLETINS \& INFORMATION. \*TT
- [040604039](/bulletins/10012154.md), 2005-02-16, Service bulletin: ELECTRICAL SYSTEM:IGNITION. REVISED IGNITION RELAY DIAGNOSIS. \*TT
- [020604030](/bulletins/634778.md), 2002-10-09, Service bulletin: ELECTRICAL SYSTEM:IGNITION:MODULE. SUBJECT REGARDING REVISED DIAGNOSTIC TROUBLE CODE P0087 TABLE. \*TT
- [020604032](/bulletins/634774.md), 2002-10-09, Service bulletin: ELECTRICAL SYSTEM:IGNITION:MODULE. THIS BULLETIN IS BEING ISSUED TO REVISE THE DIAGNOSTIC TROUBLE CODE P0088. \*TT

JSON: [/v1/bulletins/629487](/v1/bulletins/629487)

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