MACK 2018-2022: ELECTRONIC STABILITY CONTROL (ESC):CONTROL MODULE:SOFTWARE

Mack Trucks, Inc. (Mack) is recalling certain 2018-2022 Anthem (AN), Granite (GR/GU), and Pinnacle (CHU/CXU/PI) vehicles equipped with "camelback" rear suspension and electronic s…

Recall #: 21V233000

Compiled from official public sources by the publisher. · Updated September 2026

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Mack recalled Mack Trucks, Inc. (Mack) is recalling certain 2018-2022 Anthem (AN), Granite (GR/GU), and….

MACK 2018-2022: ELECTRONIC STABILITY CONTROL (ESC):CONTROL MODULE:SOFTWARE was recalled by Mack in April 1, 2021. Reason: Mack Trucks, Inc. (Mack) is recalling certain 2018-2022 Anthem (AN), Granite (GR/GU), and Pinnacle (CHU/CXU/P…. Remedy: Mack will notify owners, and dealers will reprogram the vehicle control units, free of ch…. Verify recall #21V233000 with the NHTSA before acting.

The recall

Mack issued this NHTSA recall-Mack Trucks, Inc. (Mack) is recalling certain 2018-2022 Anthem (AN), Granite (GR/GU), and Pinnacle (CHU/CXU/P….

None
agency class: April 1, 2021
reported

Sourced from official NHTSA enforcement records. Verify recall #21V233000 with the agency before acting. Full product description, hazard, remedy, and related recalls are below.

Recall Insight

The number of affected units is not disclosed in the agency filing, which is common for drug and food recalls where lot-level tracking supersedes unit counts. Distribution scope (see Distribution below) directly affects the consumer exposure window and determines whether a recall remains regional or escalates into a nationwide advisory. Consumers holding this product should act on the agency's documented remedy above rather than relying on general guidance.

Within the same product category the archive holds 6 closely related recalls, 3 from NHTSA - clustering in a narrow category often points to a systemic quality-control or supplier issue rather than a one-off defect. Always verify the recall number against the official agency record before acting.

Product description

Mack Trucks, Inc. (Mack) is recalling certain 2018-2022 Anthem (AN), Granite (GR/GU), and Pinnacle (CHU/CXU/PI) vehicles equipped with "camelback" rear suspension and electronic stability control. The vehicles may not stay in their lane at certain speeds. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 136, "Electronic Stability Control Systems on Heavy Vehicles."

Reason for recall

Hazard

A vehicle that drifts out of its lane increases the risk of a crash.

Remedy, what to do

Mack will notify owners, and dealers will reprogram the vehicle control units, free of charge. The recall began on April 21, 2021. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0423.

Recall Profile

Structured summary of the NHTSA recall record
Attribute	Value
Agency	National Highway Traffic Safety Administration
Severity class	Not classified by agency
Status	Active
Recall number	21V233000
Date reported	April 1, 2021
Date initiated	April 1, 2021
Recalling firm	Mack
Affected scope	Not disclosed
Distribution	United States
Official source	NHTSA notice →

Profile values are sourced directly from the official NHTSA enforcement record. Source: National Highway Traffic Safety Administration.

What to do with this recall

Mack will notify owners, and dealers will reprogram the vehicle control units, free of charge. The recall began on April 21, 202…

Check the recall number (21V233000) and product description against the item you own. Search the archive
Confirm the current status and remedy on the official NHTSA notice before acting. NHTSA notice
Follow the documented remedy (refund, replacement, repair, or disposal) rather than general advice. What to do next

This page summarizes the official NHTSA record for research and awareness; it is not legal, medical, or safety advice. Verify with the issuing agency before acting.

Frequently Asked Questions

What product was recalled? ▼

Why was this product recalled? ▼

What should consumers do? ▼

Which agency issued this recall? ▼

This recall was issued by the NHTSA on April 1, 2021. NHTSA does not publish a hazard classification for this recall. Recall number: 21V233000.

Where was the recalled product distributed? ▼

Distribution: United States.

How do I report an injury from a recalled product? ▼

Report injuries to the issuing agency: CPSC at SaferProducts.gov, NHTSA at nhtsa.gov/report-a-safety-problem, or FDA via MedWatch. Document the product (photos, model/serial numbers, purchase receipts) and seek medical attention. Injury reports help agencies track hazard patterns and may strengthen enforcement actions.

Nationwide recalls with similar severity or category timing

Vehicle and equipment notices outside this manufacturer and filing state, matched by archive severity grade and report timing.

Similar severity · nearest report date

Same archive severity grade, closest by report date among other firms and states.

Rong Shing Trading Inc. Recalls Ineligibl… 2021-04-01 INTERNATIONAL 2021: PARKING BRAKE 2021-04-01 INTERNATIONAL 2021: SERVICE BRAKES, AIR 2021-04-01 MERCEDES-BENZ 2017-2018: STEERING 2021-04-01

Similar Vehicles · nearest report date

Same product category, closest by report date among other firms and states (deduped against the severity set).

MERCEDES-BENZ 2021: SEATS 2021-04-01 MERCEDES-BENZ 2021: STRUCTURE:BODY:TAILGA… 2021-04-01 PORSCHE 2021: SUSPENSION:FRONT:SHOCK ABSO… 2021-03-31 ALFA ROMEO 2021: AIR BAGS:SIDE/WINDOW:CUR… 2021-03-30

Compare this recall with KTM North America Recalls Off-Road Motorcycles Due to Risk … → · All Vehicles recalls

This recall: NHTSA, reported April 1, 2021. Severity classes follow each agency's own taxonomy; related-recall context is computed across the full archive.

Methodology · Corrections · Archive as of August 2026