# Service bulletin 990309003

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: 6088678
- Published by NHTSA: 1999\-12\-29
- Manufacturer's number: 990309003
- Manufacturer's date: 1999\-10\-01
- NHTSA component: SUSPENSION

## NHTSA's summary

VEHICLES WITH 4L60\-E AUTOMATIC TRANSMISSIONS MAY EXHIBIT VIBRATION DURING ACCELERATION FROM 0 \- 40 KM/H \(0\-25 MPH\). \*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

Suspension

## Vehicles listed

- 1999 CHEVROLET SIERRA
- 1999 CHEVROLET SILVERADO
- 1999 CHEVROLET SILVERADO 1500
- 1999 GMC SIERRA
- 1999 GMC SIERRA 1500
- 1999 GMC SILVERADO

## Other bulletins for the same vehicles and component

- [060309004N](/bulletins/10168206.md), 2019-11-25, Service bulletin: SUSPENSION:FRONT:SPRINGS:LEAF SPRING ASSEMBLY. This technical bulletin provides a procedure to apply grease to the leaf springs to correct a condition of a squeak noise from the metals making contact.
- [060309004J](/bulletins/10159573.md), 2019-05-13, Service bulletin: SUSPENSION. This technical bulletin provides a procedure to apply grease to the leaf springs to correct a condition of a squeak noise from the metals making contact.
- [PIT3098G](/bulletins/10156947.md), 2019-04-08, Service bulletin: SUSPENSION. This Preliminary Information communication provides information to the technician about vehicles that have a lean to the left or right. Technician will need to measure fender wheel\-opening heights, front and rear, to quantify vehicle lean. Fender wheel\-opening heights are related to, but distinct from, trim height. The front wheel\-opening height is known as P height, and the rear wheel\-opening height is known as R height. Adjust and heights that are out of specification. After all adjustments are done, perform a front\-end alignment and check headlight aim.
- [06\-03\-09\-004F](/bulletins/10150643.md), 2018-12-10, Service bulletin: SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY. This technical bulletin provides a procedure to add a lubricant to the rear leaf springs to correct the customers concern of a squeaking noise from the rear suspension.
- [06\-03\-09\-004F](/bulletins/10142238.md), 2018-06-25, Service bulletin: SUSPENSION. This technical bulletin provides a procedure to add a lubricant to the rear leaf springs to correct the customers concern of a squeaking noise from the rear suspension.
- [060309004K](/bulletins/10139210.md), 2018-06-04, Service bulletin: SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY; SUSPENSION:FRONT:SPRINGS:LEAF SPRING ASSEMBLY. This technical bulletin provides a procedure to apply grease to the leaf springs to correct a condition of a squeak noise from the metals making contact.
- [06\-03\-09\-004E](/bulletins/10139020.md), 2018-06-04, Service bulletin: SUSPENSION:FRONT:SPRINGS:LEAF SPRING ASSEMBLY. This informational bulletin provides information for Squeak Noise from Rear of Vehicle Condition.
- [06\-03\-09\-004F](/bulletins/10137817.md), 2018-05-21, Service bulletin: SUSPENSION:REAR; SUSPENSION:REAR:SPRINGS:LEAF SPRING ASSEMBLY; SUSPENSION. This technical bulletin provides a procedure to add a lubricant to the rear leaf springs to correct the customers concern of a squeaking noise from the rear suspension.
- [PI02003D](/bulletins/10135368.md), 2018-05-07, Service bulletin: SUSPENSION. This preliminary informational bulletin provides technicians a recommendation for when they are performing a front end alignment and find an alignment dowel pin missing .
- [PIT3098E](/bulletins/10114776.md), 2017-08-15, Service bulletin: STRUCTURE:FRAME AND MEMBERS; SUSPENSION; EXTERIOR LIGHTING:HEADLIGHTS. This Preliminary Information communication provides information to the technician about vehicles that have a lean to the left or right. Technician will need to measure fender wheel\-opening heights, front and rear, to quantify vehicle lean. Fender wheel\-opening heights are related to, but distinct from, trim height. The front wheel\-opening height is known as P height, and the rear wheel\-opening height is known as R height. Adjust and heights that are out of specification. After all adjustments are done, perform a front\-end alignment and check headlight aim.

JSON: [/v1/bulletins/6088678](/v1/bulletins/6088678)

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