What is the low beam headlight bulb size for a 1991 GMC Jimmy?

The 1991 GMC Jimmy uses a H4703 LED bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 1991 GMC Jimmy?

The high beam bulb size for the 1991 GMC Jimmy is PC74 or PC194 or 168.

Why are my 1991 GMC Jimmy headlights dim?

Dim headlights on a 1991 GMC Jimmy can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a H4703 LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 1991 GMC Jimmy fog light?

The 1991 GMC Jimmy uses a LED Fog Light bulb for the fog light position.

Is the 1991 GMC Jimmy single or dual beam?

The 1991 GMC Jimmy uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 1991 GMC Jimmy?

Yes, the 1991 GMC Jimmy comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a H4703 LED LED conversion kit for the low beams.

Does the 1991 GMC Jimmy have fog lights?

Yes, the 1991 GMC Jimmy takes a LED Fog Light bulb for the fog light position.

Did the 1991 GMC Jimmy change headlight bulb sizes from the previous year?

No — the 1991 GMC Jimmy uses the same bulb sizes as the 1990 model. This configuration has been consistent across the 1989–1991 generation.

Is the 1991 GMC Jimmy the first or last year to use H4703 LED bulbs?

The 1991 GMC Jimmy is the last year in the 1989–1991 generation to use the H4703 LED bulb for the low beam headlight.

How do I change the headlight on a 1991 GMC Jimmy?

Turn off the vehicle and open the hood. Locate the headlight assembly from behind, remove the dust cover or retaining clip, disconnect the wiring harness, twist the old H4703 LED bulb counter-clockwise to remove it, then insert the new bulb and reassemble. The whole process typically takes 10 to 30 minutes per side depending on accessibility.

Are LED headlights legal for a 1991 GMC Jimmy?

LED bulbs used off-road or in auxiliary lights are legal everywhere. For on-road headlight use, legality varies by state. Many states allow LED retrofits as long as the beam pattern meets DOT standards. For the best legal compliance, choose a DOT-approved H4703 LED LED kit that is designed as a direct replacement and produces a proper cutoff pattern without excessive glare.

How much does it cost to replace 1991 GMC Jimmy headlights?

A pair of halogen H4703 LED bulbs costs $15 to $40, while LED conversion kits run $25 to $60 per pair. If you have a shop do the work, expect an additional $20 to $50 in labor per bulb. Replacing them yourself at home saves the labor cost and usually takes under 30 minutes.

What is the difference between halogen and LED for a 1991 GMC Jimmy?

Halogen bulbs produce a warm yellow light (around 3200K), last 500 to 1000 hours, and draw more power. LED bulbs emit a brighter white light (5000-6000K), last 25,000+ hours, and use less energy. LED upgrades for the H4703 LED position are available as direct plug-and-play replacements.

The 1991 GMC Jimmy is the last model year to use this bulb configuration (1989–1991).

Fitment Guaranteed for 1991 GMC Jimmy

What Size Bulbs Does a 1991 GMC Jimmy 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 GMC Jimmy Have?

When it comes to nighttime visibility, the 1991 GMC Jimmy relies on an arrangement of 13 specialized bulbs. It features an extensive lighting system powered by a dual-bulb halogen configuration using separate H4703 LED low beam and PC74 or PC194 or 168 high beam bulbs for precise light distribution. This model belongs to the mid years of the Jimmy's 1970-2005 production span.

Can You Put LED Bulbs in a 1991 GMC Jimmy?

For a GMC built for the road and trail, LED upgrades provide the high-contrast lighting needed for better obstacle detection. We recommend starting your upgrade with the H4703 LED low beams, as they see the most use. Adding a matching PC74 or PC194 or 168 LED kit later will complete the look and ensure consistent lighting performance. Don't forget the LED Fog Light fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

1991 GMC Jimmy Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	H4703 LED	Buy H4703 LED →
High Beam	PC74 or PC194 or 168	Buy PC74 or PC194 or 168 →
Fog Light	LED Fog Light	Buy LED Fog Light →
Brake Light	PC74 or 194 or 168	Buy PC74 or 194 or 168 →
Side Marker	194 LED	Buy 194 LED →
Turn Signal Front	2057 LED or 3057NA LED	Buy 2057 LED or 3057NA LED →
Turn Signal Rear	2057 LED	Buy 2057 LED →
Reverse Light	1156	Buy 1156 →
Dome Light	211-2	Buy 211-2 →
License Plate	67	Buy 67 →
Map Light	906	Buy 906 →
Parking Light	2057 or 194NA or 3057NA	Buy 2057 or 194NA or 3057NA →
Trunk Light	570 or 1142	Buy 570 or 1142 →

How do the 1991 GMC Jimmy's bulbs compare to other years?

The 1991 GMC Jimmy uses the same bulbs as the 1990 model.

The 1992 model switched to a different bulb configuration.

This bulb configuration covers the 1989–1991 model years. ← 1990 1992 →

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Other Jimmy Years

2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1990 1989 1988 1987 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1972 1971 1970

Other Vehicles That Use H4703 LED Bulbs

1993 Chrysler Imperial 1993 Chrysler New Yorker 1990 Jeep Wagoneer