2019 Chevrolet Malibu — Bulb Sizes (Headlight, Tail, Fog)

Quick reference

Notes:

• The 2019 Malibu spans multiple trims (L, LS, RS, LT, Premier). Headlamp/tail-lamp content varies by package and market. Always confirm your housing type (halogen vs LED) before ordering.
• Where LED modules are noted, the light source is part of the assembly and not serviced as a standalone bulb.

LED vs halogen upgrade considerations

• Headlights (9012): Quality LED 9012 replacements can reduce glare and preserve cutoff if they place the LEDs correctly in the filament plane. Look for compact drivers and check dust-cap clearance. Because the Malibu often uses PWM for DRL/voltage control, choose CANBUS/PWM-compatible 9012 LEDs to prevent flicker.
• Turn signals (7440/7444): Swapping to LED will typically cause hyperflash. Use load resistors (6Ω, 50W per corner) or a BCM reprogramming solution where available. Many plug-in “CANBUS” LEDs still need external resistors on this platform.
• Tails/stop (7443): Pick dual-intensity LEDs designed for 7443 to maintain both running and brake brightness levels. Some BCMs will flag a bulb-out warning with very low-current LEDs—CANBUS styles help.
• Interior/plate/markers: T10/194 LED upgrades are straightforward. Choose non-polarity or be prepared to flip the bulb if it doesn’t light. For festoon positions, measure length (commonly 31mm) before purchasing.
• Fog lights: If your car has accessory or market-specific fogs, H11 LED upgrades are common; ensure beam control to avoid scatter.

How to replace each bulb

• Low/high beam (9012): Turn the front wheels for access. Remove the round rear dust cap on the headlamp, rotate the 9012 bulb counterclockwise, and withdraw. Avoid touching glass. Seat the new bulb fully and reinstall the cap. For LED retrofits, manage the driver and wiring so the cap can close without pinching.
• DRL (LED module): The LED light pipe is part of the headlamp; replacement requires the entire assembly if inoperative.
• Front turn/side marker (7444NA/194): Access through the headlamp rear. Rotate the socket counterclockwise and pull out. Swap the wedge bulb and test before reassembly. If converting to LED, test hyperflash before buttoning up.
• Fog light (if equipped): From below the bumper or through the wheel liner, rotate the H11 socket and replace. Check aim afterward.
• Brake/tail/turn (7443/7440): Open the trunk, remove trim clips, and unbolt the tail lamp. Twist the bulb socket out of the housing. Replace with 7443 (stop/tail) and 7440A (turn) as equipped. Reinstall and test all functions.
• Rear side marker: Usually shares the tail-lamp assembly. Replace the 194 wedge in incandescent assemblies; LED versions require lamp replacement if the marker is out.
• Reverse (921): With the tail lamp removed, twist out the reverse socket and replace the 921 bulb. Verify bright output backing toward a wall.
• License plate (194): From under the deck lid, pry the lens gently, twist the socket, and swap the T10 bulb. Ensure the lens gasket is seated to keep moisture out.
• Interior map/dome (194 or festoon): Use a plastic trim tool to pop the lens. For 194, pull straight out; for festoon, spring the contacts gently and swap. Observe polarity on LEDs.

Common lighting issues for this generation

• DRL/LED strip failures: The integrated LED DRL can dim or segment; remedy is headlamp replacement. Look for moisture inside the lens—housing reseal or replacement may be needed.
• Moisture in headlamps/tails: Vent clogs or hairline cracks let water in, leading to intermittent bulbs and corrosion. Dry and reseal or replace the unit.
• Hyperflash after LED swaps: A hallmark of this BCM is sensitivity to current. Plan for resistors or BCM programming when converting turn signals.
• Socket heat damage: 7443 stop/tail sockets can discolor or loosen after years of heat. Inspect terminals and replace pigtails if the bulb fits loosely or flickers.
• Plate light corrosion: The trunk-lid harness and plate-light sockets can corrode in winter climates; clean contacts and apply dielectric grease.
• Dim/flickering aftermarket LEDs: Non-PWM-compatible bulbs may flicker with DRL/voltage modulation. Choose name-brand LEDs rated for CANBUS/PWM.

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