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1 Years Available

GMC I1500 Light Bulb Sizes

Complete bulb size reference for the GMC I1500 from 1966 to 1966. Find headlight, fog light, turn signal, and brake light bulb sizes for every model year.

Every GMC i1500 from 1966 to 1966 uses the same H5006 low beam bulb — once you confirm your year is within this range, you only need one part number.

Year Range

1966 – 1966

1 model years

Most Common Low Beam

H5006

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Bulb Sizes Across Years

PositionBulb Type(s)YearsStatus
High Beam
H5001(1966–1966)
1 yearsConsistent
Low Beam
H5006(1966–1966)
1 yearsConsistent

Common I1500 Replacement Parts

High Beam

H5001

Low Beam

H5006

Select Your Year

1966

H5006
10010001000 Series15015001500 Series2502500

Frequently Asked Questions

We have bulb size data for the GMC I1500 from 1966 to 1966, covering 1 model years. Select your year below for a complete position-by-position bulb chart.

No, the GMC I1500 has used the H5006 low beam bulb consistently. Any year in the 1966–1966 range uses the same bulb.

The GMC I1500 uses a H5006 bulb for the low beam and a H5001 for the high beam. Select your year below for the exact fitment chart.

Yes. The GMC I1500 uses a H5006 low beam, and direct-fit LED conversion kits for that size are widely available. LED upgrades typically produce 2–3× more light output than stock halogen and last 25,000+ hours. Look for a DOT-compliant kit with a proper beam cutoff pattern.

Select your model year from the list below. Each year page shows every bulb position — low beam, high beam, fog light, turn signal, and brake light — with the correct size and a link to buy it on Amazon.