GM vehicle owners dealing with check engine lights or performance issues, listen up! This 4-pack of VVT solenoids might be your fix. These variable valve timing solenoids control oil flow to adjust your camshaft timing for better performance and fuel economy. They replace part numbers 12636175, TS1013, and several others. The compatibility list is huge - works with Buick Enclave, LaCrosse; Cadillac ATS, CTS, SRX; Chevrolet Camaro, Equinox, Traverse; GMC Acadia, Terrain; and many more from around 2004-2020 with 3.6L engines typically. If you're getting timing-related codes or noticing rough idle, power loss, or poor fuel economy, worn VVT solenoids could be the culprit. These are 1:1 matches to your original equipment, so installation is straightforward if you're comfortable working under the hood. The 4-pack is perfect since most vehicles have multiple solenoids - replace them all at once and be done with it. Quality feels solid - no cheap plastic or questionable construction. Much more affordable than buying from the dealership, and you get all four for about what one OEM part might cost. Just make sure to check your specific vehicle compatibility and part numbers before ordering. If you're experiencing timing issues with your GM vehicle, this 4-pack could save you hundreds in repair costs and get your ride running smoothly again. Professional mechanics and DIYers alike appreciate having these reliable replacements on hand.