ACDELCO 41803

ACDELCO part number 41803 is a spark plug in the Ignition system. This catalog matches it to 30 year-and-engine configurations from 1970 to 1996.

Verified fitment includes 1996 Hummer H1 5.7L V8 ; 1991 Avanti Ii 5.0L V8 ; 1990 Avanti Ii 5.0L 305cid V8 ; 1989 Avanti Ii 5.0L 305cid V8 ; 1988 Avanti Ii 5.0L 305cid V8 , plus 25 other configurations. See every vehicle this part fits.

Manufacturer specifications
ProfessionalDouble PlatinumPre-Set Gap: 0.043"
OE-Recommended Gap: 0.045" (IN)
Application data published for:
🇺🇸 US 🇨🇦 CA

Frequently Asked Questions

What is ACDELCO 41803?

ACDELCO part number 41803 is a spark plug with published application data for 30 vehicle configurations from 1970 to 1996. Use the manufacturer part number to cross-reference your old part or a repair quote before you order.

Which vehicles does ACDELCO 41803 fit?

This catalog matches 41803 to 30 year-and-engine configurations from 1970 to 1996. Open the compatible-vehicles list for every make, model and engine, and read the notes for position or trim qualifiers.

Is ACDELCO 41803 OEM or aftermarket?

What matters is the published application data for this part number, not the label on the box. ACDELCO 41803 is listed with its manufacturer part number so you can compare it to an OEM number or another brand that covers the same fitment.

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