What Size Bulbs Does a 1991 Chevrolet W5500 Tiltmaster Use?
Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.
Installation Difficulty
Easy (Plug and Play)
Est. Replacement Cost
$15 - $40 (Halogen) / $30+ (LED)
What Lighting System Does the 1991 Chevrolet W5500 Tiltmaster Have?
The 1991 Chevrolet W5500 Tiltmaster features an extensive lighting system with 11 bulb positions. It uses halogen technology with 4000 LED low beams and 158 high beams in a dual-bulb configuration. The W5500 Tiltmaster has been available from 1988 to 2001, and the 1991 model falls in the early-generation years.
Can You Put LED Bulbs in a 1991 Chevrolet W5500 Tiltmaster?
To upgrade the 1991 Chevrolet W5500 Tiltmaster headlights to LED, you will need a 4000 LED LED kit for the low beams and a 158 LED kit for the high beams. Start with the low beams since they are used most often and have the biggest impact on nighttime visibility. For the fog lights, a LED Fog Light LED bulb provides a clean white output that pairs well with LED headlights.
How to Replace Bulbs on a 1991 Chevrolet W5500 Tiltmaster
To remove the headlight bulb, disconnect the wiring harness, then twist the bulb counter-clockwise and pull it straight out of the housing. Older model years like the 1991 W5500 Tiltmaster typically offer easy access to the headlight bulbs from behind the headlight assembly under the hood. Most owners can complete the swap in under 10 minutes per side. When installing the new bulb, avoid touching the glass with bare fingers. Skin oils create hot spots that shorten bulb life. Wear clean gloves or handle the bulb by its plastic base only. The fog lights are accessed from underneath the front bumper. You may need to remove a few plastic clips or screws from the fender liner to reach the LED Fog Light fog light socket.
Full Upgrade Bundle
Upgrade All 11 Positions at Once
1991 Chevrolet W5500 Tiltmaster Complete Bulb Size Chart
| Position | Bulb Size | Shop |
|---|---|---|
Low Beam | 4000 LED | Buy 4000 LED |
High Beam | 158 | Buy 158 |
Fog Light | LED Fog Light | Buy LED Fog Light |
Brake Light | High Mount Brake Light | Buy High Mount Brake Light |
Side Marker | 194 | Buy 194 |
Turn Signal Front | 1156 or 1073 | Buy 1156 or 1073 |
License Plate | 67 | Buy 67 |
Parking Light | 67 | Buy 67 |
Turn Signal Rear | 1156 or 1073 | Buy 1156 or 1073 |
Reverse Light | 1156 or 1073 | Buy 1156 or 1073 |
Trunk Light | LED Light | Buy LED Light |
Want to upgrade everything at once?
Shop Complete LED Kit for 1991 Chevrolet W5500 TiltmasterHow Long Do 1991 Chevrolet W5500 Tiltmaster Headlight Bulbs Last?
Standard halogen headlights on the 1991 Chevrolet W5500 Tiltmaster have an expected lifespan of 500 to 1,000 hours, which works out to roughly 2 to 3 years of normal use. Signs of a failing halogen bulb include noticeably dimmer output, a yellowish tint compared to the other headlight, or intermittent flickering. At 35 years old, the original bulbs on your W5500 Tiltmaster are likely overdue for replacement. Even if they still illuminate, reduced brightness significantly impacts nighttime safety. When one headlight burns out, replace both sides at the same time. Bulbs from the same batch age at similar rates, and mismatched brightness is distracting to oncoming drivers.
What Bulbs Are Compatible with the 1991 Chevrolet W5500 Tiltmaster?
The 4000 low beam bulb on the 1991 Chevrolet W5500 Tiltmaster is a specific fitment. There are no widely recognized cross-compatible alternatives, so make sure to purchase the exact 4000 size. Using the wrong bulb size can cause improper beam patterns that reduce your visibility and blind other drivers. It can also cause overheating inside the headlight housing, potentially warping the plastic lens or reflector. Always verify the bulb number before purchasing.
1991 Chevrolet W5500 Tiltmaster Headlight FAQ
Did Chevrolet W5500 Tiltmaster Bulb Sizes Change Over the Years?
Over its production run from 1988 to 2001, the Chevrolet W5500 Tiltmaster has seen bulb size changes in the Low Beam, High Beam and Turn Signal Front positions. The 1991 model uses the earlier bulb specification that was in place before the change around 1997. Always verify the exact bulb size for your specific 1991 model year using the chart above, as using the wrong size can result in poor fitment or reduced light output.
Other W5500 Tiltmaster Years
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Other Vehicles That Use 4000 LED Bulbs
These vehicles from other makes also use a 4000 LED low beam bulb: