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Gmc K35 Side Marker Lights

Gmc K35 Side marker lights

Side marker lights for your Gmc K35 start at $4.95, with 2 options in stock from TYC. Side marker lights are small amber or red lamps mounted on the front and rear corners of the vehicle that make it visible to drivers approaching from the side, especially at night or in low visibility. A burned-out or cracked marker light is a failed safety item and a citable equipment violation in most states.

Signs your Gmc K35 needs a new side marker light

  • The side marker bulb is visibly burned out — no light is emitted when headlights or parking lights are on
  • The lens is cracked, yellowed, or broken, allowing moisture inside the housing and accelerating bulb failure
  • Water or condensation is visible inside the lens, pointing to a failed seal that will corrode the socket
  • The marker light flickers when driving over bumps, indicating a loose bulb, corroded socket, or broken wiring connector
  • The turn signal on the same corner blinks faster than normal, which can happen if a dual-function marker/turn bulb has failed
  • You received a fix-it ticket or failed a vehicle inspection due to a non-functioning side marker lamp

Which side marker light should you buy for your Gmc K35?

The main decision is whether you need to replace just the bulb, the complete housing assembly, or upgrade to an LED unit. Position also matters — front side markers are amber and rear side markers are red, and they are not interchangeable. Make sure the part you select matches the correct side (driver or passenger) and location (front or rear) for your Gmc K35.

OEM-replacement bulb only
Best for
Housing is intact and socket is clean; lowest-cost fix
What you get
Exact wattage and color match; direct swap in minutes with no tools on most vehicles
Complete OEM-style housing assembly
Best for
Cracked, broken, or moisture-damaged lens that can't be resealed
What you get
New lens, new bulb, and new gasket in one unit; restores factory appearance and weatherproofing
LED conversion bulb (plug-in)
Best for
Owners who want brighter output and longer bulb life without modifying wiring
What you get
Significantly brighter than incandescent; runs cooler; may require a load resistor if the vehicle monitors bulb resistance
Full LED housing assembly
Best for
Restoration builds, custom looks, or repeated bulb failures in the same housing
What you get
Integrated LED board with no replaceable bulb; longest service life; may require minor wiring adaptation

Side marker lights brands we stock for your Gmc K35

TYC
2 options · from $4.95

Replacing a side marker light on a Gmc K35

Easy⏱ 15–45 minutesFlathead screwdriver or trim removal pry toolPhillips head screwdriverNeedle-nose pliersElectrical contact cleaner and a small wire brush

On most Gmc K35 applications, the side marker housing is retained by one or two screws, a single bolt accessed from inside the wheel well, or a push-and-twist retainer that releases from behind the bumper fascia — no special tools are required. Once the housing is removed, the bulb socket twists out counterclockwise, the old bulb pulls straight out, and the new bulb seats with a firm push and a clockwise turn to lock. Reconnect the socket, verify the light illuminates with parking lights on, and reinstall the housing snugly against its gasket to maintain the weather seal.

Frequently asked questions

How much does it cost to replace side marker lights on a Gmc K35?
Parts start at $4.95 for a replacement bulb or basic housing assembly for a Gmc K35. A shop will typically charge a small labor fee on top of parts since access is straightforward on most vehicles, though labor time and cost vary. Doing it yourself is the most common approach and usually takes under 30 minutes.
Can I drive my Gmc K35 with a broken side marker light?
Technically you can drive it, but a non-functioning side marker light is an equipment violation in most U.S. states and can result in a fix-it ticket during a traffic stop or a failed safety inspection. The lamp also plays a real safety role by making your Gmc K35 visible to cross-traffic at night, so replacement is worth doing promptly.
Are side marker lights the same as turn signals on a Gmc K35?
Not always. On some Gmc K35 configurations the front side marker doubles as a turn signal and uses a dual-filament bulb to serve both functions. On others they are separate, dedicated lamps. Check whether your marker light flashes during turn signal operation — if it does, the replacement bulb must be a dual-filament type rated for both functions.
Why does my Gmc K35 side marker light keep burning out?
Repeated bulb failures on a Gmc K35 usually point to a corroded or loose socket that creates resistance and overheats the bulb, a cracked lens letting in moisture, or an incorrect replacement bulb with the wrong wattage. Inspect the socket for green corrosion, clean it with electrical contact cleaner, and verify the replacement bulb matches the OEM specification before installing.
Will an LED side marker bulb work on my Gmc K35 without any modifications?
LED bulbs are plug-in compatible on most Gmc K35 applications, but vehicles with a bulb-out monitoring system may trigger a warning light or cause rapid turn-signal blinking because LEDs draw far less current than incandescent bulbs. Installing a small inline load resistor parallel to the bulb corrects this in most cases without modifying permanent wiring.
How do I know if I need the driver side or passenger side marker light for my Gmc K35?
Stand behind your Gmc K35 facing the front of the car. The driver side is on your right and the passenger side is on your left. Product listings on AutoBuffy specify 'left' and 'right' from the perspective of sitting inside the vehicle — so driver side equals left, passenger side equals right. Confirm front versus rear position as well before ordering.

Shop side marker lights by year for the Gmc K35

19781977

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Side marker lights for other Gmc models

Gmc V2500Gmc SonomaGmc K3500Gmc C3500Gmc K15Gmc R2500