1979 GMC K1500 Bulb Size Chart

Bulb sizes may vary by trim, factory lighting package, region, production date, and previous modifications. Verify the bulb number on your existing bulb before buying.

Last database update: May 2026. Manual review status: Not yet manually reviewed.

Verify before buying: check the bulb number printed on your existing bulb, confirm your trim and factory lighting package, and review the seller's fitment notes.

Disclosure: We may earn a commission from links marked Affiliate. Unmarked retailer links may be plain search links. Always verify bulb fitment before purchasing.

1979 GMC K1500 Bulb Size Chart

Position	Bulb Code	Aliases	Trim / Package	Factory Type	Confidence	Review	Notes	Shop
Low Beam	H6024	—	Standard listing	Halogen	High	Pending	Dual-beam bulb; verify factory housing and lighting package.	Amazon
Turn Signal Front	1157A	—	Standard listing	Halogen	High	Pending	Verify trim, factory lighting package, and the bulb number on the existing bulb.	Amazon
Side Marker	168	—	Standard listing	Halogen	Medium	Pending	Verify trim, factory lighting package, and the bulb number on the existing bulb.	Amazon
Brake Light	1157	—	Standard listing	Halogen	High	Pending	Verify trim, factory lighting package, and the bulb number on the existing bulb.	Amazon
Turn Signal Rear	1157	—	Standard listing	Halogen	High	Pending	Verify trim, factory lighting package, and the bulb number on the existing bulb.	Amazon
Tail Light	1157	—	Standard listing	Halogen	High	Pending	Verify trim, factory lighting package, and the bulb number on the existing bulb.	Amazon
Parking Light	1157A	—	Standard listing	Halogen	Medium	Pending	Verify trim, factory lighting package, and the bulb number on the existing bulb.	Amazon
Reverse Light	1156	—	Standard listing	Halogen	Medium	Pending	Verify trim, factory lighting package, and the bulb number on the existing bulb.	Amazon
High Beam	H6024	—	Standard listing	Halogen	High	Pending	Dual-beam bulb; verify factory housing and lighting package.	Amazon

1979 GMC K1500 Fitment Notes

Across the 1979-1999 production range, our database shows changes in the listed Low Beam, Fog Light, Brake Light positions. Use the chart above for this 1979 model, then confirm the bulb number in your vehicle before buying.

Known fitment limitations

factory HID or LED packages may use different parts
fog lights may depend on equipment package
aftermarket headlight assemblies may use different bulbs
regional models and production-date splits may differ

See an incorrect bulb size? Submit a correction.

How do the 1979 GMC K1500's bulbs compare to other years?

The 1980 model switched to a different bulb configuration.

This bulb configuration covers the 1979 model years. 1980 →

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Other K1500 Years

1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1985 1984 1983 1982 1981 1980

Other Vehicles That Use H6024 Bulbs

2006 Hummer H1 2006 Jeep TJ 2006 Jeep Wrangler 1998 Bentley Turbo R 1997 Land Rover Defender 90 1997 Mazda MX-5 Miata

Frequently Asked Questions

Our database lists H6024 for the 1979 GMC K1500 low beam headlights. Verify the bulb number on your existing bulb and confirm your trim or factory lighting package before buying.

Our database lists H6024 for the 1979 GMC K1500 high beam position. Some vehicles vary by trim, lighting package, or previous housing changes.

Dim headlights on a 1979 GMC K1500 can come from aging halogen bulbs, cloudy lenses, weak electrical connections, or an incorrect bulb. Confirm the listed H6024 size against the bulb in the housing before choosing a replacement or upgrade.

The 1979 GMC K1500 does not have a fog light bulb listed in our current database. If your vehicle has fog lights, verify the bulb in the housing or owner's manual before buying.

The 1979 GMC K1500 uses a single bulb (dual filament) headlight system. This means one bulb controls both high and low beams.

LED upgrades are available for many H6024 applications, but fitment, beam pattern, dashboard warnings, and road-use legality can vary. Use products that list your exact bulb family, such as H6024, and verify the factory housing before buying.

Access varies by engine bay layout and headlight housing. Before disassembly, confirm the listed H6024 low beam size on the existing bulb or owner's manual, then follow the service procedure for your exact trim.

Rules for LED headlight retrofits vary by location and by housing type. Avoid products that create glare or lack road-use compliance claims, and check local requirements before using an LED conversion on public roads.

Replacement cost depends on bulb technology, brand, and labor access. Common halogen H6024 replacements are usually cheaper than LED conversion kits. Check seller fitment notes before comparing prices.

Halogen bulbs and LED replacements differ in output, heat behavior, beam pattern, and electronics. A correct bulb code does not guarantee a correct LED beam pattern, so verify physical fit and seller compatibility notes for the 1979 GMC K1500.

1979 GMC K1500 Bulb Size Chart

1979 GMC K1500 Bulb Size Chart

1979 GMC K1500 Fitment Notes

How do the 1979 GMC K1500's bulbs compare to other years?

Other K1500 Years

More from GMC

Other Vehicles That Use H6024 Bulbs

Frequently Asked Questions

What is the low beam headlight bulb size for a 1979 GMC K1500?

What is the high beam headlight bulb size for a 1979 GMC K1500?

Why are my 1979 GMC K1500 headlights dim?

Which bulb fits the 1979 GMC K1500 fog light?

Is the 1979 GMC K1500 single or dual beam?

Can I install LED bulbs on my 1979 GMC K1500?

How do I change the headlight on a 1979 GMC K1500?

Are LED headlights legal for a 1979 GMC K1500?

How much does it cost to replace 1979 GMC K1500 headlights?

What is the difference between halogen and LED for a 1979 GMC K1500?