NHTSA ID Number: 10140339
Manufacturer Communication Number: PI1086B
Summary
This preliminary information bulletin provides a procedure to replace the shifter handle knob due to the knob being cracked and/or will not operate while shifting out of park.
Condition/Concern
Some customers may comment on the shifter handle knob being cracked and/or will not operate while shifting out of Park.
This condition may occur if the chrome knob on the shifter handle cracks, not allowing the shifter to engage into gear.
Recommendation/Instructions
Replace the chrome shifter knob with the shifter handle knob kit that is now available. DO NOT replace the transmission shifter control for this condition.
Follow the procedure below for installing the new shifter handle knob kit:
Parts
| Description | Part Number |
| KNOB KIT-A/TRNS CONT LVR | 42423234
General Motors 42423234 - Knob Kit
Last update on 2026-06-17 / Affiliate links / Images from Amazon Product Advertising API |
| KNOB PKG A/TRNS CONT LVR (RS Models Only) | 95393166 |
SEOCONTENT-START
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Bulletin No.: PI1086B
Date: Nov-2017
| Subject: | Shifter Handle Knob Cracked and/or Will Not Operate While Shifting Out of Park |
| Models: | 2012-2014 Chevrolet |
Condition/Concern
Some customers may comment on the shifter handle knob being cracked and/or will not operate while shifting out of Park.
This condition may occur if the chrome knob on the shifter handle cracks, not allowing the shifter to engage into gear.
Recommendation/Instructions
Replace the chrome shifter knob with the shifter handle knob kit that is now available. DO NOT replace the transmission shifter control for this condition.
Follow the procedure below for installing the new shifter handle knob kit:

- Using a trim tool, remove the cover that is located on the top of the shifter handle as shown in the illustration above.

- Using the same trim tool, remove the cover that is located on the side of the shifter handle as shown in the illustration above.

- Remove the pin located under the chrome knob as shown in the illustration above.

- Push down on the white plastic adapter as shown in the illustration above, which will reduce tension on the knob, and remove.

- Push down on the white plastic adapter and slide the new knob in until the spring is locked in the slot on the knob as shown in the illustration above.
- Install the new pin and covers.
Parts Information
| Part Number | Description |
| 42423234
General Motors 42423234 - Knob Kit
Last update on 2026-06-17 / Affiliate links / Images from Amazon Product Advertising API |
KNOB KIT-A/TRNS CONT LVR |
| 95393166 | KNOB PKG A/TRNS CONT LVR (RS Models Only) |
Warranty Information
For vehicles repaired under the U.S. (3 years/36,000 miles) or Canadian (3 years/60,000 km) Bumper-to-Bumper Warranty, use:
| Labor Operation | Description | Labor Time |
| 8480038* | Shifter Handle Knob Kit Replacement | 0.4 hr |
| *This is a unique Labor Operation for Bulletin use only. It will not be published in the Labor Time Guide. | ||
SEOCONTENT-END
5 Affected Products
Vehicle
| MAKE | MODEL | YEAR |
| CHEVROLET | SONIC | 2012-2016 |
1 Associated Document
Manufacturer Communications
Bulletin No.: PI1086B
Date: Nov-2017
MC-10140339-9999.pdf 1585.404KB
NHTSA ID Number: 10201123
Manufacturer Communication Number: PI1086A
Summary
Shifter handle knob cracked and/or will not operate while shifting out of park
1 Associated Document
Manufacturer Communications
Bulletin No.: PI1086A
Date: Dec-2015
MC-10201123-9999.pdf 1582.324KB
NHTSA ID Number: 10073474
Manufacturer Communication Number: PI1086
Summary
SUMMARY TO BE PROVIDED ON A FUTURE DATE.
1 Associated Document
Service Bulletin Document
Bulletin No.: PI1086
Date: October, 2013
SB-10073474-5448.pdf 3719.038KB
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