Description:

IGNITION COIL COMPATIBILITY: for Avalanche 1500 5.3L 2002-2006 for Avalanche 2500 8.1L 2003-2006 for Envoy XL 4.2L 2003-2004 for Envoy XL 5.3L 2003-2004. COILS PACK OE NUMBER: UF271. How to maintain new coils? 1.Prevent ignition coils from heating or damp 2.Do not turn on the ignition switch when the engine is not running 3. Check, clean and fasten the circuit connector frequently to avoid short circuit or grounding 4.The water on the ignition coil can only be dried with a cloth, not with a fire.5. Control engine performance to prevent over voltage. PRODUCT FUNCTIONS: This new premium ignition coil can fit your vehicles perfectly and produce a high output energy, which can keep your engine running well and smoothly.