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Service bulletins for the 2021 Mack Granite

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.

225 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Only bulletins with component: Lighting are shown. Show all

Bulletins, newest first
KC-2972022-02-04. Service bulletin. EXTERIOR LIGHTING. Mack Chassis - Adding Snow Plow Lights - Parameter And Variant Changes
SC04222021-04-06. Service bulletin. ELECTRICAL SYSTEM; EXTERIOR LIGHTING; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL. Canada Non-Compliance DRL overide
KC-20622020-12-01. Service bulletin. ELECTRICAL SYSTEM; EXTERIOR LIGHTING. Mack Chassis - Granite (GR) - Intermittent Or Inoperative Headlights, Front Marker Lights, Turn Signals, And/Or Plow Lights

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.