43 Ignition parts are listed for the 2021 Chevrolet Express 4500, in 9 part types, covering the 6.6L V8 engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2021 Chevrolet Express 4500, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules. Most of the listed parts are Ignition Coil (15 parts), Spark Plug Wire (8 parts) and Spark Plug (7 parts). The other 6 part types cover the remaining 13 parts.
Every part on this page is matched to the 6.6L V8 — the only engine offered in the 2021 Chevrolet Express 4500.
The most listed brands for 2021 Chevrolet Express 4500 ignition parts are GM GENUINE (10 parts), NGK (6 parts) and WALKER PRODUCTS (5 parts), plus 13 more brands. Quality grades include Standard Replacement, Economy and Iridium.
8 parts on this 2021 Chevrolet Express 4500 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including GM GENUINE 12623093 (Camshaft Position Sensor) and DELPHI GN10639 (Ignition Coil). Click any part number to see every vehicle that part fits.
Camshaft Position Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 962277 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| PRENCO | 4E1255 | 🇺🇸 US 🇨🇦 CA | Cam position sensor | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE Popular | 12623093 | 🇺🇸 US 🇨🇦 CA | with Seal | View on Amazon |
| DELPHI | SS11936 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WALKER PRODUCTS | 2351881 | 🇺🇸 US 🇨🇦 CA | Sensor OnlyIncludes Seal | View on Amazon |
This table covers the sensors that report camshaft position to the ECU. Typical signs include a stall, a no-start, or a code for cam or crank correlation. Check the connector and the reluctor gap before replacing the sensor.
5 Camshaft Position Sensor parts are listed for the 2021 Chevrolet Express 4500, from DORMAN, PRENCO, GM GENUINE and 2 other brands. GM GENUINE 12623093 carries the "Popular" badge.
In the Economy grade, DORMAN and PRENCO supply 2 parts: the catalog's value-priced group. A representative part number is DORMAN 962277.
The Standard Replacement section lists 3 options from GM GENUINE, DELPHI and WALKER PRODUCTS — built to original-equipment specification. GM GENUINE 12623093 is listed in this group.
Part numbers include GM GENUINE 12623093, DORMAN 962277 and PRENCO 4E1255, among others listed above.
Camshaft Position Sensor Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 12626252 | 🇺🇸 US 🇨🇦 CA | Color: Orange | View on Amazon |
This table covers the seals at the Camshaft Position Sensor. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
This group shows a single part: GM GENUINE 12626252.
Crankshaft Position Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AUTOTECNICA | GM1419993 | 🇺🇸 US 🇨🇦 CA | Includes Seal | View on Amazon |
| DORMAN | 962602 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 12669636 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WALKER PRODUCTS | 2351881 | 🇺🇸 US 🇨🇦 CA | Sensor OnlyIncludes Seal | View on Amazon |
This table covers the sensors that report crankshaft position and engine speed. Typical signs include a stall, a no-start, or a code for cam or crank correlation. Check the connector and the reluctor gap before replacing the sensor.
4 Crankshaft Position Sensor parts are listed for the 2021 Chevrolet Express 4500, from AUTOTECNICA, DORMAN, GM GENUINE and 1 other brand.
Economy: 2 parts, from AUTOTECNICA and DORMAN. A representative part number is AUTOTECNICA GM1419993.
The Standard Replacement section: 2 options from GM GENUINE and WALKER PRODUCTS. GM GENUINE 12669636 is listed in this group.
Part numbers include AUTOTECNICA GM1419993, DORMAN 962602 and GM GENUINE 12669636, among others listed above.
Ignition Coil
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP | UF742F | 🇺🇸 US 🇨🇦 CA | with Round Coil(s) | View on Amazon |
| HOLSTEIN | 2IGC0538 | 🇺🇸 US 🇨🇦 CA | Round Coil | View on Amazon |
| SPECTRA PREMIUM | C868 | 🇺🇸 US 🇨🇦 CA | Ignition Coil Mounts to Cylinder HeadSquare Type | View on Amazon |
| SPECTRA PREMIUM | C866 | 🇺🇸 US 🇨🇦 CA | Ignition Coil Mounts to Cylinder HeadRound Type | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DELPHI Popular | GN10639 | 🇺🇸 US 🇨🇦 CA | Square Type | View on Amazon |
| DELPHI Popular | GN10165 | 🇺🇸 US 🇨🇦 CA | Round Body | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK Popular | 48881 | 🇺🇸 US 🇨🇦 CA | with Round Ignition Coil | View on Amazon |
| GM GENUINE | 12723610 | 🇺🇸 US 🇨🇦 CA | Service Coils Marked MelcoDelphi Coil | View on Amazon |
| GM GENUINE | 12726023 | 🇺🇸 US 🇨🇦 CA | Services Coils Marked DelphiMelco Coil | View on Amazon |
| NGK | 48882 | 🇺🇸 US 🇨🇦 CA | with Square Type Coil | View on Amazon |
| STANDARD MOTOR PRODUCTS | UF742 | 🇺🇸 US 🇨🇦 CA | with Round Coil(s) | View on Amazon |
| WALKER PRODUCTS | 9201061 | 🇺🇸 US 🇨🇦 CA | Single Coil | View on Amazon |
| WALKER PRODUCTS | 92830558 | 🇺🇸 US 🇨🇦 CA | Coil Set | View on Amazon |
| WELLS | 5C1877 | 🇺🇸 US 🇨🇦 CA | with Delco Coil(s)Square Shape Coil | View on Amazon |
| WELLS | 5C1876 | 🇺🇸 US 🇨🇦 CA | with Delphi Coil(s)Round Shape Coil | View on Amazon |
This table covers the coils that fire each spark plug. Typical signs include a misfire that follows one cylinder, a snap in damp weather, or a coil that is swollen or cracked. Swap a suspect coil with a neighbor to confirm, then replace boots that tore on the way off.
15 Ignition Coil parts are listed for the 2021 Chevrolet Express 4500, from SPECTRA PREMIUM, DELPHI, NGK and 6 other brands. DELPHI GN10639 carries the "Popular" badge.
Economy: 4 parts, from SPECTRA PREMIUM, FVP and HOLSTEIN. A representative part number is FVP UF742F.
The Premium section lists 2 options from DELPHI — a step above OE specification in materials, tolerances or warranty terms. DELPHI GN10639 is listed in this group.
The Standard Replacement section: 9 options from NGK, GM GENUINE, WALKER PRODUCTS and 2 other brands. NGK 48881 is listed in this group.
Ignition Lock Cylinder
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 84668679 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the lock cylinders in the ignition switch.
One part is listed for the 2021 Chevrolet Express 4500 — GM GENUINE 84668679.
Ignition Lock Housing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 84646279 | 🇺🇸 US 🇨🇦 CA | Fits Push to Turn Design with Lock Bolt HoleDriver Side Inflation Restraint System (AJ3), Driver and Passenger Front Seat Inflatable Restraint System (AK5), Active Brake Control (JL4), Tilt Steering Column (9J6) | View on Amazon |
This table covers the Ignition Lock housings.
This group shows a single part: GM GENUINE 84646279.
Spark Plug
Summary: Notes include pre-set gaps of 0.035", 0.040" and 0.044". Replacement brands in this table include NGK, ACDELCO and BOSCH.
Iridium (lasts up to 4x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular | 41168 | 🇺🇸 US 🇨🇦 CA | GM Original EquipmentIridium | View on Amazon |
| NGK Popular | 4344 | 🇺🇸 US 🇨🇦 CA | Iridium IXPre-Set Gap: 0.044" | View on Amazon |
| BOSCH | 96307 | 🇺🇸 US 🇨🇦 CA | OE Fine Wire Double IridiumPre-Set Gap: 0.035" | View on Amazon |
| CHAMPION | 9777 | 🇺🇸 US 🇨🇦 CA | IridiumPre-Set Gap: 0.04" | View on Amazon |
| NGK | 91418 | 🇺🇸 US 🇨🇦 CA | Laser IridiumStock Number: 91418 | View on Amazon |
Platinum (lasts up to 2x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK | 5019 | 🇺🇸 US 🇨🇦 CA | G-PowerPre-Set Gap: 0.040" | View on Amazon |
Ruthenium (maximum durability & ignitability)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK | 90220 | 🇺🇸 US 🇨🇦 CA | Ruthenium HX High IgnitabilityPre-Set Gap: 0.044" | View on Amazon |
This table covers the spark plugs for this engine. Typical signs include misfire under load, rough idle, or a flashing check-engine light. Verify the gap even on pre-gapped plugs, and replace coil boots that come off a high-mileage engine.
7 Spark Plug parts for the 2021 Chevrolet Express 4500 come from 4 brands — NGK, ACDELCO, BOSCH and 1 other brand. The "Popular" part is ACDELCO 41168.
In the Iridium (lasts up to 4x longer than Copper / Nickel) grade, NGK, ACDELCO, BOSCH and 1 other brand supply 5 parts: grouped under the catalog's "Iridium (lasts up to 4x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO 41168.
The Platinum (lasts up to 2x longer than Copper / Nickel) section lists 1 option from NGK — grouped under the catalog's "Platinum (lasts up to 2x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. NGK 5019 is listed in this group.
The Ruthenium (maximum durability & ignitability) section lists 1 option from NGK — grouped under the catalog's "Ruthenium (maximum durability & ignitability)" designation — the notes column spells out what sets them apart. NGK 90220 is listed in this group.
This group includes ACDELCO 41168, NGK 4344 and BOSCH 96307 and the remaining parts above.
Spark Plug Tube Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GM GENUINE | 12645141 | 🇺🇸 US 🇨🇦 CA | Material: Rubber | View on Amazon |
This table covers the seals at the Spark Plug Tube. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
One part is listed for the 2021 Chevrolet Express 4500 — GM GENUINE 12645141.
Spark Plug Wire
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKP | SK19431551 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| STANDARD MOTOR PRODUCTS | 3147 | 🇺🇸 US 🇨🇦 CA | SetOutside Diameter: 9 | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | 7873 | 🇺🇸 US 🇨🇦 CA | SetOutside Diameter: 10 | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular | 9748UU | 🇺🇸 US 🇨🇦 CA | GoldSet | View on Amazon |
| WALKER PRODUCTS Popular | 9241829A | 🇺🇸 US 🇨🇦 CA | Direct FitSet | View on Amazon |
| GM GENUINE | 12716289 | 🇺🇸 US 🇨🇦 CA | Distributor Coil End Boot Degree: 45 DD | View on Amazon |
| GM GENUINE | 19431550 | 🇺🇸 US 🇨🇦 CA | SetDistributor Coil End Terminal Type: Snap Lock | View on Amazon |
| STANDARD MOTOR PRODUCTS | 27873 | 🇺🇸 US 🇨🇦 CA | Pro SeriesSet | View on Amazon |
This table covers the Spark Plug wires.
8 Spark Plug Wire parts are listed for the 2021 Chevrolet Express 4500, from STANDARD MOTOR PRODUCTS, GM GENUINE, SKP and 2 other brands. ACDELCO 9748UU carries the "Popular" badge.
Economy: 2 parts, from SKP and STANDARD MOTOR PRODUCTS. A representative part number is SKP SK19431551.
The Premium section: 1 option from STANDARD MOTOR PRODUCTS. STANDARD MOTOR PRODUCTS 7873 is listed in this group.
The Standard Replacement section: 5 options from GM GENUINE, ACDELCO, WALKER PRODUCTS and 1 other brand. ACDELCO 9748UU is listed in this group.
This group includes ACDELCO 9748UU, SKP SK19431551 and STANDARD MOTOR PRODUCTS 3147 and the remaining parts above.
Buying Ignition Parts for a 2021 Chevrolet Express 4500
On this vehicle, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.
- Confirm you have the 6.6L V8 engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Ignition Coil and Spark Plug Wire .
Frequently Asked Questions
How many ignition parts fit the 2021 Chevrolet Express 4500?
Our catalog currently lists 43 ignition parts for the 2021 Chevrolet Express 4500 across 9 subcategories and 16 brands, covering the 6.6L V8 engine. Each part is matched to the engine(s) it fits.
What are the signs of ignition problems on a 2021 Chevrolet Express 4500?
Common symptoms include misfires under load, rough idle, flashing check-engine light, or poor starting in damp weather. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What spark-plug gap is listed for the 2021 Chevrolet Express 4500?
Notes on this page include pre-set gaps of 0.035", 0.040" and 0.044". Still verify against spec — even “pre-gapped” plugs should be checked before they go in.
What should I replace at the same time?
Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2021 Chevrolet Express 4500 was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2021 Chevrolet Express 4500?
Every part on this page is matched to the 6.6L V8 engine. Then gap matters even on “pre-gapped” plugs — verify against spec, and replace coil boots when they come off a high-mileage engine. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Chevrolet Express 4500
Ignition Parts for Other Chevrolet Express 4500 Years
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