Important Compatibility Warning
GM used two different ignition coil styles on many LS-based engines:
UF262 (Round Body)
✅ Compatible with this kit
UF271 (Square Body)
❌ Not compatible
Before purchasing:
- Visually inspect your existing ignition coils.
- Confirm your vehicle uses round UF262 coils.
- Verify your original part number.
Checking coil style before ordering helps prevent incorrect fitment.
Compatible Replacement Part Numbers
The ignition coils replace:
- UF262
- UF-262
- D585
- 12563293
- 12573190
- C1251
- C1512
- 610-02839
The spark plug wires are compatible with:
- 748UU
- 748GG
- 9748GG
- 12622553
- 12192195
- 12192192
- 7873
- 88862397
Always verify your OEM part numbers before installation.
Key Features
Upgraded High-Output Ignition Coils
SPARKWHIZ states these coils produce up to 15% more ignition energy than original equipment-style coils.
Potential benefits include:
- Stronger spark
- Improved combustion efficiency
- Better throttle response
- Smoother idle
- Improved engine performance
Higher spark energy can be especially beneficial for high-mileage engines or mild performance upgrades.
Complete 8mm Spark Plug Wire Set
The included 748UU-style ignition wires feature durable 8mm construction for dependable spark delivery.
Advantages include:
- Reliable voltage transfer
- Improved insulation
- Reduced spark leakage
- Long-term durability
Replacing old ignition wires helps maximize the effectiveness of the new ignition coils.
Pre-Installed Heat Shields
The ignition wires include factory-style metal heat shields already installed.
Benefits include:
- Improved protection near exhaust manifolds
- Reduced heat exposure
- Longer wire life
- Easier installation
Heat shielding is particularly valuable on GM truck engines where exhaust temperatures can be high.
Plug-and-Play Installation
The complete ignition kit is designed for direct replacement.
Features include:
- OEM-style connectors
- Direct-fit ignition coils
- Ready-to-install ignition wires
- No modifications required
Most experienced DIY mechanics can complete installation using common hand tools.
Common Symptoms of Failing Ignition Components
If your GM V8 is experiencing:
- Rough idle
- Engine misfires
- Long crank times
- Hard starting
- Poor fuel economy
- Lack of power
- Hesitation
- Check Engine Light
- Inconsistent shifting caused by engine misfires
Replacing worn ignition coils and wires may restore normal engine operation.
Why Replace Coils and Wires Together?
Ignition coils and spark plug wires often wear at similar rates.
Replacing both simultaneously helps:
- Restore balanced ignition performance
- Improve combustion efficiency
- Reduce future maintenance
- Improve reliability
- Protect new ignition components
Complete ignition system service often produces the most noticeable improvement.
Installation Tips
For best results:
- Verify your vehicle uses UF262 round coils.
- Replace one coil and wire at a time.
- Fully seat every electrical connector.
- Confirm proper spark plug wire routing.
- Inspect spark plugs during installation and replace them if needed.
Correct installation helps maximize ignition performance and component life.
Final Verdict
The SPARKWHIZ UF262 Ignition Coil & Spark Plug Wire Kit offers an affordable all-in-one ignition solution for compatible GM LS-based trucks and SUVs equipped with round UF262 ignition coils. Featuring upgraded ignition coils that claim up to 15% more spark energy, durable 8mm ignition wires with pre-installed heat shields, and straightforward plug-and-play installation, this kit is an excellent option for restoring reliable engine performance.
The most important step before ordering is confirming your engine uses UF262 round-body coils, since this kit will not fit vehicles equipped with UF271 square coils.
Frequently Asked Questions
How do I know if my truck uses UF262 or UF271 coils?
Visually inspect your current ignition coils. UF262 coils have a round body, while UF271 coils use a square housing.
Why replace ignition coils and wires together?
Replacing both components at the same time helps maintain balanced ignition performance while reducing future ignition-related repairs.
What do pre-installed heat shields do?
They help protect ignition wires from exhaust heat, extending wire life and reducing the risk of heat-related ignition failures.
Is this a direct-fit replacement?
Yes. The kit is designed as a plug-and-play replacement for compatible GM vehicles equipped with UF262 round ignition coils.
There are no reviews yet.